display fids at the end

5192: Fix empty document addition r=irevoire a=irevoire

# Pull Request

## Related issue
Fixes #5190

## What does this PR do?
- Improve a test just to make sure this issue never arises again
- Fix the issue

For the reviewer: Calling `add_documents` with an empty `mmap` seems to work, but does it impact the perf in a significant way? / 

Co-authored-by: Tamo <tamo@meilisearch.com>

Cargo.lock

@@ -496,7 +496,7 @@ source = "git+https://github.com/meilisearch/bbqueue#cbb87cc707b5af415ef203bdaf2
 
 [[package]]
 name = "benchmarks"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "anyhow",
  "bumpalo",
@@ -689,7 +689,7 @@ dependencies = [
 
 [[package]]
 name = "build-info"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "anyhow",
  "time",
@@ -706,6 +706,20 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bumparaw-collections"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ce682bdc86c2e25ef5cd95881d9d6a1902214eddf74cf9ffea88fe1464377e8"
+dependencies = [
+ "allocator-api2",
+ "bitpacking",
+ "bumpalo",
+ "hashbrown 0.15.1",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "byte-unit"
 version = "5.1.4"
@@ -1650,7 +1664,7 @@ dependencies = [
 
 [[package]]
 name = "dump"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "anyhow",
  "big_s",
@@ -1862,7 +1876,7 @@ checksum = "486f806e73c5707928240ddc295403b1b93c96a02038563881c4a2fd84b81ac4"
 
 [[package]]
 name = "file-store"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "tempfile",
  "thiserror",
@@ -1884,7 +1898,7 @@ dependencies = [
 
 [[package]]
 name = "filter-parser"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "insta",
  "nom",
@@ -1904,7 +1918,7 @@ dependencies = [
 
 [[package]]
 name = "flatten-serde-json"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "criterion",
  "serde_json",
@@ -2043,7 +2057,7 @@ dependencies = [
 
 [[package]]
 name = "fuzzers"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "arbitrary",
  "bumpalo",
@@ -2610,13 +2624,15 @@ checksum = "206ca75c9c03ba3d4ace2460e57b189f39f43de612c2f85836e65c929701bb2d"
 
 [[package]]
 name = "index-scheduler"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "anyhow",
  "arroy 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "big_s",
  "bincode",
  "bumpalo",
+ "bumparaw-collections",
+ "convert_case 0.6.0",
  "crossbeam-channel",
  "csv",
  "derive_builder 0.20.0",
@@ -2631,7 +2647,6 @@ dependencies = [
  "meilisearch-types",
  "memmap2",
  "page_size",
- "raw-collections",
  "rayon",
  "roaring",
  "serde",
@@ -2647,12 +2662,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.2.6"
+version = "2.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "168fb715dda47215e360912c096649d23d58bf392ac62f73919e831745e40f26"
+checksum = "62f822373a4fe84d4bb149bf54e584a7f4abec90e072ed49cda0edea5b95471f"
 dependencies = [
  "equivalent",
- "hashbrown 0.14.3",
+ "hashbrown 0.15.1",
  "serde",
 ]
 
@@ -2807,7 +2822,7 @@ dependencies = [
 
 [[package]]
 name = "json-depth-checker"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "criterion",
  "serde_json",
@@ -3426,7 +3441,7 @@ checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
 
 [[package]]
 name = "meili-snap"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "insta",
  "md5",
@@ -3435,7 +3450,7 @@ dependencies = [
 
 [[package]]
 name = "meilisearch"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "actix-cors",
  "actix-http",
@@ -3525,7 +3540,7 @@ dependencies = [
 
 [[package]]
 name = "meilisearch-auth"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "base64 0.22.1",
  "enum-iterator",
@@ -3544,11 +3559,12 @@ dependencies = [
 
 [[package]]
 name = "meilisearch-types"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "actix-web",
  "anyhow",
  "bumpalo",
+ "bumparaw-collections",
  "convert_case 0.6.0",
  "csv",
  "deserr",
@@ -3561,8 +3577,8 @@ dependencies = [
  "meili-snap",
  "memmap2",
  "milli",
- "raw-collections",
  "roaring",
+ "rustc-hash 2.1.0",
  "serde",
  "serde-cs",
  "serde_json",
@@ -3576,16 +3592,19 @@ dependencies = [
 
 [[package]]
 name = "meilitool"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "anyhow",
  "arroy 0.5.0 (git+https://github.com/meilisearch/arroy/?tag=DO-NOT-DELETE-upgrade-v04-to-v05)",
  "clap",
  "dump",
  "file-store",
+ "indexmap",
  "meilisearch-auth",
  "meilisearch-types",
  "serde",
+ "serde_json",
+ "tempfile",
  "time",
  "uuid",
 ]
@@ -3608,7 +3627,7 @@ dependencies = [
 
 [[package]]
 name = "milli"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "allocator-api2",
  "arroy 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3618,6 +3637,7 @@ dependencies = [
  "bincode",
  "bstr",
  "bumpalo",
+ "bumparaw-collections",
  "bytemuck",
  "byteorder",
  "candle-core",
@@ -3656,13 +3676,12 @@ dependencies = [
  "once_cell",
  "ordered-float",
  "rand",
- "raw-collections",
  "rayon",
  "rayon-par-bridge",
  "rhai",
  "roaring",
  "rstar",
- "rustc-hash 2.0.0",
+ "rustc-hash 2.1.0",
  "serde",
  "serde_json",
  "slice-group-by",
@@ -4064,7 +4083,7 @@ checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
 [[package]]
 name = "permissive-json-pointer"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "big_s",
  "serde_json",
@@ -4411,7 +4430,7 @@ dependencies = [
  "bytes",
  "rand",
  "ring",
- "rustc-hash 2.0.0",
+ "rustc-hash 2.1.0",
  "rustls",
  "slab",
  "thiserror",
@@ -4487,19 +4506,6 @@ dependencies = [
  "rand",
 ]
 
-[[package]]
-name = "raw-collections"
-version = "0.1.0"
-source = "git+https://github.com/meilisearch/raw-collections.git#15e5d7bdebc0c149b2a28b2454f307c717d07f8a"
-dependencies = [
- "allocator-api2",
- "bitpacking",
- "bumpalo",
- "hashbrown 0.15.1",
- "serde",
- "serde_json",
-]
-
 [[package]]
 name = "raw-cpuid"
 version = "10.7.0"
@@ -4797,9 +4803,9 @@ checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
 [[package]]
 name = "rustc-hash"
-version = "2.0.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "583034fd73374156e66797ed8e5b0d5690409c9226b22d87cb7f19821c05d152"
+checksum = "c7fb8039b3032c191086b10f11f319a6e99e1e82889c5cc6046f515c9db1d497"
 
 [[package]]
 name = "rustc_version"
@@ -4968,9 +4974,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.132"
+version = "1.0.133"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d726bfaff4b320266d395898905d0eba0345aae23b54aee3a737e260fd46db03"
+checksum = "c7fceb2473b9166b2294ef05efcb65a3db80803f0b03ef86a5fc88a2b85ee377"
 dependencies = [
  "indexmap",
  "itoa",
@@ -6480,7 +6486,7 @@ dependencies = [
 
 [[package]]
 name = "xtask"
-version = "1.12.0"
+version = "1.12.1"
 dependencies = [
  "anyhow",
  "build-info",

Cargo.toml

@@ -22,7 +22,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.12.0"
+version = "1.12.1"
 authors = [
     "Quentin de Quelen <quentin@dequelen.me>",
     "Clément Renault <clement@meilisearch.com>",

crates/benchmarks/benches/indexing.rs

@@ -8,6 +8,7 @@ use bumpalo::Bump;
 use criterion::{criterion_group, criterion_main, Criterion};
 use milli::documents::PrimaryKey;
 use milli::heed::{EnvOpenOptions, RwTxn};
+use milli::progress::Progress;
 use milli::update::new::indexer;
 use milli::update::{IndexDocumentsMethod, IndexerConfig, Settings};
 use milli::vector::EmbeddingConfigs;
@@ -151,7 +152,7 @@ fn indexing_songs_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -166,7 +167,7 @@ fn indexing_songs_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -218,7 +219,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -233,7 +234,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -263,7 +264,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -278,7 +279,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -332,7 +333,7 @@ fn deleting_songs_in_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -347,7 +348,7 @@ fn deleting_songs_in_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -409,7 +410,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -424,7 +425,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -454,7 +455,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -469,7 +470,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -495,7 +496,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -510,7 +511,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -563,7 +564,7 @@ fn indexing_songs_without_faceted_numbers(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -578,7 +579,7 @@ fn indexing_songs_without_faceted_numbers(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -630,7 +631,7 @@ fn indexing_songs_without_faceted_fields(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -645,7 +646,7 @@ fn indexing_songs_without_faceted_fields(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -697,7 +698,7 @@ fn indexing_wiki(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -712,7 +713,7 @@ fn indexing_wiki(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -763,7 +764,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -778,7 +779,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -808,7 +809,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -823,7 +824,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -876,7 +877,7 @@ fn deleting_wiki_in_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -891,7 +892,7 @@ fn deleting_wiki_in_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -953,7 +954,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -968,7 +969,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -999,7 +1000,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1014,7 +1015,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1041,7 +1042,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1056,7 +1057,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1108,7 +1109,7 @@ fn indexing_movies_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1123,7 +1124,7 @@ fn indexing_movies_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1174,7 +1175,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1189,7 +1190,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1219,7 +1220,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1234,7 +1235,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1287,7 +1288,7 @@ fn deleting_movies_in_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1302,7 +1303,7 @@ fn deleting_movies_in_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1350,7 +1351,7 @@ fn delete_documents_from_ids(index: Index, document_ids_to_delete: Vec<RoaringBi
             &document_changes,
             EmbeddingConfigs::default(),
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
 
@@ -1400,7 +1401,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1415,7 +1416,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1445,7 +1446,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1460,7 +1461,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1486,7 +1487,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1501,7 +1502,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1576,7 +1577,7 @@ fn indexing_nested_movies_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1591,7 +1592,7 @@ fn indexing_nested_movies_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1667,7 +1668,7 @@ fn deleting_nested_movies_in_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1682,7 +1683,7 @@ fn deleting_nested_movies_in_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1750,7 +1751,7 @@ fn indexing_nested_movies_without_faceted_fields(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1765,7 +1766,7 @@ fn indexing_nested_movies_without_faceted_fields(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1817,7 +1818,7 @@ fn indexing_geo(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1832,7 +1833,7 @@ fn indexing_geo(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1883,7 +1884,7 @@ fn reindexing_geo(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1898,7 +1899,7 @@ fn reindexing_geo(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1928,7 +1929,7 @@ fn reindexing_geo(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -1943,7 +1944,7 @@ fn reindexing_geo(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 
@@ -1996,7 +1997,7 @@ fn deleting_geo_in_batches_default(c: &mut Criterion) {
                         None,
                         &mut new_fields_ids_map,
                         &|| false,
-                        &|_progress| (),
+                        Progress::default(),
                     )
                     .unwrap();
 
@@ -2011,7 +2012,7 @@ fn deleting_geo_in_batches_default(c: &mut Criterion) {
                     &document_changes,
                     EmbeddingConfigs::default(),
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
                 .unwrap();
 

crates/benchmarks/benches/utils.rs

@@ -10,6 +10,7 @@ use bumpalo::Bump;
 use criterion::BenchmarkId;
 use memmap2::Mmap;
 use milli::heed::EnvOpenOptions;
+use milli::progress::Progress;
 use milli::update::new::indexer;
 use milli::update::{IndexDocumentsMethod, IndexerConfig, Settings};
 use milli::vector::EmbeddingConfigs;
@@ -110,7 +111,7 @@ pub fn base_setup(conf: &Conf) -> Index {
             None,
             &mut new_fields_ids_map,
             &|| false,
-            &|_progress| (),
+            Progress::default(),
         )
         .unwrap();
 
@@ -125,7 +126,7 @@ pub fn base_setup(conf: &Conf) -> Index {
         &document_changes,
         EmbeddingConfigs::default(),
         &|| false,
-        &|_| (),
+        &Progress::default(),
     )
     .unwrap();
 

crates/file-store/src/lib.rs

@@ -136,6 +136,14 @@ pub struct File {
 }
 
 impl File {
+    pub fn from_parts(path: PathBuf, file: Option<NamedTempFile>) -> Self {
+        Self { path, file }
+    }
+
+    pub fn into_parts(self) -> (PathBuf, Option<NamedTempFile>) {
+        (self.path, self.file)
+    }
+
     pub fn dry_file() -> Result<Self> {
         Ok(Self { path: PathBuf::new(), file: None })
     }

crates/fuzzers/src/bin/fuzz-indexing.rs

@@ -10,6 +10,7 @@ use either::Either;
 use fuzzers::Operation;
 use milli::documents::mmap_from_objects;
 use milli::heed::EnvOpenOptions;
+use milli::progress::Progress;
 use milli::update::new::indexer;
 use milli::update::{IndexDocumentsMethod, IndexerConfig};
 use milli::vector::EmbeddingConfigs;
@@ -128,7 +129,7 @@ fn main() {
                                     None,
                                     &mut new_fields_ids_map,
                                     &|| false,
-                                    &|_progress| (),
+                                    Progress::default(),
                                 )
                                 .unwrap();
 
@@ -143,7 +144,7 @@ fn main() {
                                 &document_changes,
                                 embedders,
                                 &|| false,
-                                &|_| (),
+                                &Progress::default(),
                             )
                             .unwrap();
 

crates/index-scheduler/Cargo.toml

@@ -13,6 +13,9 @@ license.workspace = true
 [dependencies]
 anyhow = "1.0.86"
 bincode = "1.3.3"
+bumpalo = "3.16.0"
+bumparaw-collections = "0.1.2"
+convert_case = "0.6.0"
 csv = "1.3.0"
 derive_builder = "0.20.0"
 dump = { path = "../dump" }
@@ -21,8 +24,8 @@ file-store = { path = "../file-store" }
 flate2 = "1.0.30"
 meilisearch-auth = { path = "../meilisearch-auth" }
 meilisearch-types = { path = "../meilisearch-types" }
+memmap2 = "0.9.4"
 page_size = "0.6.0"
-raw-collections = { git = "https://github.com/meilisearch/raw-collections.git", version = "0.1.0" }
 rayon = "1.10.0"
 roaring = { version = "0.10.7", features = ["serde"] }
 serde = { version = "1.0.204", features = ["derive"] }
@@ -30,7 +33,6 @@ serde_json = { version = "1.0.120", features = ["preserve_order"] }
 synchronoise = "1.0.1"
 tempfile = "3.10.1"
 thiserror = "1.0.61"
-memmap2 = "0.9.4"
 time = { version = "0.3.36", features = [
     "serde-well-known",
     "formatting",
@@ -40,7 +42,6 @@ time = { version = "0.3.36", features = [
 tracing = "0.1.40"
 ureq = "2.10.0"
 uuid = { version = "1.10.0", features = ["serde", "v4"] }
-bumpalo = "3.16.0"
 
 [dev-dependencies]
 arroy = "0.5.0"

crates/index-scheduler/src/batch.rs

@@ -22,27 +22,26 @@ use std::ffi::OsStr;
 use std::fmt;
 use std::fs::{self, File};
 use std::io::BufWriter;
-use std::sync::atomic::{self, AtomicU64};
+use std::sync::atomic::Ordering;
-use std::time::Duration;
 
 use bumpalo::collections::CollectIn;
 use bumpalo::Bump;
 use dump::IndexMetadata;
 use meilisearch_types::batches::BatchId;
-use meilisearch_types::error::Code;
 use meilisearch_types::heed::{RoTxn, RwTxn};
 use meilisearch_types::milli::documents::{obkv_to_object, DocumentsBatchReader, PrimaryKey};
 use meilisearch_types::milli::heed::CompactionOption;
+use meilisearch_types::milli::progress::Progress;
 use meilisearch_types::milli::update::new::indexer::{self, UpdateByFunction};
-use meilisearch_types::milli::update::{IndexDocumentsMethod, Settings as MilliSettings};
+use meilisearch_types::milli::update::{
+    DocumentAdditionResult, IndexDocumentsMethod, Settings as MilliSettings,
+};
 use meilisearch_types::milli::vector::parsed_vectors::{
     ExplicitVectors, VectorOrArrayOfVectors, RESERVED_VECTORS_FIELD_NAME,
 };
 use meilisearch_types::milli::{self, Filter, ThreadPoolNoAbortBuilder};
 use meilisearch_types::settings::{apply_settings_to_builder, Settings, Unchecked};
-use meilisearch_types::tasks::{
+use meilisearch_types::tasks::{Details, IndexSwap, Kind, KindWithContent, Status, Task};
-    Details, IndexSwap, Kind, KindWithContent, Status, Task, TaskProgress,
-};
 use meilisearch_types::{compression, Index, VERSION_FILE_NAME};
 use roaring::RoaringBitmap;
 use time::macros::format_description;
@@ -50,6 +49,13 @@ use time::OffsetDateTime;
 use uuid::Uuid;
 
 use crate::autobatcher::{self, BatchKind};
+use crate::processing::{
+    AtomicBatchStep, AtomicDocumentStep, AtomicTaskStep, AtomicUpdateFileStep, CreateIndexProgress,
+    DeleteIndexProgress, DocumentDeletionProgress, DocumentEditionProgress,
+    DocumentOperationProgress, DumpCreationProgress, InnerSwappingTwoIndexes, SettingsProgress,
+    SnapshotCreationProgress, SwappingTheIndexes, TaskCancelationProgress, TaskDeletionProgress,
+    UpdateIndexProgress, VariableNameStep,
+};
 use crate::utils::{self, swap_index_uid_in_task, ProcessingBatch};
 use crate::{Error, IndexScheduler, Result, TaskId};
 
@@ -497,7 +503,6 @@ impl IndexScheduler {
         // 5. We make a batch from the unprioritised tasks. Start by taking the next enqueued task.
         let task_id = if let Some(task_id) = enqueued.min() { task_id } else { return Ok(None) };
         let mut task = self.get_task(rtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
-        current_batch.processing(Some(&mut task));
 
         // If the task is not associated with any index, verify that it is an index swap and
         // create the batch directly. Otherwise, get the index name associated with the task
@@ -507,6 +512,7 @@ impl IndexScheduler {
             index_name
         } else {
             assert!(matches!(&task.kind, KindWithContent::IndexSwap { swaps } if swaps.is_empty()));
+            current_batch.processing(Some(&mut task));
             return Ok(Some((Batch::IndexSwap { task }, current_batch)));
         };
 
@@ -560,11 +566,12 @@ impl IndexScheduler {
     /// The list of tasks that were processed. The metadata of each task in the returned
     /// list is updated accordingly, with the exception of the its date fields
     /// [`finished_at`](meilisearch_types::tasks::Task::finished_at) and [`started_at`](meilisearch_types::tasks::Task::started_at).
-    #[tracing::instrument(level = "trace", skip(self, batch), target = "indexing::scheduler", fields(batch=batch.to_string()))]
+    #[tracing::instrument(level = "trace", skip(self, batch, progress), target = "indexing::scheduler", fields(batch=batch.to_string()))]
     pub(crate) fn process_batch(
         &self,
         batch: Batch,
         current_batch: &mut ProcessingBatch,
+        progress: Progress,
     ) -> Result<Vec<Task>> {
         #[cfg(test)]
         {
@@ -584,8 +591,13 @@ impl IndexScheduler {
                     };
 
                 let rtxn = self.env.read_txn()?;
-                let mut canceled_tasks =
+                let mut canceled_tasks = self.cancel_matched_tasks(
-                    self.cancel_matched_tasks(&rtxn, task.uid, current_batch, matched_tasks)?;
+                    &rtxn,
+                    task.uid,
+                    current_batch,
+                    matched_tasks,
+                    &progress,
+                )?;
 
                 task.status = Status::Succeeded;
                 match &mut task.details {
@@ -616,7 +628,8 @@ impl IndexScheduler {
                 }
 
                 let mut wtxn = self.env.write_txn()?;
-                let mut deleted_tasks = self.delete_matched_tasks(&mut wtxn, &matched_tasks)?;
+                let mut deleted_tasks =
+                    self.delete_matched_tasks(&mut wtxn, &matched_tasks, &progress)?;
                 wtxn.commit()?;
 
                 for task in tasks.iter_mut() {
@@ -642,6 +655,8 @@ impl IndexScheduler {
                 Ok(tasks)
             }
             Batch::SnapshotCreation(mut tasks) => {
+                progress.update_progress(SnapshotCreationProgress::StartTheSnapshotCreation);
+
                 fs::create_dir_all(&self.snapshots_path)?;
                 let temp_snapshot_dir = tempfile::tempdir()?;
 
@@ -662,6 +677,7 @@ impl IndexScheduler {
                 // two read operations as the task processing is synchronous.
 
                 // 2.1 First copy the LMDB env of the index-scheduler
+                progress.update_progress(SnapshotCreationProgress::SnapshotTheIndexScheduler);
                 let dst = temp_snapshot_dir.path().join("tasks");
                 fs::create_dir_all(&dst)?;
                 self.env.copy_to_file(dst.join("data.mdb"), CompactionOption::Enabled)?;
@@ -674,27 +690,41 @@ impl IndexScheduler {
                 fs::create_dir_all(&update_files_dir)?;
 
                 // 2.4 Only copy the update files of the enqueued tasks
-                for task_id in self.get_status(&rtxn, Status::Enqueued)? {
+                progress.update_progress(SnapshotCreationProgress::SnapshotTheUpdateFiles);
+                let enqueued = self.get_status(&rtxn, Status::Enqueued)?;
+                let (atomic, update_file_progress) =
+                    AtomicUpdateFileStep::new(enqueued.len() as u32);
+                progress.update_progress(update_file_progress);
+                for task_id in enqueued {
                     let task = self.get_task(&rtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
                     if let Some(content_uuid) = task.content_uuid() {
                         let src = self.file_store.get_update_path(content_uuid);
                         let dst = update_files_dir.join(content_uuid.to_string());
                         fs::copy(src, dst)?;
                     }
+                    atomic.fetch_add(1, Ordering::Relaxed);
                 }
 
                 // 3. Snapshot every indexes
-                for result in self.index_mapper.index_mapping.iter(&rtxn)? {
+                progress.update_progress(SnapshotCreationProgress::SnapshotTheIndexes);
+                let index_mapping = self.index_mapper.index_mapping;
+                let nb_indexes = index_mapping.len(&rtxn)? as u32;
+
+                for (i, result) in index_mapping.iter(&rtxn)?.enumerate() {
                     let (name, uuid) = result?;
+                    progress.update_progress(VariableNameStep::new(name, i as u32, nb_indexes));
                     let index = self.index_mapper.index(&rtxn, name)?;
                     let dst = temp_snapshot_dir.path().join("indexes").join(uuid.to_string());
                     fs::create_dir_all(&dst)?;
-                    index.copy_to_file(dst.join("data.mdb"), CompactionOption::Enabled)?;
+                    index
+                        .copy_to_file(dst.join("data.mdb"), CompactionOption::Enabled)
+                        .map_err(|e| Error::from_milli(e, Some(name.to_string())))?;
                 }
 
                 drop(rtxn);
 
                 // 4. Snapshot the auth LMDB env
+                progress.update_progress(SnapshotCreationProgress::SnapshotTheApiKeys);
                 let dst = temp_snapshot_dir.path().join("auth");
                 fs::create_dir_all(&dst)?;
                 // TODO We can't use the open_auth_store_env function here but we should
@@ -707,6 +737,7 @@ impl IndexScheduler {
                 auth.copy_to_file(dst.join("data.mdb"), CompactionOption::Enabled)?;
 
                 // 5. Copy and tarball the flat snapshot
+                progress.update_progress(SnapshotCreationProgress::CreateTheTarball);
                 // 5.1 Find the original name of the database
                 // TODO find a better way to get this path
                 let mut base_path = self.env.path().to_owned();
@@ -739,6 +770,7 @@ impl IndexScheduler {
                 Ok(tasks)
             }
             Batch::Dump(mut task) => {
+                progress.update_progress(DumpCreationProgress::StartTheDumpCreation);
                 let started_at = OffsetDateTime::now_utc();
                 let (keys, instance_uid) =
                     if let KindWithContent::DumpCreation { keys, instance_uid } = &task.kind {
@@ -749,6 +781,7 @@ impl IndexScheduler {
                 let dump = dump::DumpWriter::new(*instance_uid)?;
 
                 // 1. dump the keys
+                progress.update_progress(DumpCreationProgress::DumpTheApiKeys);
                 let mut dump_keys = dump.create_keys()?;
                 for key in keys {
                     dump_keys.push_key(key)?;
@@ -758,7 +791,13 @@ impl IndexScheduler {
                 let rtxn = self.env.read_txn()?;
 
                 // 2. dump the tasks
+                progress.update_progress(DumpCreationProgress::DumpTheTasks);
                 let mut dump_tasks = dump.create_tasks_queue()?;
+
+                let (atomic, update_task_progress) =
+                    AtomicTaskStep::new(self.all_tasks.len(&rtxn)? as u32);
+                progress.update_progress(update_task_progress);
+
                 for ret in self.all_tasks.iter(&rtxn)? {
                     if self.must_stop_processing.get() {
                         return Err(Error::AbortedTask);
@@ -791,50 +830,84 @@ impl IndexScheduler {
                             let content_file = self.file_store.get_update(content_file)?;
 
                             let reader = DocumentsBatchReader::from_reader(content_file)
-                                .map_err(milli::Error::from)?;
+                                .map_err(|e| Error::from_milli(e.into(), None))?;
 
                             let (mut cursor, documents_batch_index) =
                                 reader.into_cursor_and_fields_index();
 
-                            while let Some(doc) =
+                            while let Some(doc) = cursor
-                                cursor.next_document().map_err(milli::Error::from)?
+                                .next_document()
+                                .map_err(|e| Error::from_milli(e.into(), None))?
                             {
-                                dump_content_file
+                                dump_content_file.push_document(
-                                    .push_document(&obkv_to_object(doc, &documents_batch_index)?)?;
+                                    &obkv_to_object(doc, &documents_batch_index)
+                                        .map_err(|e| Error::from_milli(e, None))?,
+                                )?;
                             }
                             dump_content_file.flush()?;
                         }
                     }
+                    atomic.fetch_add(1, Ordering::Relaxed);
                 }
                 dump_tasks.flush()?;
 
                 // 3. Dump the indexes
+                progress.update_progress(DumpCreationProgress::DumpTheIndexes);
+                let nb_indexes = self.index_mapper.index_mapping.len(&rtxn)? as u32;
+                let mut count = 0;
                 self.index_mapper.try_for_each_index(&rtxn, |uid, index| -> Result<()> {
+                    progress.update_progress(VariableNameStep::new(
+                        uid.to_string(),
+                        count,
+                        nb_indexes,
+                    ));
+                    count += 1;
+
                     let rtxn = index.read_txn()?;
                     let metadata = IndexMetadata {
                         uid: uid.to_owned(),
                         primary_key: index.primary_key(&rtxn)?.map(String::from),
-                        created_at: index.created_at(&rtxn)?,
+                        created_at: index
-                        updated_at: index.updated_at(&rtxn)?,
+                            .created_at(&rtxn)
+                            .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?,
+                        updated_at: index
+                            .updated_at(&rtxn)
+                            .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?,
                     };
                     let mut index_dumper = dump.create_index(uid, &metadata)?;
 
                     let fields_ids_map = index.fields_ids_map(&rtxn)?;
                     let all_fields: Vec<_> = fields_ids_map.iter().map(|(id, _)| id).collect();
-                    let embedding_configs = index.embedding_configs(&rtxn)?;
+                    let embedding_configs = index
+                        .embedding_configs(&rtxn)
+                        .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
 
+                    let nb_documents = index
+                        .number_of_documents(&rtxn)
+                        .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?
+                        as u32;
+                    let (atomic, update_document_progress) = AtomicDocumentStep::new(nb_documents);
+                    progress.update_progress(update_document_progress);
+                    let documents = index
+                        .all_documents(&rtxn)
+                        .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
                     // 3.1. Dump the documents
-                    for ret in index.all_documents(&rtxn)? {
+                    for ret in documents {
                         if self.must_stop_processing.get() {
                             return Err(Error::AbortedTask);
                         }
 
-                        let (id, doc) = ret?;
+                        let (id, doc) =
+                            ret.map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
 
-                        let mut document = milli::obkv_to_json(&all_fields, &fields_ids_map, doc)?;
+                        let mut document =
+                            milli::obkv_to_json(&all_fields, &fields_ids_map, doc)
+                                .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
 
                         'inject_vectors: {
-                            let embeddings = index.embeddings(&rtxn, id)?;
+                            let embeddings = index
+                                .embeddings(&rtxn, id)
+                                .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
 
                             if embeddings.is_empty() {
                                 break 'inject_vectors;
@@ -845,7 +918,7 @@ impl IndexScheduler {
                                 .or_insert(serde_json::Value::Object(Default::default()));
 
                             let serde_json::Value::Object(vectors) = vectors else {
-                                return Err(milli::Error::UserError(
+                                let user_err = milli::Error::UserError(
                                     milli::UserError::InvalidVectorsMapType {
                                         document_id: {
                                             if let Ok(Some(Ok(index))) = index
@@ -859,8 +932,9 @@ impl IndexScheduler {
                                         },
                                         value: vectors.clone(),
                                     },
-                                )
+                                );
-                                .into());
+
+                                return Err(Error::from_milli(user_err, Some(uid.to_string())));
                             };
 
                             for (embedder_name, embeddings) in embeddings {
@@ -883,6 +957,7 @@ impl IndexScheduler {
                         }
 
                         index_dumper.push_document(&document)?;
+                        atomic.fetch_add(1, Ordering::Relaxed);
                     }
 
                     // 3.2. Dump the settings
@@ -890,12 +965,14 @@ impl IndexScheduler {
                         index,
                         &rtxn,
                         meilisearch_types::settings::SecretPolicy::RevealSecrets,
-                    )?;
+                    )
+                    .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?;
                     index_dumper.settings(&settings)?;
                     Ok(())
                 })?;
 
                 // 4. Dump experimental feature settings
+                progress.update_progress(DumpCreationProgress::DumpTheExperimentalFeatures);
                 let features = self.features().runtime_features();
                 dump.create_experimental_features(features)?;
 
@@ -906,6 +983,7 @@ impl IndexScheduler {
                 if self.must_stop_processing.get() {
                     return Err(Error::AbortedTask);
                 }
+                progress.update_progress(DumpCreationProgress::CompressTheDump);
                 let path = self.dumps_path.join(format!("{}.dump", dump_uid));
                 let file = File::create(path)?;
                 dump.persist_to(BufWriter::new(file))?;
@@ -931,7 +1009,7 @@ impl IndexScheduler {
                     .set_currently_updating_index(Some((index_uid.clone(), index.clone())));
 
                 let mut index_wtxn = index.write_txn()?;
-                let tasks = self.apply_index_operation(&mut index_wtxn, &index, op)?;
+                let tasks = self.apply_index_operation(&mut index_wtxn, &index, op, progress)?;
 
                 {
                     let span = tracing::trace_span!(target: "indexing::scheduler", "commit");
@@ -946,7 +1024,8 @@ impl IndexScheduler {
                 // the entire batch.
                 let res = || -> Result<()> {
                     let index_rtxn = index.read_txn()?;
-                    let stats = crate::index_mapper::IndexStats::new(&index, &index_rtxn)?;
+                    let stats = crate::index_mapper::IndexStats::new(&index, &index_rtxn)
+                        .map_err(|e| Error::from_milli(e, Some(index_uid.to_string())))?;
                     let mut wtxn = self.env.write_txn()?;
                     self.index_mapper.store_stats_of(&mut wtxn, &index_uid, &stats)?;
                     wtxn.commit()?;
@@ -964,6 +1043,8 @@ impl IndexScheduler {
                 Ok(tasks)
             }
             Batch::IndexCreation { index_uid, primary_key, task } => {
+                progress.update_progress(CreateIndexProgress::CreatingTheIndex);
+
                 let wtxn = self.env.write_txn()?;
                 if self.index_mapper.exists(&wtxn, &index_uid)? {
                     return Err(Error::IndexAlreadyExists(index_uid));
@@ -973,9 +1054,11 @@ impl IndexScheduler {
                 self.process_batch(
                     Batch::IndexUpdate { index_uid, primary_key, task },
                     current_batch,
+                    progress,
                 )
             }
             Batch::IndexUpdate { index_uid, primary_key, mut task } => {
+                progress.update_progress(UpdateIndexProgress::UpdatingTheIndex);
                 let rtxn = self.env.read_txn()?;
                 let index = self.index_mapper.index(&rtxn, &index_uid)?;
 
@@ -988,10 +1071,12 @@ impl IndexScheduler {
                     );
                     builder.set_primary_key(primary_key);
                     let must_stop_processing = self.must_stop_processing.clone();
-                    builder.execute(
+                    builder
-                        |indexing_step| tracing::debug!(update = ?indexing_step),
+                        .execute(
-                        || must_stop_processing.get(),
+                            |indexing_step| tracing::debug!(update = ?indexing_step),
-                    )?;
+                            || must_stop_processing.get(),
+                        )
+                        .map_err(|e| Error::from_milli(e, Some(index_uid.to_string())))?;
                     index_wtxn.commit()?;
                 }
 
@@ -1008,7 +1093,8 @@ impl IndexScheduler {
                 let res = || -> Result<()> {
                     let mut wtxn = self.env.write_txn()?;
                     let index_rtxn = index.read_txn()?;
-                    let stats = crate::index_mapper::IndexStats::new(&index, &index_rtxn)?;
+                    let stats = crate::index_mapper::IndexStats::new(&index, &index_rtxn)
+                        .map_err(|e| Error::from_milli(e, Some(index_uid.clone())))?;
                     self.index_mapper.store_stats_of(&mut wtxn, &index_uid, &stats)?;
                     wtxn.commit()?;
                     Ok(())
@@ -1025,13 +1111,16 @@ impl IndexScheduler {
                 Ok(vec![task])
             }
             Batch::IndexDeletion { index_uid, index_has_been_created, mut tasks } => {
+                progress.update_progress(DeleteIndexProgress::DeletingTheIndex);
                 let wtxn = self.env.write_txn()?;
 
                 // it's possible that the index doesn't exist
                 let number_of_documents = || -> Result<u64> {
                     let index = self.index_mapper.index(&wtxn, &index_uid)?;
                     let index_rtxn = index.read_txn()?;
-                    Ok(index.number_of_documents(&index_rtxn)?)
+                    index
+                        .number_of_documents(&index_rtxn)
+                        .map_err(|e| Error::from_milli(e, Some(index_uid.to_string())))
                 }()
                 .unwrap_or_default();
 
@@ -1056,6 +1145,8 @@ impl IndexScheduler {
                 Ok(tasks)
             }
             Batch::IndexSwap { mut task } => {
+                progress.update_progress(SwappingTheIndexes::EnsuringCorrectnessOfTheSwap);
+
                 let mut wtxn = self.env.write_txn()?;
                 let swaps = if let KindWithContent::IndexSwap { swaps } = &task.kind {
                     swaps
@@ -1082,8 +1173,20 @@ impl IndexScheduler {
                         ));
                     }
                 }
-                for swap in swaps {
+                progress.update_progress(SwappingTheIndexes::SwappingTheIndexes);
-                    self.apply_index_swap(&mut wtxn, task.uid, &swap.indexes.0, &swap.indexes.1)?;
+                for (step, swap) in swaps.iter().enumerate() {
+                    progress.update_progress(VariableNameStep::new(
+                        format!("swapping index {} and {}", swap.indexes.0, swap.indexes.1),
+                        step as u32,
+                        swaps.len() as u32,
+                    ));
+                    self.apply_index_swap(
+                        &mut wtxn,
+                        &progress,
+                        task.uid,
+                        &swap.indexes.0,
+                        &swap.indexes.1,
+                    )?;
                 }
                 wtxn.commit()?;
                 task.status = Status::Succeeded;
@@ -1093,7 +1196,15 @@ impl IndexScheduler {
     }
 
     /// Swap the index `lhs` with the index `rhs`.
-    fn apply_index_swap(&self, wtxn: &mut RwTxn, task_id: u32, lhs: &str, rhs: &str) -> Result<()> {
+    fn apply_index_swap(
+        &self,
+        wtxn: &mut RwTxn,
+        progress: &Progress,
+        task_id: u32,
+        lhs: &str,
+        rhs: &str,
+    ) -> Result<()> {
+        progress.update_progress(InnerSwappingTwoIndexes::RetrieveTheTasks);
         // 1. Verify that both lhs and rhs are existing indexes
         let index_lhs_exists = self.index_mapper.index_exists(wtxn, lhs)?;
         if !index_lhs_exists {
@@ -1111,14 +1222,21 @@ impl IndexScheduler {
         index_rhs_task_ids.remove_range(task_id..);
 
         // 3. before_name -> new_name in the task's KindWithContent
-        for task_id in &index_lhs_task_ids | &index_rhs_task_ids {
+        progress.update_progress(InnerSwappingTwoIndexes::UpdateTheTasks);
+        let tasks_to_update = &index_lhs_task_ids | &index_rhs_task_ids;
+        let (atomic, task_progress) = AtomicTaskStep::new(tasks_to_update.len() as u32);
+        progress.update_progress(task_progress);
+
+        for task_id in tasks_to_update {
             let mut task = self.get_task(wtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
             swap_index_uid_in_task(&mut task, (lhs, rhs));
             self.all_tasks.put(wtxn, &task_id, &task)?;
+            atomic.fetch_add(1, Ordering::Relaxed);
         }
 
         // 4. remove the task from indexuid = before_name
         // 5. add the task to indexuid = after_name
+        progress.update_progress(InnerSwappingTwoIndexes::UpdateTheIndexesMetadata);
         self.update_index(wtxn, lhs, |lhs_tasks| {
             *lhs_tasks -= &index_lhs_task_ids;
             *lhs_tasks |= &index_rhs_task_ids;
@@ -1140,7 +1258,7 @@ impl IndexScheduler {
     /// The list of processed tasks.
     #[tracing::instrument(
         level = "trace",
-        skip(self, index_wtxn, index),
+        skip(self, index_wtxn, index, progress),
         target = "indexing::scheduler"
     )]
     fn apply_index_operation<'i>(
@@ -1148,48 +1266,18 @@ impl IndexScheduler {
         index_wtxn: &mut RwTxn<'i>,
         index: &'i Index,
         operation: IndexOperation,
+        progress: Progress,
     ) -> Result<Vec<Task>> {
         let indexer_alloc = Bump::new();
 
         let started_processing_at = std::time::Instant::now();
-        let secs_since_started_processing_at = AtomicU64::new(0);
-        const PRINT_SECS_DELTA: u64 = 5;
-
-        let processing_tasks = self.processing_tasks.clone();
         let must_stop_processing = self.must_stop_processing.clone();
-        let send_progress = |progress| {
-            let now = std::time::Instant::now();
-            let elapsed = secs_since_started_processing_at.load(atomic::Ordering::Relaxed);
-            let previous = started_processing_at + Duration::from_secs(elapsed);
-            let elapsed = now - previous;
-
-            if elapsed.as_secs() < PRINT_SECS_DELTA {
-                return;
-            }
-
-            secs_since_started_processing_at
-                .store((now - started_processing_at).as_secs(), atomic::Ordering::Relaxed);
-
-            let TaskProgress {
-                current_step,
-                finished_steps,
-                total_steps,
-                finished_substeps,
-                total_substeps,
-            } = processing_tasks.write().unwrap().update_progress(progress);
-
-            tracing::info!(
-                current_step,
-                finished_steps,
-                total_steps,
-                finished_substeps,
-                total_substeps
-            );
-        };
 
         match operation {
-            IndexOperation::DocumentClear { mut tasks, .. } => {
+            IndexOperation::DocumentClear { index_uid, mut tasks } => {
-                let count = milli::update::ClearDocuments::new(index_wtxn, index).execute()?;
+                let count = milli::update::ClearDocuments::new(index_wtxn, index)
+                    .execute()
+                    .map_err(|e| Error::from_milli(e, Some(index_uid)))?;
 
                 let mut first_clear_found = false;
                 for task in &mut tasks {
@@ -1209,12 +1297,13 @@ impl IndexScheduler {
                 Ok(tasks)
             }
             IndexOperation::DocumentOperation {
-                index_uid: _,
+                index_uid,
                 primary_key,
                 method,
                 operations,
                 mut tasks,
             } => {
+                progress.update_progress(DocumentOperationProgress::RetrievingConfig);
                 // TODO: at some point, for better efficiency we might want to reuse the bumpalo for successive batches.
                 // this is made difficult by the fact we're doing private clones of the index scheduler and sending it
                 // to a fresh thread.
@@ -1223,9 +1312,7 @@ impl IndexScheduler {
                     if let DocumentOperation::Add(content_uuid) = operation {
                         let content_file = self.file_store.get_update(*content_uuid)?;
                         let mmap = unsafe { memmap2::Mmap::map(&content_file)? };
-                        if !mmap.is_empty() {
+                        content_files.push(mmap);
-                            content_files.push(mmap);
-                        }
                     }
                 }
 
@@ -1235,13 +1322,17 @@ impl IndexScheduler {
 
                 let mut content_files_iter = content_files.iter();
                 let mut indexer = indexer::DocumentOperation::new(method);
-                let embedders = index.embedding_configs(index_wtxn)?;
+                let embedders = index
-                let embedders = self.embedders(embedders)?;
+                    .embedding_configs(index_wtxn)
+                    .map_err(|e| Error::from_milli(e, Some(index_uid.clone())))?;
+                let embedders = self.embedders(index_uid.clone(), embedders)?;
                 for operation in operations {
                     match operation {
                         DocumentOperation::Add(_content_uuid) => {
                             let mmap = content_files_iter.next().unwrap();
-                            indexer.add_documents(mmap)?;
+                            indexer
+                                .add_documents(mmap)
+                                .map_err(|e| Error::from_milli(e, Some(index_uid.clone())))?;
                         }
                         DocumentOperation::Delete(document_ids) => {
                             let document_ids: bumpalo::collections::vec::Vec<_> = document_ids
@@ -1266,19 +1357,22 @@ impl IndexScheduler {
                     }
                 };
 
-                let (document_changes, operation_stats, primary_key) = indexer.into_changes(
+                progress.update_progress(DocumentOperationProgress::ComputingDocumentChanges);
-                    &indexer_alloc,
+                let (document_changes, operation_stats, primary_key) = indexer
-                    index,
+                    .into_changes(
-                    &rtxn,
+                        &indexer_alloc,
-                    primary_key.as_deref(),
+                        index,
-                    &mut new_fields_ids_map,
+                        &rtxn,
-                    &|| must_stop_processing.get(),
+                        primary_key.as_deref(),
-                    &send_progress,
+                        &mut new_fields_ids_map,
-                )?;
+                        &|| must_stop_processing.get(),
+                        progress.clone(),
+                    )
+                    .map_err(|e| Error::from_milli(e, Some(index_uid.clone())))?;
 
-                let mut addition = 0;
+                let mut candidates_count = 0;
                 for (stats, task) in operation_stats.into_iter().zip(&mut tasks) {
-                    addition += stats.document_count;
+                    candidates_count += stats.document_count;
                     match stats.error {
                         Some(error) => {
                             task.status = Status::Failed;
@@ -1308,6 +1402,7 @@ impl IndexScheduler {
                     }
                 }
 
+                progress.update_progress(DocumentOperationProgress::Indexing);
                 if tasks.iter().any(|res| res.error.is_none()) {
                     indexer::index(
                         index_wtxn,
@@ -1320,15 +1415,25 @@ impl IndexScheduler {
                         &document_changes,
                         embedders,
                         &|| must_stop_processing.get(),
-                        &send_progress,
+                        &progress,
-                    )?;
+                    )
+                    .map_err(|e| Error::from_milli(e, Some(index_uid.clone())))?;
+
+                    let addition = DocumentAdditionResult {
+                        indexed_documents: candidates_count,
+                        number_of_documents: index
+                            .number_of_documents(index_wtxn)
+                            .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?,
+                    };
 
                     tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
                 }
 
                 Ok(tasks)
             }
-            IndexOperation::DocumentEdition { mut task, .. } => {
+            IndexOperation::DocumentEdition { index_uid, mut task } => {
+                progress.update_progress(DocumentEditionProgress::RetrievingConfig);
+
                 let (filter, code) = if let KindWithContent::DocumentEdition {
                     filter_expr,
                     context: _,
@@ -1342,16 +1447,11 @@ impl IndexScheduler {
                 };
 
                 let candidates = match filter.as_ref().map(Filter::from_json) {
-                    Some(Ok(Some(filter))) => {
+                    Some(Ok(Some(filter))) => filter
-                        filter.evaluate(index_wtxn, index).map_err(|err| match err {
+                        .evaluate(index_wtxn, index)
-                            milli::Error::UserError(milli::UserError::InvalidFilter(_)) => {
+                        .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?,
-                                Error::from(err).with_custom_error_code(Code::InvalidDocumentFilter)
-                            }
-                            e => e.into(),
-                        })?
-                    }
                     None | Some(Ok(None)) => index.documents_ids(index_wtxn)?,
-                    Some(Err(e)) => return Err(e.into()),
+                    Some(Err(e)) => return Err(Error::from_milli(e, Some(index_uid.clone()))),
                 };
 
                 let (original_filter, context, function) = if let Some(Details::DocumentEdition {
@@ -1386,8 +1486,9 @@ impl IndexScheduler {
                 // candidates not empty => index not empty => a primary key is set
                 let primary_key = index.primary_key(&rtxn)?.unwrap();
 
-                let primary_key = PrimaryKey::new_or_insert(primary_key, &mut new_fields_ids_map)
+                let primary_key =
-                    .map_err(milli::Error::from)?;
+                    PrimaryKey::new_or_insert(primary_key, &mut new_fields_ids_map)
+                        .map_err(|err| Error::from_milli(err.into(), Some(index_uid.clone())))?;
 
                 let result_count = Ok((candidates.len(), candidates.len())) as Result<_>;
 
@@ -1405,13 +1506,22 @@ impl IndexScheduler {
                         }
                     };
 
+                    let candidates_count = candidates.len();
+                    progress.update_progress(DocumentEditionProgress::ComputingDocumentChanges);
                     let indexer = UpdateByFunction::new(candidates, context.clone(), code.clone());
-                    let document_changes =
+                    let document_changes = pool
-                        pool.install(|| indexer.into_changes(&primary_key)).unwrap()?;
+                        .install(|| {
-
+                            indexer
-                    let embedders = index.embedding_configs(index_wtxn)?;
+                                .into_changes(&primary_key)
-                    let embedders = self.embedders(embedders)?;
+                                .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))
+                        })
+                        .unwrap()?;
+                    let embedders = index
+                        .embedding_configs(index_wtxn)
+                        .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?;
+                    let embedders = self.embedders(index_uid.clone(), embedders)?;
 
+                    progress.update_progress(DocumentEditionProgress::Indexing);
                     indexer::index(
                         index_wtxn,
                         index,
@@ -1423,10 +1533,18 @@ impl IndexScheduler {
                         &document_changes,
                         embedders,
                         &|| must_stop_processing.get(),
-                        &send_progress,
+                        &progress,
-                    )?;
+                    )
+                    .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?;
 
-                    // tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
+                    let addition = DocumentAdditionResult {
+                        indexed_documents: candidates_count,
+                        number_of_documents: index
+                            .number_of_documents(index_wtxn)
+                            .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?,
+                    };
+
+                    tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
                 }
 
                 match result_count {
@@ -1455,7 +1573,9 @@ impl IndexScheduler {
 
                 Ok(vec![task])
             }
-            IndexOperation::DocumentDeletion { mut tasks, index_uid: _ } => {
+            IndexOperation::DocumentDeletion { mut tasks, index_uid } => {
+                progress.update_progress(DocumentDeletionProgress::RetrievingConfig);
+
                 let mut to_delete = RoaringBitmap::new();
                 let external_documents_ids = index.external_documents_ids();
 
@@ -1476,35 +1596,23 @@ impl IndexScheduler {
                                 deleted_documents: Some(will_be_removed),
                             });
                         }
-                        KindWithContent::DocumentDeletionByFilter { index_uid: _, filter_expr } => {
+                        KindWithContent::DocumentDeletionByFilter { index_uid, filter_expr } => {
                             let before = to_delete.len();
                             let filter = match Filter::from_json(filter_expr) {
                                 Ok(filter) => filter,
                                 Err(err) => {
                                     // theorically, this should be catched by deserr before reaching the index-scheduler and cannot happens
                                     task.status = Status::Failed;
-                                    task.error = match err {
+                                    task.error = Some(
-                                        milli::Error::UserError(
+                                        Error::from_milli(err, Some(index_uid.clone())).into(),
-                                            milli::UserError::InvalidFilterExpression { .. },
+                                    );
-                                        ) => Some(
-                                            Error::from(err)
-                                                .with_custom_error_code(Code::InvalidDocumentFilter)
-                                                .into(),
-                                        ),
-                                        e => Some(e.into()),
-                                    };
                                     None
                                 }
                             };
                             if let Some(filter) = filter {
-                                let candidates =
+                                let candidates = filter
-                                    filter.evaluate(index_wtxn, index).map_err(|err| match err {
+                                    .evaluate(index_wtxn, index)
-                                        milli::Error::UserError(
+                                    .map_err(|err| Error::from_milli(err, Some(index_uid.clone())));
-                                            milli::UserError::InvalidFilter(_),
-                                        ) => Error::from(err)
-                                            .with_custom_error_code(Code::InvalidDocumentFilter),
-                                        e => e.into(),
-                                    });
                                 match candidates {
                                     Ok(candidates) => to_delete |= candidates,
                                     Err(err) => {
@@ -1540,8 +1648,9 @@ impl IndexScheduler {
                 // to_delete not empty => index not empty => primary key set
                 let primary_key = index.primary_key(&rtxn)?.unwrap();
 
-                let primary_key = PrimaryKey::new_or_insert(primary_key, &mut new_fields_ids_map)
+                let primary_key =
-                    .map_err(milli::Error::from)?;
+                    PrimaryKey::new_or_insert(primary_key, &mut new_fields_ids_map)
+                        .map_err(|err| Error::from_milli(err.into(), Some(index_uid.clone())))?;
 
                 if !tasks.iter().all(|res| res.error.is_some()) {
                     let local_pool;
@@ -1557,12 +1666,17 @@ impl IndexScheduler {
                         }
                     };
 
+                    progress.update_progress(DocumentDeletionProgress::DeleteDocuments);
                     let mut indexer = indexer::DocumentDeletion::new();
+                    let candidates_count = to_delete.len();
                     indexer.delete_documents_by_docids(to_delete);
                     let document_changes = indexer.into_changes(&indexer_alloc, primary_key);
-                    let embedders = index.embedding_configs(index_wtxn)?;
+                    let embedders = index
-                    let embedders = self.embedders(embedders)?;
+                        .embedding_configs(index_wtxn)
+                        .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?;
+                    let embedders = self.embedders(index_uid.clone(), embedders)?;
 
+                    progress.update_progress(DocumentDeletionProgress::Indexing);
                     indexer::index(
                         index_wtxn,
                         index,
@@ -1574,15 +1688,24 @@ impl IndexScheduler {
                         &document_changes,
                         embedders,
                         &|| must_stop_processing.get(),
-                        &send_progress,
+                        &progress,
-                    )?;
+                    )
+                    .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?;
 
-                    // tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
+                    let addition = DocumentAdditionResult {
+                        indexed_documents: candidates_count,
+                        number_of_documents: index
+                            .number_of_documents(index_wtxn)
+                            .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?,
+                    };
+
+                    tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
                 }
 
                 Ok(tasks)
             }
-            IndexOperation::Settings { index_uid: _, settings, mut tasks } => {
+            IndexOperation::Settings { index_uid, settings, mut tasks } => {
+                progress.update_progress(SettingsProgress::RetrievingAndMergingTheSettings);
                 let indexer_config = self.index_mapper.indexer_config();
                 let mut builder = milli::update::Settings::new(index_wtxn, index, indexer_config);
 
@@ -1596,10 +1719,13 @@ impl IndexScheduler {
                     task.status = Status::Succeeded;
                 }
 
-                builder.execute(
+                progress.update_progress(SettingsProgress::ApplyTheSettings);
-                    |indexing_step| tracing::debug!(update = ?indexing_step),
+                builder
-                    || must_stop_processing.get(),
+                    .execute(
-                )?;
+                        |indexing_step| tracing::debug!(update = ?indexing_step),
+                        || must_stop_processing.get(),
+                    )
+                    .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?;
 
                 Ok(tasks)
             }
@@ -1616,12 +1742,14 @@ impl IndexScheduler {
                         index_uid: index_uid.clone(),
                         tasks: cleared_tasks,
                     },
+                    progress.clone(),
                 )?;
 
                 let settings_tasks = self.apply_index_operation(
                     index_wtxn,
                     index,
                     IndexOperation::Settings { index_uid, settings, tasks: settings_tasks },
+                    progress,
                 )?;
 
                 let mut tasks = settings_tasks;
@@ -1638,15 +1766,18 @@ impl IndexScheduler {
         &self,
         wtxn: &mut RwTxn,
         matched_tasks: &RoaringBitmap,
+        progress: &Progress,
     ) -> Result<RoaringBitmap> {
+        progress.update_progress(TaskDeletionProgress::DeletingTasksDateTime);
+
         // 1. Remove from this list the tasks that we are not allowed to delete
         let enqueued_tasks = self.get_status(wtxn, Status::Enqueued)?;
         let processing_tasks = &self.processing_tasks.read().unwrap().processing.clone();
 
         let all_task_ids = self.all_task_ids(wtxn)?;
         let mut to_delete_tasks = all_task_ids & matched_tasks;
-        to_delete_tasks -= processing_tasks;
+        to_delete_tasks -= &**processing_tasks;
-        to_delete_tasks -= enqueued_tasks;
+        to_delete_tasks -= &enqueued_tasks;
 
         // 2. We now have a list of tasks to delete, delete them
 
@@ -1657,6 +1788,8 @@ impl IndexScheduler {
         // The tasks that have been removed *per batches*.
         let mut affected_batches: HashMap<BatchId, RoaringBitmap> = HashMap::new();
 
+        let (atomic_progress, task_progress) = AtomicTaskStep::new(to_delete_tasks.len() as u32);
+        progress.update_progress(task_progress);
         for task_id in to_delete_tasks.iter() {
             let task = self.get_task(wtxn, task_id)?.ok_or(Error::CorruptedTaskQueue)?;
 
@@ -1680,22 +1813,35 @@ impl IndexScheduler {
             if let Some(batch_uid) = task.batch_uid {
                 affected_batches.entry(batch_uid).or_default().insert(task_id);
             }
+            atomic_progress.fetch_add(1, Ordering::Relaxed);
         }
 
+        progress.update_progress(TaskDeletionProgress::DeletingTasksMetadata);
+        let (atomic_progress, task_progress) = AtomicTaskStep::new(
+            (affected_indexes.len() + affected_statuses.len() + affected_kinds.len()) as u32,
+        );
+        progress.update_progress(task_progress);
         for index in affected_indexes.iter() {
             self.update_index(wtxn, index, |bitmap| *bitmap -= &to_delete_tasks)?;
+            atomic_progress.fetch_add(1, Ordering::Relaxed);
         }
 
         for status in affected_statuses.iter() {
             self.update_status(wtxn, *status, |bitmap| *bitmap -= &to_delete_tasks)?;
+            atomic_progress.fetch_add(1, Ordering::Relaxed);
         }
 
         for kind in affected_kinds.iter() {
             self.update_kind(wtxn, *kind, |bitmap| *bitmap -= &to_delete_tasks)?;
+            atomic_progress.fetch_add(1, Ordering::Relaxed);
         }
 
+        progress.update_progress(TaskDeletionProgress::DeletingTasks);
+        let (atomic_progress, task_progress) = AtomicTaskStep::new(to_delete_tasks.len() as u32);
+        progress.update_progress(task_progress);
         for task in to_delete_tasks.iter() {
             self.all_tasks.delete(wtxn, &task)?;
+            atomic_progress.fetch_add(1, Ordering::Relaxed);
         }
         for canceled_by in affected_canceled_by {
             if let Some(mut tasks) = self.canceled_by.get(wtxn, &canceled_by)? {
@@ -1707,6 +1853,9 @@ impl IndexScheduler {
                 }
             }
         }
+        progress.update_progress(TaskDeletionProgress::DeletingBatches);
+        let (atomic_progress, batch_progress) = AtomicBatchStep::new(affected_batches.len() as u32);
+        progress.update_progress(batch_progress);
         for (batch_id, to_delete_tasks) in affected_batches {
             if let Some(mut tasks) = self.batch_to_tasks_mapping.get(wtxn, &batch_id)? {
                 tasks -= &to_delete_tasks;
@@ -1748,6 +1897,7 @@ impl IndexScheduler {
                     }
                 }
             }
+            atomic_progress.fetch_add(1, Ordering::Relaxed);
         }
 
         Ok(to_delete_tasks)
@@ -1762,21 +1912,36 @@ impl IndexScheduler {
         cancel_task_id: TaskId,
         current_batch: &mut ProcessingBatch,
         matched_tasks: &RoaringBitmap,
+        progress: &Progress,
     ) -> Result<Vec<Task>> {
+        progress.update_progress(TaskCancelationProgress::RetrievingTasks);
+
         // 1. Remove from this list the tasks that we are not allowed to cancel
         //    Notice that only the _enqueued_ ones are cancelable and we should
         //    have already aborted the indexation of the _processing_ ones
         let cancelable_tasks = self.get_status(rtxn, Status::Enqueued)?;
         let tasks_to_cancel = cancelable_tasks & matched_tasks;
 
-        // 2. We now have a list of tasks to cancel, cancel them
+        let (task_progress, progress_obj) = AtomicTaskStep::new(tasks_to_cancel.len() as u32);
-        let mut tasks = self.get_existing_tasks(rtxn, tasks_to_cancel.iter())?;
+        progress.update_progress(progress_obj);
 
+        // 2. We now have a list of tasks to cancel, cancel them
+        let mut tasks = self.get_existing_tasks(
+            rtxn,
+            tasks_to_cancel.iter().inspect(|_| {
+                task_progress.fetch_add(1, Ordering::Relaxed);
+            }),
+        )?;
+
+        progress.update_progress(TaskCancelationProgress::UpdatingTasks);
+        let (task_progress, progress_obj) = AtomicTaskStep::new(tasks_to_cancel.len() as u32);
+        progress.update_progress(progress_obj);
         for task in tasks.iter_mut() {
             task.status = Status::Canceled;
             task.canceled_by = Some(cancel_task_id);
             task.details = task.details.as_ref().map(|d| d.to_failed());
             current_batch.processing(Some(task));
+            task_progress.fetch_add(1, Ordering::Relaxed);
         }
 
         Ok(tasks)

crates/index-scheduler/src/error.rs

@@ -104,7 +104,7 @@ pub enum Error {
     )]
     InvalidTaskCanceledBy { canceled_by: String },
     #[error(
-        "{index_uid} is not a valid index uid. Index uid can be an integer or a string containing only alphanumeric characters, hyphens (-) and underscores (_), and can not be more than 512 bytes."
+        "{index_uid} is not a valid index uid. Index uid can be an integer or a string containing only alphanumeric characters, hyphens (-) and underscores (_), and can not be more than 400 bytes."
     )]
     InvalidIndexUid { index_uid: String },
     #[error("Task `{0}` not found.")]
@@ -122,8 +122,11 @@ pub enum Error {
     Dump(#[from] dump::Error),
     #[error(transparent)]
     Heed(#[from] heed::Error),
-    #[error(transparent)]
+    #[error("{}", match .index_uid {
-    Milli(#[from] milli::Error),
+        Some(uid) if !uid.is_empty() => format!("Index `{}`: {error}", uid),
+        _ => format!("{error}")
+    })]
+    Milli { error: milli::Error, index_uid: Option<String> },
     #[error("An unexpected crash occurred when processing the task.")]
     ProcessBatchPanicked,
     #[error(transparent)]
@@ -190,7 +193,7 @@ impl Error {
             | Error::AbortedTask
             | Error::Dump(_)
             | Error::Heed(_)
-            | Error::Milli(_)
+            | Error::Milli { .. }
             | Error::ProcessBatchPanicked
             | Error::FileStore(_)
             | Error::IoError(_)
@@ -209,6 +212,20 @@ impl Error {
     pub fn with_custom_error_code(self, code: Code) -> Self {
         Self::WithCustomErrorCode(code, Box::new(self))
     }
+
+    pub fn from_milli(err: milli::Error, index_uid: Option<String>) -> Self {
+        match err {
+            milli::Error::UserError(milli::UserError::InvalidFilter(_)) => {
+                Self::Milli { error: err, index_uid }
+                    .with_custom_error_code(Code::InvalidDocumentFilter)
+            }
+            milli::Error::UserError(milli::UserError::InvalidFilterExpression { .. }) => {
+                Self::Milli { error: err, index_uid }
+                    .with_custom_error_code(Code::InvalidDocumentFilter)
+            }
+            _ => Self::Milli { error: err, index_uid },
+        }
+    }
 }
 
 impl ErrorCode for Error {
@@ -236,7 +253,7 @@ impl ErrorCode for Error {
             // TODO: not sure of the Code to use
             Error::NoSpaceLeftInTaskQueue => Code::NoSpaceLeftOnDevice,
             Error::Dump(e) => e.error_code(),
-            Error::Milli(e) => e.error_code(),
+            Error::Milli { error, .. } => error.error_code(),
             Error::ProcessBatchPanicked => Code::Internal,
             Error::Heed(e) => e.error_code(),
             Error::HeedTransaction(e) => e.error_code(),

crates/index-scheduler/src/index_mapper/index_map.rs

@@ -3,14 +3,13 @@ use std::path::Path;
 use std::time::Duration;
 
 use meilisearch_types::heed::{EnvClosingEvent, EnvFlags, EnvOpenOptions};
-use meilisearch_types::milli::Index;
+use meilisearch_types::milli::{Index, Result};
 use time::OffsetDateTime;
 use uuid::Uuid;
 
 use super::IndexStatus::{self, Available, BeingDeleted, Closing, Missing};
+use crate::clamp_to_page_size;
 use crate::lru::{InsertionOutcome, LruMap};
-use crate::{clamp_to_page_size, Result};
-
 /// Keep an internally consistent view of the open indexes in memory.
 ///
 /// This view is made of an LRU cache that will evict the least frequently used indexes when new indexes are opened.

crates/index-scheduler/src/index_mapper/mod.rs

@@ -5,6 +5,7 @@ use std::{fs, thread};
 
 use meilisearch_types::heed::types::{SerdeJson, Str};
 use meilisearch_types::heed::{Database, Env, RoTxn, RwTxn};
+use meilisearch_types::milli;
 use meilisearch_types::milli::update::IndexerConfig;
 use meilisearch_types::milli::{FieldDistribution, Index};
 use serde::{Deserialize, Serialize};
@@ -121,7 +122,7 @@ impl IndexStats {
     /// # Parameters
     ///
     /// - rtxn: a RO transaction for the index, obtained from `Index::read_txn()`.
-    pub fn new(index: &Index, rtxn: &RoTxn) -> Result<Self> {
+    pub fn new(index: &Index, rtxn: &RoTxn) -> milli::Result<Self> {
         Ok(IndexStats {
             number_of_documents: index.number_of_documents(rtxn)?,
             database_size: index.on_disk_size()?,
@@ -183,13 +184,18 @@ impl IndexMapper {
                 // Error if the UUIDv4 somehow already exists in the map, since it should be fresh.
                 // This is very unlikely to happen in practice.
                 // TODO: it would be better to lazily create the index. But we need an Index::open function for milli.
-                let index = self.index_map.write().unwrap().create(
+                let index = self
-                    &uuid,
+                    .index_map
-                    &index_path,
+                    .write()
-                    date,
+                    .unwrap()
-                    self.enable_mdb_writemap,
+                    .create(
-                    self.index_base_map_size,
+                        &uuid,
-                )?;
+                        &index_path,
+                        date,
+                        self.enable_mdb_writemap,
+                        self.index_base_map_size,
+                    )
+                    .map_err(|e| Error::from_milli(e, Some(uuid.to_string())))?;
 
                 wtxn.commit()?;
 
@@ -357,7 +363,9 @@ impl IndexMapper {
                     };
                     let index_path = self.base_path.join(uuid.to_string());
                     // take the lock to reopen the environment.
-                    reopen.reopen(&mut self.index_map.write().unwrap(), &index_path)?;
+                    reopen
+                        .reopen(&mut self.index_map.write().unwrap(), &index_path)
+                        .map_err(|e| Error::from_milli(e, Some(uuid.to_string())))?;
                     continue;
                 }
                 BeingDeleted => return Err(Error::IndexNotFound(name.to_string())),
@@ -372,13 +380,15 @@ impl IndexMapper {
                         Missing => {
                             let index_path = self.base_path.join(uuid.to_string());
 
-                            break index_map.create(
+                            break index_map
-                                &uuid,
+                                .create(
-                                &index_path,
+                                    &uuid,
-                                None,
+                                    &index_path,
-                                self.enable_mdb_writemap,
+                                    None,
-                                self.index_base_map_size,
+                                    self.enable_mdb_writemap,
-                            )?;
+                                    self.index_base_map_size,
+                                )
+                                .map_err(|e| Error::from_milli(e, Some(uuid.to_string())))?;
                         }
                         Available(index) => break index,
                         Closing(_) => {
@@ -460,6 +470,7 @@ impl IndexMapper {
                 let index = self.index(rtxn, index_uid)?;
                 let index_rtxn = index.read_txn()?;
                 IndexStats::new(&index, &index_rtxn)
+                    .map_err(|e| Error::from_milli(e, Some(uuid.to_string())))
             }
         }
     }

crates/index-scheduler/src/insta_snapshot.rs

@@ -353,7 +353,7 @@ pub fn snapshot_canceled_by(rtxn: &RoTxn, db: Database<BEU32, RoaringBitmapCodec
 
 pub fn snapshot_batch(batch: &Batch) -> String {
     let mut snap = String::new();
-    let Batch { uid, details, stats, started_at, finished_at } = batch;
+    let Batch { uid, details, stats, started_at, finished_at, progress: _ } = batch;
     if let Some(finished_at) = finished_at {
         assert!(finished_at > started_at);
     }

crates/index-scheduler/src/lib.rs

@@ -26,6 +26,7 @@ mod index_mapper;
 #[cfg(test)]
 mod insta_snapshot;
 mod lru;
+mod processing;
 mod utils;
 pub mod uuid_codec;
 
@@ -56,12 +57,12 @@ use meilisearch_types::heed::types::{SerdeBincode, SerdeJson, Str, I128};
 use meilisearch_types::heed::{self, Database, Env, PutFlags, RoTxn, RwTxn};
 use meilisearch_types::milli::documents::DocumentsBatchBuilder;
 use meilisearch_types::milli::index::IndexEmbeddingConfig;
-use meilisearch_types::milli::update::new::indexer::document_changes::Progress;
 use meilisearch_types::milli::update::IndexerConfig;
 use meilisearch_types::milli::vector::{Embedder, EmbedderOptions, EmbeddingConfigs};
 use meilisearch_types::milli::{self, CboRoaringBitmapCodec, Index, RoaringBitmapCodec, BEU32};
 use meilisearch_types::task_view::TaskView;
-use meilisearch_types::tasks::{Kind, KindWithContent, Status, Task, TaskProgress};
+use meilisearch_types::tasks::{Kind, KindWithContent, Status, Task};
+use processing::ProcessingTasks;
 use rayon::current_num_threads;
 use rayon::prelude::{IntoParallelIterator, ParallelIterator};
 use roaring::RoaringBitmap;
@@ -72,7 +73,8 @@ use utils::{filter_out_references_to_newer_tasks, keep_ids_within_datetimes, map
 use uuid::Uuid;
 
 use crate::index_mapper::IndexMapper;
-use crate::utils::{check_index_swap_validity, clamp_to_page_size, ProcessingBatch};
+use crate::processing::{AtomicTaskStep, BatchProgress};
+use crate::utils::{check_index_swap_validity, clamp_to_page_size};
 
 pub(crate) type BEI128 = I128<BE>;
 
@@ -163,48 +165,6 @@ impl Query {
     }
 }
 
-#[derive(Debug, Clone)]
-pub struct ProcessingTasks {
-    batch: Option<ProcessingBatch>,
-    /// The list of tasks ids that are currently running.
-    processing: RoaringBitmap,
-    /// The progress on processing tasks
-    progress: Option<TaskProgress>,
-}
-
-impl ProcessingTasks {
-    /// Creates an empty `ProcessingAt` struct.
-    fn new() -> ProcessingTasks {
-        ProcessingTasks { batch: None, processing: RoaringBitmap::new(), progress: None }
-    }
-
-    /// Stores the currently processing tasks, and the date time at which it started.
-    fn start_processing(&mut self, processing_batch: ProcessingBatch, processing: RoaringBitmap) {
-        self.batch = Some(processing_batch);
-        self.processing = processing;
-    }
-
-    fn update_progress(&mut self, progress: Progress) -> TaskProgress {
-        self.progress.get_or_insert_with(TaskProgress::default).update(progress)
-    }
-
-    /// Set the processing tasks to an empty list
-    fn stop_processing(&mut self) -> Self {
-        self.progress = None;
-
-        Self {
-            batch: std::mem::take(&mut self.batch),
-            processing: std::mem::take(&mut self.processing),
-            progress: None,
-        }
-    }
-
-    /// Returns `true` if there, at least, is one task that is currently processing that we must stop.
-    fn must_cancel_processing_tasks(&self, canceled_tasks: &RoaringBitmap) -> bool {
-        !self.processing.is_disjoint(canceled_tasks)
-    }
-}
-
 #[derive(Default, Clone, Debug)]
 struct MustStopProcessing(Arc<AtomicBool>);
 
@@ -813,7 +773,7 @@ impl IndexScheduler {
             let mut batch_tasks = RoaringBitmap::new();
             for batch_uid in batch_uids {
                 if processing_batch.as_ref().map_or(false, |batch| batch.uid == *batch_uid) {
-                    batch_tasks |= &processing_tasks;
+                    batch_tasks |= &*processing_tasks;
                 } else {
                     batch_tasks |= self.tasks_in_batch(rtxn, *batch_uid)?;
                 }
@@ -827,13 +787,13 @@ impl IndexScheduler {
                 match status {
                     // special case for Processing tasks
                     Status::Processing => {
-                        status_tasks |= &processing_tasks;
+                        status_tasks |= &*processing_tasks;
                     }
                     status => status_tasks |= &self.get_status(rtxn, *status)?,
                 };
             }
             if !status.contains(&Status::Processing) {
-                tasks -= &processing_tasks;
+                tasks -= &*processing_tasks;
             }
             tasks &= status_tasks;
         }
@@ -882,7 +842,7 @@ impl IndexScheduler {
         // Once we have filtered the two subsets, we put them back together and assign it back to `tasks`.
         tasks = {
             let (mut filtered_non_processing_tasks, mut filtered_processing_tasks) =
-                (&tasks - &processing_tasks, &tasks & &processing_tasks);
+                (&tasks - &*processing_tasks, &tasks & &*processing_tasks);
 
             // special case for Processing tasks
             // A closure that clears the filtered_processing_tasks if their started_at date falls outside the given bounds
@@ -1090,7 +1050,7 @@ impl IndexScheduler {
         // Once we have filtered the two subsets, we put them back together and assign it back to `batches`.
         batches = {
             let (mut filtered_non_processing_batches, mut filtered_processing_batches) =
-                (&batches - &processing.processing, &batches & &processing.processing);
+                (&batches - &*processing.processing, &batches & &*processing.processing);
 
             // special case for Processing batches
             // A closure that clears the filtered_processing_batches if their started_at date falls outside the given bounds
@@ -1606,7 +1566,8 @@ impl IndexScheduler {
 
         // We reset the must_stop flag to be sure that we don't stop processing tasks
         self.must_stop_processing.reset();
-        self.processing_tasks
+        let progress = self
+            .processing_tasks
             .write()
             .unwrap()
             // We can clone the processing batch here because we don't want its modification to affect the view of the processing batches
@@ -1619,11 +1580,12 @@ impl IndexScheduler {
         let res = {
             let cloned_index_scheduler = self.private_clone();
             let processing_batch = &mut processing_batch;
+            let progress = progress.clone();
             std::thread::scope(|s| {
                 let handle = std::thread::Builder::new()
                     .name(String::from("batch-operation"))
                     .spawn_scoped(s, move || {
-                        cloned_index_scheduler.process_batch(batch, processing_batch)
+                        cloned_index_scheduler.process_batch(batch, processing_batch, progress)
                     })
                     .unwrap();
                 handle.join().unwrap_or(Err(Error::ProcessBatchPanicked))
@@ -1636,6 +1598,7 @@ impl IndexScheduler {
         #[cfg(test)]
         self.maybe_fail(tests::FailureLocation::AcquiringWtxn)?;
 
+        progress.update_progress(BatchProgress::WritingTasksToDisk);
         processing_batch.finished();
         let mut wtxn = self.env.write_txn().map_err(Error::HeedTransaction)?;
         let mut canceled = RoaringBitmap::new();
@@ -1645,12 +1608,15 @@ impl IndexScheduler {
                 #[cfg(test)]
                 self.breakpoint(Breakpoint::ProcessBatchSucceeded);
 
+                let (task_progress, task_progress_obj) = AtomicTaskStep::new(tasks.len() as u32);
+                progress.update_progress(task_progress_obj);
                 let mut success = 0;
                 let mut failure = 0;
                 let mut canceled_by = None;
 
                 #[allow(unused_variables)]
                 for (i, mut task) in tasks.into_iter().enumerate() {
+                    task_progress.fetch_add(1, Ordering::Relaxed);
                     processing_batch.update(&mut task);
                     if task.status == Status::Canceled {
                         canceled.insert(task.uid);
@@ -1678,9 +1644,10 @@ impl IndexScheduler {
                 tracing::info!("A batch of tasks was successfully completed with {success} successful tasks and {failure} failed tasks.");
             }
             // If we have an abortion error we must stop the tick here and re-schedule tasks.
-            Err(Error::Milli(milli::Error::InternalError(
+            Err(Error::Milli {
-                milli::InternalError::AbortedIndexation,
+                error: milli::Error::InternalError(milli::InternalError::AbortedIndexation),
-            )))
+                ..
+            })
             | Err(Error::AbortedTask) => {
                 #[cfg(test)]
                 self.breakpoint(Breakpoint::AbortedIndexation);
@@ -1699,9 +1666,10 @@ impl IndexScheduler {
             // 2. close the associated environment
             // 3. resize it
             // 4. re-schedule tasks
-            Err(Error::Milli(milli::Error::UserError(
+            Err(Error::Milli {
-                milli::UserError::MaxDatabaseSizeReached,
+                error: milli::Error::UserError(milli::UserError::MaxDatabaseSizeReached),
-            ))) if index_uid.is_some() => {
+                ..
+            }) if index_uid.is_some() => {
                 // fixme: add index_uid to match to avoid the unwrap
                 let index_uid = index_uid.unwrap();
                 // fixme: handle error more gracefully? not sure when this could happen
@@ -1716,8 +1684,12 @@ impl IndexScheduler {
             Err(err) => {
                 #[cfg(test)]
                 self.breakpoint(Breakpoint::ProcessBatchFailed);
+                let (task_progress, task_progress_obj) = AtomicTaskStep::new(ids.len() as u32);
+                progress.update_progress(task_progress_obj);
+
                 let error: ResponseError = err.into();
                 for id in ids.iter() {
+                    task_progress.fetch_add(1, Ordering::Relaxed);
                     let mut task = self
                         .get_task(&wtxn, id)
                         .map_err(|e| Error::TaskDatabaseUpdate(Box::new(e)))?
@@ -1943,6 +1915,7 @@ impl IndexScheduler {
     // TODO: consider using a type alias or a struct embedder/template
     pub fn embedders(
         &self,
+        index_uid: String,
         embedding_configs: Vec<IndexEmbeddingConfig>,
     ) -> Result<EmbeddingConfigs> {
         let res: Result<_> = embedding_configs
@@ -1953,8 +1926,12 @@ impl IndexScheduler {
                      config: milli::vector::EmbeddingConfig { embedder_options, prompt, quantized },
                      ..
                  }| {
-                    let prompt =
+                    let prompt = Arc::new(
-                        Arc::new(prompt.try_into().map_err(meilisearch_types::milli::Error::from)?);
+                        prompt
+                            .try_into()
+                            .map_err(meilisearch_types::milli::Error::from)
+                            .map_err(|err| Error::from_milli(err, Some(index_uid.clone())))?,
+                    );
                     // optimistically return existing embedder
                     {
                         let embedders = self.embedders.read().unwrap();
@@ -1970,7 +1947,9 @@ impl IndexScheduler {
                     let embedder = Arc::new(
                         Embedder::new(embedder_options.clone())
                             .map_err(meilisearch_types::milli::vector::Error::from)
-                            .map_err(meilisearch_types::milli::Error::from)?,
+                            .map_err(|err| {
+                                Error::from_milli(err.into(), Some(index_uid.clone()))
+                            })?,
                     );
                     {
                         let mut embedders = self.embedders.write().unwrap();
@@ -4319,10 +4298,35 @@ mod tests {
         let proc = index_scheduler.processing_tasks.read().unwrap().clone();
 
         let query = Query { statuses: Some(vec![Status::Processing]), ..Default::default() };
-        let (batches, _) = index_scheduler
+        let (mut batches, _) = index_scheduler
-            .get_batch_ids_from_authorized_indexes(&rtxn, &proc, &query, &AuthFilter::default())
+            .get_batches_from_authorized_indexes(query.clone(), &AuthFilter::default())
             .unwrap();
-        snapshot!(snapshot_bitmap(&batches), @"[0,]"); // only the processing batch in the first tick
+        assert_eq!(batches.len(), 1);
+        batches[0].started_at = OffsetDateTime::UNIX_EPOCH;
+        // Insta cannot snapshot our batches because the batch stats contains an enum as key: https://github.com/mitsuhiko/insta/issues/689
+        let batch = serde_json::to_string_pretty(&batches[0]).unwrap();
+        snapshot!(batch, @r#"
+        {
+          "uid": 0,
+          "details": {
+            "primaryKey": "mouse"
+          },
+          "stats": {
+            "totalNbTasks": 1,
+            "status": {
+              "processing": 1
+            },
+            "types": {
+              "indexCreation": 1
+            },
+            "indexUids": {
+              "catto": 1
+            }
+          },
+          "startedAt": "1970-01-01T00:00:00Z",
+          "finishedAt": null
+        }
+        "#);
 
         let query = Query { statuses: Some(vec![Status::Enqueued]), ..Default::default() };
         let (batches, _) = index_scheduler
@@ -6146,7 +6150,7 @@ mod tests {
             insta::assert_json_snapshot!(simple_hf_config.embedder_options);
             let simple_hf_name = name.clone();
 
-            let configs = index_scheduler.embedders(configs).unwrap();
+            let configs = index_scheduler.embedders("doggos".to_string(), configs).unwrap();
             let (hf_embedder, _, _) = configs.get(&simple_hf_name).unwrap();
             let beagle_embed =
                 hf_embedder.embed_one(S("Intel the beagle best doggo"), None).unwrap();

crates/index-scheduler/src/processing.rs

@@ -0,0 +1,316 @@
+use std::borrow::Cow;
+use std::sync::Arc;
+
+use enum_iterator::Sequence;
+use meilisearch_types::milli::progress::{AtomicSubStep, NamedStep, Progress, ProgressView, Step};
+use meilisearch_types::milli::{make_atomic_progress, make_enum_progress};
+use roaring::RoaringBitmap;
+
+use crate::utils::ProcessingBatch;
+
+#[derive(Clone)]
+pub struct ProcessingTasks {
+    pub batch: Option<Arc<ProcessingBatch>>,
+    /// The list of tasks ids that are currently running.
+    pub processing: Arc<RoaringBitmap>,
+    /// The progress on processing tasks
+    pub progress: Option<Progress>,
+}
+
+impl ProcessingTasks {
+    /// Creates an empty `ProcessingAt` struct.
+    pub fn new() -> ProcessingTasks {
+        ProcessingTasks { batch: None, processing: Arc::new(RoaringBitmap::new()), progress: None }
+    }
+
+    pub fn get_progress_view(&self) -> Option<ProgressView> {
+        Some(self.progress.as_ref()?.as_progress_view())
+    }
+
+    /// Stores the currently processing tasks, and the date time at which it started.
+    pub fn start_processing(
+        &mut self,
+        processing_batch: ProcessingBatch,
+        processing: RoaringBitmap,
+    ) -> Progress {
+        self.batch = Some(Arc::new(processing_batch));
+        self.processing = Arc::new(processing);
+        let progress = Progress::default();
+        progress.update_progress(BatchProgress::ProcessingTasks);
+        self.progress = Some(progress.clone());
+
+        progress
+    }
+
+    /// Set the processing tasks to an empty list
+    pub fn stop_processing(&mut self) -> Self {
+        self.progress = None;
+
+        Self {
+            batch: std::mem::take(&mut self.batch),
+            processing: std::mem::take(&mut self.processing),
+            progress: None,
+        }
+    }
+
+    /// Returns `true` if there, at least, is one task that is currently processing that we must stop.
+    pub fn must_cancel_processing_tasks(&self, canceled_tasks: &RoaringBitmap) -> bool {
+        !self.processing.is_disjoint(canceled_tasks)
+    }
+}
+
+make_enum_progress! {
+    pub enum BatchProgress {
+        ProcessingTasks,
+        WritingTasksToDisk,
+    }
+}
+
+make_enum_progress! {
+    pub enum TaskCancelationProgress {
+        RetrievingTasks,
+        UpdatingTasks,
+    }
+}
+
+make_enum_progress! {
+    pub enum TaskDeletionProgress {
+        DeletingTasksDateTime,
+        DeletingTasksMetadata,
+        DeletingTasks,
+        DeletingBatches,
+    }
+}
+
+make_enum_progress! {
+    pub enum SnapshotCreationProgress {
+        StartTheSnapshotCreation,
+        SnapshotTheIndexScheduler,
+        SnapshotTheUpdateFiles,
+        SnapshotTheIndexes,
+        SnapshotTheApiKeys,
+        CreateTheTarball,
+    }
+}
+
+make_enum_progress! {
+    pub enum DumpCreationProgress {
+        StartTheDumpCreation,
+        DumpTheApiKeys,
+        DumpTheTasks,
+        DumpTheIndexes,
+        DumpTheExperimentalFeatures,
+        CompressTheDump,
+    }
+}
+
+make_enum_progress! {
+    pub enum CreateIndexProgress {
+        CreatingTheIndex,
+    }
+}
+
+make_enum_progress! {
+    pub enum UpdateIndexProgress {
+        UpdatingTheIndex,
+    }
+}
+
+make_enum_progress! {
+    pub enum DeleteIndexProgress {
+        DeletingTheIndex,
+    }
+}
+
+make_enum_progress! {
+    pub enum SwappingTheIndexes {
+        EnsuringCorrectnessOfTheSwap,
+        SwappingTheIndexes,
+    }
+}
+
+make_enum_progress! {
+    pub enum InnerSwappingTwoIndexes {
+        RetrieveTheTasks,
+        UpdateTheTasks,
+        UpdateTheIndexesMetadata,
+    }
+}
+
+make_enum_progress! {
+    pub enum DocumentOperationProgress {
+        RetrievingConfig,
+        ComputingDocumentChanges,
+        Indexing,
+    }
+}
+
+make_enum_progress! {
+    pub enum DocumentEditionProgress {
+        RetrievingConfig,
+        ComputingDocumentChanges,
+        Indexing,
+    }
+}
+
+make_enum_progress! {
+    pub enum DocumentDeletionProgress {
+        RetrievingConfig,
+        DeleteDocuments,
+        Indexing,
+    }
+}
+
+make_enum_progress! {
+    pub enum SettingsProgress {
+        RetrievingAndMergingTheSettings,
+        ApplyTheSettings,
+    }
+}
+
+make_atomic_progress!(Task alias AtomicTaskStep => "task" );
+make_atomic_progress!(Document alias AtomicDocumentStep => "document" );
+make_atomic_progress!(Batch alias AtomicBatchStep => "batch" );
+make_atomic_progress!(UpdateFile alias AtomicUpdateFileStep => "update file" );
+
+pub struct VariableNameStep {
+    name: String,
+    current: u32,
+    total: u32,
+}
+
+impl VariableNameStep {
+    pub fn new(name: impl Into<String>, current: u32, total: u32) -> Self {
+        Self { name: name.into(), current, total }
+    }
+}
+
+impl Step for VariableNameStep {
+    fn name(&self) -> Cow<'static, str> {
+        self.name.clone().into()
+    }
+
+    fn current(&self) -> u32 {
+        self.current
+    }
+
+    fn total(&self) -> u32 {
+        self.total
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use std::sync::atomic::Ordering;
+
+    use meili_snap::{json_string, snapshot};
+
+    use super::*;
+
+    #[test]
+    fn one_level() {
+        let mut processing = ProcessingTasks::new();
+        processing.start_processing(ProcessingBatch::new(0), RoaringBitmap::new());
+        snapshot!(json_string!(processing.get_progress_view()), @r#"
+        {
+          "steps": [
+            {
+              "currentStep": "processing tasks",
+              "finished": 0,
+              "total": 2
+            }
+          ],
+          "percentage": 0.0
+        }
+        "#);
+        processing.progress.as_ref().unwrap().update_progress(BatchProgress::WritingTasksToDisk);
+        snapshot!(json_string!(processing.get_progress_view()), @r#"
+        {
+          "steps": [
+            {
+              "currentStep": "writing tasks to disk",
+              "finished": 1,
+              "total": 2
+            }
+          ],
+          "percentage": 50.0
+        }
+        "#);
+    }
+
+    #[test]
+    fn task_progress() {
+        let mut processing = ProcessingTasks::new();
+        processing.start_processing(ProcessingBatch::new(0), RoaringBitmap::new());
+        let (atomic, tasks) = AtomicTaskStep::new(10);
+        processing.progress.as_ref().unwrap().update_progress(tasks);
+        snapshot!(json_string!(processing.get_progress_view()), @r#"
+        {
+          "steps": [
+            {
+              "currentStep": "processing tasks",
+              "finished": 0,
+              "total": 2
+            },
+            {
+              "currentStep": "task",
+              "finished": 0,
+              "total": 10
+            }
+          ],
+          "percentage": 0.0
+        }
+        "#);
+        atomic.fetch_add(6, Ordering::Relaxed);
+        snapshot!(json_string!(processing.get_progress_view()), @r#"
+        {
+          "steps": [
+            {
+              "currentStep": "processing tasks",
+              "finished": 0,
+              "total": 2
+            },
+            {
+              "currentStep": "task",
+              "finished": 6,
+              "total": 10
+            }
+          ],
+          "percentage": 30.000002
+        }
+        "#);
+        processing.progress.as_ref().unwrap().update_progress(BatchProgress::WritingTasksToDisk);
+        snapshot!(json_string!(processing.get_progress_view()), @r#"
+        {
+          "steps": [
+            {
+              "currentStep": "writing tasks to disk",
+              "finished": 1,
+              "total": 2
+            }
+          ],
+          "percentage": 50.0
+        }
+        "#);
+        let (atomic, tasks) = AtomicTaskStep::new(5);
+        processing.progress.as_ref().unwrap().update_progress(tasks);
+        atomic.fetch_add(4, Ordering::Relaxed);
+        snapshot!(json_string!(processing.get_progress_view()), @r#"
+        {
+          "steps": [
+            {
+              "currentStep": "writing tasks to disk",
+              "finished": 1,
+              "total": 2
+            },
+            {
+              "currentStep": "task",
+              "finished": 4,
+              "total": 5
+            }
+          ],
+          "percentage": 90.0
+        }
+        "#);
+    }
+}

crates/index-scheduler/src/snapshots/lib.rs/cancel_mix_of_tasks/aborted_indexation.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(1):
 [1,]
-{uid: 1, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"beavero":2}}, }
+{uid: 1, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"beavero":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, batch_uid: 0, status: succeeded, details: { received_documents: 1, indexed_documents: Some(1) }, kind: DocumentAdditionOrUpdate { index_uid: "catto", primary_key: None, method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/cancel_mix_of_tasks/processing_second_task_cancel_enqueued.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(1):
 [1,]
-{uid: 1, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"beavero":2}}, }
+{uid: 1, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"beavero":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, batch_uid: 0, status: succeeded, details: { received_documents: 1, indexed_documents: Some(1) }, kind: DocumentAdditionOrUpdate { index_uid: "catto", primary_key: None, method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/cancel_processing_dump/cancel_registered.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"dumpUid":null}, stats: {"totalNbTasks":1,"status":{"enqueued":1},"types":{"dumpCreation":1},"indexUids":{}}, }
+{uid: 0, details: {"dumpUid":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"dumpCreation":1},"indexUids":{}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { dump_uid: None }, kind: DumpCreation { keys: [], instance_uid: None }}

crates/index-scheduler/src/snapshots/lib.rs/cancel_processing_task/aborted_indexation.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"catto":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"catto":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "catto", primary_key: None, method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/cancel_processing_task/cancel_task_registered.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"catto":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"catto":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "catto", primary_key: None, method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/cancel_processing_task/initial_task_processing.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"catto":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"catto":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "catto", primary_key: None, method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/document_addition/after_the_batch_creation.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"doggos":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"doggos":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "doggos", primary_key: Some("id"), method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/fail_in_process_batch_for_document_addition/document_addition_batch_created.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"doggos":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"doggos":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "doggos", primary_key: Some("id"), method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/fail_in_process_batch_for_document_deletion/after_removing_the_documents.snap

@@ -9,8 +9,8 @@ source: crates/index-scheduler/src/lib.rs
 0 {uid: 0, batch_uid: 0, status: succeeded, details: { settings: Settings { displayed_attributes: WildcardSetting(NotSet), searchable_attributes: WildcardSetting(NotSet), filterable_attributes: Set({"catto"}), sortable_attributes: NotSet, ranking_rules: NotSet, stop_words: NotSet, non_separator_tokens: NotSet, separator_tokens: NotSet, dictionary: NotSet, synonyms: NotSet, distinct_attribute: NotSet, proximity_precision: NotSet, typo_tolerance: NotSet, faceting: NotSet, pagination: NotSet, embedders: NotSet, search_cutoff_ms: NotSet, localized_attributes: NotSet, facet_search: NotSet, prefix_search: NotSet, _kind: PhantomData<meilisearch_types::settings::Unchecked> } }, kind: SettingsUpdate { index_uid: "doggos", new_settings: Settings { displayed_attributes: WildcardSetting(NotSet), searchable_attributes: WildcardSetting(NotSet), filterable_attributes: Set({"catto"}), sortable_attributes: NotSet, ranking_rules: NotSet, stop_words: NotSet, non_separator_tokens: NotSet, separator_tokens: NotSet, dictionary: NotSet, synonyms: NotSet, distinct_attribute: NotSet, proximity_precision: NotSet, typo_tolerance: NotSet, faceting: NotSet, pagination: NotSet, embedders: NotSet, search_cutoff_ms: NotSet, localized_attributes: NotSet, facet_search: NotSet, prefix_search: NotSet, _kind: PhantomData<meilisearch_types::settings::Unchecked> }, is_deletion: false, allow_index_creation: true }}
 1 {uid: 1, batch_uid: 1, status: succeeded, details: { received_documents: 3, indexed_documents: Some(3) }, kind: DocumentAdditionOrUpdate { index_uid: "doggos", primary_key: Some("id"), method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 3, allow_index_creation: true }}
 2 {uid: 2, batch_uid: 2, status: succeeded, details: { received_document_ids: 1, deleted_documents: Some(1) }, kind: DocumentDeletion { index_uid: "doggos", documents_ids: ["1"] }}
-3 {uid: 3, batch_uid: 2, status: failed, error: ResponseError { code: 200, message: "Invalid type for filter subexpression: expected: String, Array, found: true.", error_code: "invalid_document_filter", error_type: "invalid_request", error_link: "https://docs.meilisearch.com/errors#invalid_document_filter" }, details: { original_filter: true, deleted_documents: Some(0) }, kind: DocumentDeletionByFilter { index_uid: "doggos", filter_expr: Bool(true) }}
+3 {uid: 3, batch_uid: 2, status: failed, error: ResponseError { code: 200, message: "Index `doggos`: Invalid type for filter subexpression: expected: String, Array, found: true.", error_code: "invalid_document_filter", error_type: "invalid_request", error_link: "https://docs.meilisearch.com/errors#invalid_document_filter" }, details: { original_filter: true, deleted_documents: Some(0) }, kind: DocumentDeletionByFilter { index_uid: "doggos", filter_expr: Bool(true) }}
-4 {uid: 4, batch_uid: 2, status: failed, error: ResponseError { code: 200, message: "Attribute `id` is not filterable. Available filterable attributes are: `catto`.\n1:3 id = 2", error_code: "invalid_document_filter", error_type: "invalid_request", error_link: "https://docs.meilisearch.com/errors#invalid_document_filter" }, details: { original_filter: "id = 2", deleted_documents: Some(0) }, kind: DocumentDeletionByFilter { index_uid: "doggos", filter_expr: String("id = 2") }}
+4 {uid: 4, batch_uid: 2, status: failed, error: ResponseError { code: 200, message: "Index `doggos`: Attribute `id` is not filterable. Available filterable attributes are: `catto`.\n1:3 id = 2", error_code: "invalid_document_filter", error_type: "invalid_request", error_link: "https://docs.meilisearch.com/errors#invalid_document_filter" }, details: { original_filter: "id = 2", deleted_documents: Some(0) }, kind: DocumentDeletionByFilter { index_uid: "doggos", filter_expr: String("id = 2") }}
 5 {uid: 5, batch_uid: 2, status: succeeded, details: { original_filter: "catto EXISTS", deleted_documents: Some(1) }, kind: DocumentDeletionByFilter { index_uid: "doggos", filter_expr: String("catto EXISTS") }}
 ----------------------------------------------------------------------
 ### Status:

crates/index-scheduler/src/snapshots/lib.rs/fail_in_update_task_after_process_batch_success_for_document_addition/after_batch_succeeded.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"doggos":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"doggos":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "doggos", primary_key: Some("id"), method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/fail_in_update_task_after_process_batch_success_for_document_addition/after_failing_to_commit.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"receivedDocuments":2,"indexedDocuments":null}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"documentAdditionOrUpdate":2},"indexUids":{"doggos":2}}, }
+{uid: 0, details: {"receivedDocuments":1,"indexedDocuments":null}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"documentAdditionOrUpdate":1},"indexUids":{"doggos":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { received_documents: 1, indexed_documents: None }, kind: DocumentAdditionOrUpdate { index_uid: "doggos", primary_key: Some("id"), method: ReplaceDocuments, content_file: 00000000-0000-0000-0000-000000000000, documents_count: 1, allow_index_creation: true }}

crates/index-scheduler/src/snapshots/lib.rs/insert_task_while_another_task_is_processing/after_batch_creation.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"primaryKey":"id"}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"indexCreation":2},"indexUids":{"index_a":2}}, }
+{uid: 0, details: {"primaryKey":"id"}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"indexCreation":1},"indexUids":{"index_a":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { primary_key: Some("id") }, kind: IndexCreation { index_uid: "index_a", primary_key: Some("id") }}

crates/index-scheduler/src/snapshots/lib.rs/insert_task_while_another_task_is_processing/registered_the_second_task.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"primaryKey":"id"}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"indexCreation":2},"indexUids":{"index_a":2}}, }
+{uid: 0, details: {"primaryKey":"id"}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"indexCreation":1},"indexUids":{"index_a":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { primary_key: Some("id") }, kind: IndexCreation { index_uid: "index_a", primary_key: Some("id") }}

crates/index-scheduler/src/snapshots/lib.rs/insert_task_while_another_task_is_processing/registered_the_third_task.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [0,]
-{uid: 0, details: {"primaryKey":"id"}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"indexCreation":2},"indexUids":{"index_a":2}}, }
+{uid: 0, details: {"primaryKey":"id"}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"indexCreation":1},"indexUids":{"index_a":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { primary_key: Some("id") }, kind: IndexCreation { index_uid: "index_a", primary_key: Some("id") }}

crates/index-scheduler/src/snapshots/lib.rs/query_batches_simple/after-advancing-a-bit.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(1):
 [1,]
-{uid: 1, details: {"primaryKey":"sheep"}, stats: {"totalNbTasks":2,"status":{"enqueued":2},"types":{"indexCreation":2},"indexUids":{"doggo":2}}, }
+{uid: 1, details: {"primaryKey":"sheep"}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"indexCreation":1},"indexUids":{"doggo":1}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, batch_uid: 0, status: succeeded, details: { primary_key: Some("mouse") }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}

crates/index-scheduler/src/snapshots/lib.rs/task_deletion_undeleteable/task_deletion_processing.snap

@@ -5,7 +5,7 @@ snapshot_kind: text
 ### Autobatching Enabled = true
 ### Processing batch Some(0):
 [3,]
-{uid: 0, details: {"matchedTasks":2,"deletedTasks":null,"originalFilter":"test_query"}, stats: {"totalNbTasks":1,"status":{"enqueued":1},"types":{"taskDeletion":1},"indexUids":{}}, }
+{uid: 0, details: {"matchedTasks":2,"deletedTasks":null,"originalFilter":"test_query"}, stats: {"totalNbTasks":1,"status":{"processing":1},"types":{"taskDeletion":1},"indexUids":{}}, }
 ----------------------------------------------------------------------
 ### All Tasks:
 0 {uid: 0, status: enqueued, details: { primary_key: Some("mouse") }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}

crates/index-scheduler/src/utils.rs

@@ -67,7 +67,7 @@ impl ProcessingBatch {
             task.batch_uid = Some(self.uid);
             // We don't store the statuses in the map since they're all enqueued but we must
             // still store them in the stats since that can be displayed.
-            *self.stats.status.entry(task.status).or_default() += 1;
+            *self.stats.status.entry(Status::Processing).or_default() += 1;
 
             self.kinds.insert(task.kind.as_kind());
             *self.stats.types.entry(task.kind.as_kind()).or_default() += 1;
@@ -134,6 +134,7 @@ impl ProcessingBatch {
     pub fn to_batch(&self) -> Batch {
         Batch {
             uid: self.uid,
+            progress: None,
             details: self.details.clone(),
             stats: self.stats.clone(),
             started_at: self.started_at,
@@ -187,6 +188,7 @@ impl IndexScheduler {
             &batch.uid,
             &Batch {
                 uid: batch.uid,
+                progress: None,
                 details: batch.details,
                 stats: batch.stats,
                 started_at: batch.started_at,
@@ -273,7 +275,9 @@ impl IndexScheduler {
             .into_iter()
             .map(|batch_id| {
                 if Some(batch_id) == processing.batch.as_ref().map(|batch| batch.uid) {
-                    Ok(processing.batch.as_ref().unwrap().to_batch())
+                    let mut batch = processing.batch.as_ref().unwrap().to_batch();
+                    batch.progress = processing.get_progress_view();
+                    Ok(batch)
                 } else {
                     self.get_batch(rtxn, batch_id)
                         .and_then(|task| task.ok_or(Error::CorruptedTaskQueue))
@@ -287,7 +291,10 @@ impl IndexScheduler {
 
         debug_assert!(old_task != *task);
         debug_assert_eq!(old_task.uid, task.uid);
-        debug_assert!(old_task.batch_uid.is_none() && task.batch_uid.is_some());
+        debug_assert!(
+            old_task.batch_uid.is_none() && task.batch_uid.is_some(),
+            "\n==> old: {old_task:?}\n==> new: {task:?}"
+        );
 
         if old_task.status != task.status {
             self.update_status(wtxn, old_task.status, |bitmap| {

crates/meilisearch-types/Cargo.toml

@@ -24,8 +24,9 @@ flate2 = "1.0.30"
 fst = "0.4.7"
 memmap2 = "0.9.4"
 milli = { path = "../milli" }
-raw-collections = { git = "https://github.com/meilisearch/raw-collections.git", version = "0.1.0" }
+bumparaw-collections = "0.1.2"
 roaring = { version = "0.10.7", features = ["serde"] }
+rustc-hash = "2.1.0"
 serde = { version = "1.0.204", features = ["derive"] }
 serde-cs = "0.2.4"
 serde_json = "1.0.120"

crates/meilisearch-types/src/batch_view.rs

@@ -1,16 +1,16 @@
+use milli::progress::ProgressView;
 use serde::Serialize;
 use time::{Duration, OffsetDateTime};
 
-use crate::{
+use crate::batches::{Batch, BatchId, BatchStats};
-    batches::{Batch, BatchId, BatchStats},
+use crate::task_view::DetailsView;
-    task_view::DetailsView,
+use crate::tasks::serialize_duration;
-    tasks::serialize_duration,
-};
 
 #[derive(Debug, Clone, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct BatchView {
     pub uid: BatchId,
+    pub progress: Option<ProgressView>,
     pub details: DetailsView,
     pub stats: BatchStats,
     #[serde(serialize_with = "serialize_duration", default)]
@@ -25,6 +25,7 @@ impl BatchView {
     pub fn from_batch(batch: &Batch) -> Self {
         Self {
             uid: batch.uid,
+            progress: batch.progress.clone(),
             details: batch.details.clone(),
             stats: batch.stats.clone(),
             duration: batch.finished_at.map(|finished_at| finished_at - batch.started_at),

crates/meilisearch-types/src/batches.rs

@@ -1,12 +1,11 @@
 use std::collections::BTreeMap;
 
+use milli::progress::ProgressView;
 use serde::{Deserialize, Serialize};
 use time::OffsetDateTime;
 
-use crate::{
+use crate::task_view::DetailsView;
-    task_view::DetailsView,
+use crate::tasks::{Kind, Status};
-    tasks::{Kind, Status},
-};
 
 pub type BatchId = u32;
 
@@ -15,6 +14,8 @@ pub type BatchId = u32;
 pub struct Batch {
     pub uid: BatchId,
 
+    #[serde(skip)]
+    pub progress: Option<ProgressView>,
     pub details: DetailsView,
     pub stats: BatchStats,
 

crates/meilisearch-types/src/document_formats.rs

@@ -4,10 +4,11 @@ use std::io::{self, BufWriter};
 use std::marker::PhantomData;
 
 use bumpalo::Bump;
+use bumparaw_collections::RawMap;
 use memmap2::Mmap;
 use milli::documents::Error;
 use milli::Object;
-use raw_collections::RawMap;
+use rustc_hash::FxBuildHasher;
 use serde::de::{SeqAccess, Visitor};
 use serde::{Deserialize, Deserializer};
 use serde_json::error::Category;
@@ -220,7 +221,7 @@ pub fn read_json(input: &File, output: impl io::Write) -> Result<u64> {
     let mut deserializer = serde_json::Deserializer::from_slice(&input);
     let res = array_each(&mut deserializer, |obj: &RawValue| {
         doc_alloc.reset();
-        let map = RawMap::from_raw_value(obj, &doc_alloc)?;
+        let map = RawMap::from_raw_value_and_hasher(obj, FxBuildHasher, &doc_alloc)?;
         to_writer(&mut out, &map)
     });
     let count = match res {
@@ -250,26 +251,25 @@ pub fn read_json(input: &File, output: impl io::Write) -> Result<u64> {
     }
 }
 
-/// Reads NDJSON from file and write it in NDJSON in a file checking it along the way.
+/// Reads NDJSON from file and checks it.
-pub fn read_ndjson(input: &File, output: impl io::Write) -> Result<u64> {
+pub fn read_ndjson(input: &File) -> Result<u64> {
     // We memory map to be able to deserialize into a RawMap that
     // does not allocate when possible and only materialize the first/top level.
     let input = unsafe { Mmap::map(input).map_err(DocumentFormatError::Io)? };
-    let mut output = BufWriter::new(output);
-
     let mut bump = Bump::with_capacity(1024 * 1024);
 
     let mut count = 0;
     for result in serde_json::Deserializer::from_slice(&input).into_iter() {
         bump.reset();
-        count += 1;
+        match result {
-        result
+            Ok(raw) => {
-            .and_then(|raw: &RawValue| {
                 // try to deserialize as a map
-                let map = RawMap::from_raw_value(raw, &bump)?;
+                RawMap::from_raw_value_and_hasher(raw, FxBuildHasher, &bump)
-                to_writer(&mut output, &map)
+                    .map_err(|e| DocumentFormatError::from((PayloadType::Ndjson, e)))?;
-            })
+                count += 1;
-            .map_err(|e| DocumentFormatError::from((PayloadType::Ndjson, e)))?;
+            }
+            Err(e) => return Err(DocumentFormatError::from((PayloadType::Ndjson, e))),
+        }
     }
 
     Ok(count)

crates/meilisearch-types/src/error.rs

@@ -279,6 +279,7 @@ InvalidSearchPage                     , InvalidRequest       , BAD_REQUEST ;
 InvalidSearchQ                        , InvalidRequest       , BAD_REQUEST ;
 InvalidFacetSearchQuery               , InvalidRequest       , BAD_REQUEST ;
 InvalidFacetSearchName                , InvalidRequest       , BAD_REQUEST ;
+FacetSearchDisabled                   , InvalidRequest       , BAD_REQUEST ;
 InvalidSearchVector                   , InvalidRequest       , BAD_REQUEST ;
 InvalidSearchShowMatchesPosition      , InvalidRequest       , BAD_REQUEST ;
 InvalidSearchShowRankingScore         , InvalidRequest       , BAD_REQUEST ;
@@ -549,7 +550,7 @@ impl fmt::Display for deserr_codes::InvalidSimilarId {
             "the value of `id` is invalid. \
             A document identifier can be of type integer or string, \
             only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), \
-            and can not be more than 512 bytes."
+            and can not be more than 511 bytes."
         )
     }
 }

crates/meilisearch-types/src/tasks.rs

@@ -4,7 +4,6 @@ use std::fmt::{Display, Write};
 use std::str::FromStr;
 
 use enum_iterator::Sequence;
-use milli::update::new::indexer::document_changes::Progress;
 use milli::update::IndexDocumentsMethod;
 use milli::Object;
 use roaring::RoaringBitmap;
@@ -41,62 +40,6 @@ pub struct Task {
     pub kind: KindWithContent,
 }
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct TaskProgress {
-    pub current_step: &'static str,
-    pub finished_steps: u16,
-    pub total_steps: u16,
-    pub finished_substeps: Option<u32>,
-    pub total_substeps: Option<u32>,
-}
-
-impl Default for TaskProgress {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl TaskProgress {
-    pub fn new() -> Self {
-        Self {
-            current_step: "start",
-            finished_steps: 0,
-            total_steps: 1,
-            finished_substeps: None,
-            total_substeps: None,
-        }
-    }
-
-    pub fn update(&mut self, progress: Progress) -> TaskProgress {
-        if self.finished_steps > progress.finished_steps {
-            return *self;
-        }
-
-        if self.current_step != progress.step_name {
-            self.current_step = progress.step_name
-        }
-
-        self.total_steps = progress.total_steps;
-
-        if self.finished_steps < progress.finished_steps {
-            self.finished_substeps = None;
-            self.total_substeps = None;
-        }
-        self.finished_steps = progress.finished_steps;
-        if let Some((finished_substeps, total_substeps)) = progress.finished_total_substep {
-            if let Some(task_finished_substeps) = self.finished_substeps {
-                if task_finished_substeps > finished_substeps {
-                    return *self;
-                }
-            }
-            self.finished_substeps = Some(finished_substeps);
-            self.total_substeps = Some(total_substeps);
-        }
-        *self
-    }
-}
-
 impl Task {
     pub fn index_uid(&self) -> Option<&str> {
         use KindWithContent::*;

crates/meilisearch/src/error.rs

@@ -4,6 +4,7 @@ use byte_unit::{Byte, UnitType};
 use meilisearch_types::document_formats::{DocumentFormatError, PayloadType};
 use meilisearch_types::error::{Code, ErrorCode, ResponseError};
 use meilisearch_types::index_uid::{IndexUid, IndexUidFormatError};
+use meilisearch_types::milli;
 use meilisearch_types::milli::OrderBy;
 use serde_json::Value;
 use tokio::task::JoinError;
@@ -62,8 +63,11 @@ pub enum MeilisearchHttpError {
     HeedError(#[from] meilisearch_types::heed::Error),
     #[error(transparent)]
     IndexScheduler(#[from] index_scheduler::Error),
-    #[error(transparent)]
+    #[error("{}", match .index_name {
-    Milli(#[from] meilisearch_types::milli::Error),
+        Some(name) if !name.is_empty() => format!("Index `{}`: {error}", name),
+        _ => format!("{error}")
+    })]
+    Milli { error: milli::Error, index_name: Option<String> },
     #[error(transparent)]
     Payload(#[from] PayloadError),
     #[error(transparent)]
@@ -76,6 +80,12 @@ pub enum MeilisearchHttpError {
     MissingSearchHybrid,
 }
 
+impl MeilisearchHttpError {
+    pub(crate) fn from_milli(error: milli::Error, index_name: Option<String>) -> Self {
+        Self::Milli { error, index_name }
+    }
+}
+
 impl ErrorCode for MeilisearchHttpError {
     fn error_code(&self) -> Code {
         match self {
@@ -95,7 +105,7 @@ impl ErrorCode for MeilisearchHttpError {
             MeilisearchHttpError::SerdeJson(_) => Code::Internal,
             MeilisearchHttpError::HeedError(_) => Code::Internal,
             MeilisearchHttpError::IndexScheduler(e) => e.error_code(),
-            MeilisearchHttpError::Milli(e) => e.error_code(),
+            MeilisearchHttpError::Milli { error, .. } => error.error_code(),
             MeilisearchHttpError::Payload(e) => e.error_code(),
             MeilisearchHttpError::FileStore(_) => Code::Internal,
             MeilisearchHttpError::DocumentFormat(e) => e.error_code(),

crates/meilisearch/src/lib.rs

@@ -395,6 +395,7 @@ fn import_dump(
     for index_reader in dump_reader.indexes()? {
         let mut index_reader = index_reader?;
         let metadata = index_reader.metadata();
+        let uid = metadata.uid.clone();
         tracing::info!("Importing index `{}`.", metadata.uid);
 
         let date = Some((metadata.created_at, metadata.updated_at));
@@ -432,7 +433,7 @@ fn import_dump(
         let reader = DocumentsBatchReader::from_reader(reader)?;
 
         let embedder_configs = index.embedding_configs(&wtxn)?;
-        let embedders = index_scheduler.embedders(embedder_configs)?;
+        let embedders = index_scheduler.embedders(uid, embedder_configs)?;
 
         let builder = milli::update::IndexDocuments::new(
             &mut wtxn,

crates/meilisearch/src/main.rs

@@ -129,6 +129,11 @@ async fn try_main() -> anyhow::Result<()> {
 
     print_launch_resume(&opt, analytics.clone(), config_read_from);
 
+    tokio::spawn(async move {
+        tokio::signal::ctrl_c().await.unwrap();
+        std::process::exit(130);
+    });
+
     run_http(index_scheduler, auth_controller, opt, log_handle, Arc::new(analytics)).await?;
 
     Ok(())

crates/meilisearch/src/routes/batches.rs

@@ -1,18 +1,18 @@
-use actix_web::{
+use actix_web::web::{self, Data};
-    web::{self, Data},
+use actix_web::HttpResponse;
-    HttpResponse,
-};
 use deserr::actix_web::AwebQueryParameter;
 use index_scheduler::{IndexScheduler, Query};
-use meilisearch_types::{
+use meilisearch_types::batch_view::BatchView;
-    batch_view::BatchView, batches::BatchId, deserr::DeserrQueryParamError, error::ResponseError,
+use meilisearch_types::batches::BatchId;
-    keys::actions,
+use meilisearch_types::deserr::DeserrQueryParamError;
-};
+use meilisearch_types::error::ResponseError;
+use meilisearch_types::keys::actions;
 use serde::Serialize;
 
-use crate::extractors::{authentication::GuardedData, sequential_extractor::SeqHandler};
+use super::tasks::TasksFilterQuery;
-
+use super::ActionPolicy;
-use super::{tasks::TasksFilterQuery, ActionPolicy};
+use crate::extractors::authentication::GuardedData;
+use crate::extractors::sequential_extractor::SeqHandler;
 
 pub fn configure(cfg: &mut web::ServiceConfig) {
     cfg.service(web::resource("").route(web::get().to(SeqHandler(get_batches))))

crates/meilisearch/src/routes/indexes/documents.rs

@@ -1,5 +1,5 @@
 use std::collections::HashSet;
-use std::io::ErrorKind;
+use std::io::{ErrorKind, Seek as _};
 use std::marker::PhantomData;
 
 use actix_web::http::header::CONTENT_TYPE;
@@ -572,7 +572,7 @@ async fn document_addition(
     index_uid: IndexUid,
     primary_key: Option<String>,
     csv_delimiter: Option<u8>,
-    mut body: Payload,
+    body: Payload,
     method: IndexDocumentsMethod,
     task_id: Option<TaskId>,
     dry_run: bool,
@@ -609,54 +609,60 @@ async fn document_addition(
     };
 
     let (uuid, mut update_file) = index_scheduler.create_update_file(dry_run)?;
+    let documents_count = match format {
+        PayloadType::Ndjson => {
+            let (path, file) = update_file.into_parts();
+            let file = match file {
+                Some(file) => {
+                    let (file, path) = file.into_parts();
+                    let mut file = copy_body_to_file(file, body, format).await?;
+                    file.rewind().map_err(|e| {
+                        index_scheduler::Error::FileStore(file_store::Error::IoError(e))
+                    })?;
+                    Some(tempfile::NamedTempFile::from_parts(file, path))
+                }
+                None => None,
+            };
 
-    let temp_file = match tempfile() {
+            let documents_count = tokio::task::spawn_blocking(move || {
-        Ok(file) => file,
+                let documents_count = file.as_ref().map_or(Ok(0), |ntf| {
-        Err(e) => return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e)))),
+                    read_ndjson(ntf.as_file()).map_err(MeilisearchHttpError::DocumentFormat)
+                })?;
+
+                let update_file = file_store::File::from_parts(path, file);
+                update_file.persist()?;
+
+                Ok(documents_count)
+            })
+            .await?;
+
+            Ok(documents_count)
+        }
+        PayloadType::Json | PayloadType::Csv { delimiter: _ } => {
+            let temp_file = match tempfile() {
+                Ok(file) => file,
+                Err(e) => return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e)))),
+            };
+
+            let read_file = copy_body_to_file(temp_file, body, format).await?;
+            tokio::task::spawn_blocking(move || {
+                let documents_count = match format {
+                    PayloadType::Json => read_json(&read_file, &mut update_file)?,
+                    PayloadType::Csv { delimiter } => {
+                        read_csv(&read_file, &mut update_file, delimiter)?
+                    }
+                    PayloadType::Ndjson => {
+                        unreachable!("We already wrote the user content into the update file")
+                    }
+                };
+                // we NEED to persist the file here because we moved the `udpate_file` in another task.
+                update_file.persist()?;
+                Ok(documents_count)
+            })
+            .await
+        }
     };
 
-    let async_file = File::from_std(temp_file);
-    let mut buffer = BufWriter::new(async_file);
-
-    let mut buffer_write_size: usize = 0;
-    while let Some(result) = body.next().await {
-        let byte = result?;
-
-        if byte.is_empty() && buffer_write_size == 0 {
-            return Err(MeilisearchHttpError::MissingPayload(format));
-        }
-
-        match buffer.write_all(&byte).await {
-            Ok(()) => buffer_write_size += 1,
-            Err(e) => return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e)))),
-        }
-    }
-
-    if let Err(e) = buffer.flush().await {
-        return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e))));
-    }
-
-    if buffer_write_size == 0 {
-        return Err(MeilisearchHttpError::MissingPayload(format));
-    }
-
-    if let Err(e) = buffer.seek(std::io::SeekFrom::Start(0)).await {
-        return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e))));
-    }
-
-    let read_file = buffer.into_inner().into_std().await;
-    let documents_count = tokio::task::spawn_blocking(move || {
-        let documents_count = match format {
-            PayloadType::Json => read_json(&read_file, &mut update_file)?,
-            PayloadType::Csv { delimiter } => read_csv(&read_file, &mut update_file, delimiter)?,
-            PayloadType::Ndjson => read_ndjson(&read_file, &mut update_file)?,
-        };
-        // we NEED to persist the file here because we moved the `udpate_file` in another task.
-        update_file.persist()?;
-        Ok(documents_count)
-    })
-    .await;
-
     let documents_count = match documents_count {
         Ok(Ok(documents_count)) => documents_count,
         // in this case the file has not possibly be persisted.
@@ -703,6 +709,39 @@ async fn document_addition(
     Ok(task.into())
 }
 
+async fn copy_body_to_file(
+    output: std::fs::File,
+    mut body: Payload,
+    format: PayloadType,
+) -> Result<std::fs::File, MeilisearchHttpError> {
+    let async_file = File::from_std(output);
+    let mut buffer = BufWriter::new(async_file);
+    let mut buffer_write_size: usize = 0;
+    while let Some(result) = body.next().await {
+        let byte = result?;
+
+        if byte.is_empty() && buffer_write_size == 0 {
+            return Err(MeilisearchHttpError::MissingPayload(format));
+        }
+
+        match buffer.write_all(&byte).await {
+            Ok(()) => buffer_write_size += 1,
+            Err(e) => return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e)))),
+        }
+    }
+    if let Err(e) = buffer.flush().await {
+        return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e))));
+    }
+    if buffer_write_size == 0 {
+        return Err(MeilisearchHttpError::MissingPayload(format));
+    }
+    if let Err(e) = buffer.seek(std::io::SeekFrom::Start(0)).await {
+        return Err(MeilisearchHttpError::Payload(ReceivePayload(Box::new(e))));
+    }
+    let read_file = buffer.into_inner().into_std().await;
+    Ok(read_file)
+}
+
 pub async fn delete_documents_batch(
     index_scheduler: GuardedData<ActionPolicy<{ actions::DOCUMENTS_DELETE }>, Data<IndexScheduler>>,
     index_uid: web::Path<String>,

crates/meilisearch/src/routes/indexes/facet_search.rs

@@ -185,7 +185,8 @@ pub async fn search(
 
     let index = index_scheduler.index(&index_uid)?;
     let features = index_scheduler.features();
-    let search_kind = search_kind(&search_query, &index_scheduler, &index, features)?;
+    let search_kind =
+        search_kind(&search_query, &index_scheduler, index_uid.to_string(), &index, features)?;
     let permit = search_queue.try_get_search_permit().await?;
     let search_result = tokio::task::spawn_blocking(move || {
         perform_facet_search(

crates/meilisearch/src/routes/indexes/mod.rs

@@ -5,7 +5,7 @@ use actix_web::web::Data;
 use actix_web::{web, HttpRequest, HttpResponse};
 use deserr::actix_web::{AwebJson, AwebQueryParameter};
 use deserr::{DeserializeError, Deserr, ValuePointerRef};
-use index_scheduler::IndexScheduler;
+use index_scheduler::{Error, IndexScheduler};
 use meilisearch_types::deserr::query_params::Param;
 use meilisearch_types::deserr::{immutable_field_error, DeserrJsonError, DeserrQueryParamError};
 use meilisearch_types::error::deserr_codes::*;
@@ -107,7 +107,10 @@ pub async fn list_indexes(
             if !filters.is_index_authorized(uid) {
                 return Ok(None);
             }
-            Ok(Some(IndexView::new(uid.to_string(), index)?))
+            Ok(Some(
+                IndexView::new(uid.to_string(), index)
+                    .map_err(|e| Error::from_milli(e, Some(uid.to_string())))?,
+            ))
         })?;
     // Won't cause to open all indexes because IndexView doesn't keep the `Index` opened.
     let indexes: Vec<IndexView> = indexes.into_iter().flatten().collect();

crates/meilisearch/src/routes/indexes/search.rs

@@ -243,11 +243,19 @@ pub async fn search_with_url_query(
     let index = index_scheduler.index(&index_uid)?;
     let features = index_scheduler.features();
 
-    let search_kind = search_kind(&query, index_scheduler.get_ref(), &index, features)?;
+    let search_kind =
+        search_kind(&query, index_scheduler.get_ref(), index_uid.to_string(), &index, features)?;
     let retrieve_vector = RetrieveVectors::new(query.retrieve_vectors, features)?;
     let permit = search_queue.try_get_search_permit().await?;
     let search_result = tokio::task::spawn_blocking(move || {
-        perform_search(&index, query, search_kind, retrieve_vector, index_scheduler.features())
+        perform_search(
+            index_uid.to_string(),
+            &index,
+            query,
+            search_kind,
+            retrieve_vector,
+            index_scheduler.features(),
+        )
     })
     .await;
     permit.drop().await;
@@ -287,12 +295,20 @@ pub async fn search_with_post(
 
     let features = index_scheduler.features();
 
-    let search_kind = search_kind(&query, index_scheduler.get_ref(), &index, features)?;
+    let search_kind =
+        search_kind(&query, index_scheduler.get_ref(), index_uid.to_string(), &index, features)?;
     let retrieve_vectors = RetrieveVectors::new(query.retrieve_vectors, features)?;
 
     let permit = search_queue.try_get_search_permit().await?;
     let search_result = tokio::task::spawn_blocking(move || {
-        perform_search(&index, query, search_kind, retrieve_vectors, index_scheduler.features())
+        perform_search(
+            index_uid.to_string(),
+            &index,
+            query,
+            search_kind,
+            retrieve_vectors,
+            index_scheduler.features(),
+        )
     })
     .await;
     permit.drop().await;
@@ -314,6 +330,7 @@ pub async fn search_with_post(
 pub fn search_kind(
     query: &SearchQuery,
     index_scheduler: &IndexScheduler,
+    index_uid: String,
     index: &milli::Index,
     features: RoFeatures,
 ) -> Result<SearchKind, ResponseError> {
@@ -332,7 +349,7 @@ pub fn search_kind(
         (None, _, None) => Ok(SearchKind::KeywordOnly),
         // hybrid.semantic_ratio == 1.0 => vector
         (_, Some(HybridQuery { semantic_ratio, embedder }), v) if **semantic_ratio == 1.0 => {
-            SearchKind::semantic(index_scheduler, index, embedder, v.map(|v| v.len()))
+            SearchKind::semantic(index_scheduler, index_uid, index, embedder, v.map(|v| v.len()))
         }
         // hybrid.semantic_ratio == 0.0 => keyword
         (_, Some(HybridQuery { semantic_ratio, embedder: _ }), _) if **semantic_ratio == 0.0 => {
@@ -340,13 +357,14 @@ pub fn search_kind(
         }
         // no query, hybrid, vector => semantic
         (None, Some(HybridQuery { semantic_ratio: _, embedder }), Some(v)) => {
-            SearchKind::semantic(index_scheduler, index, embedder, Some(v.len()))
+            SearchKind::semantic(index_scheduler, index_uid, index, embedder, Some(v.len()))
         }
         // query, no hybrid, no vector => keyword
         (Some(_), None, None) => Ok(SearchKind::KeywordOnly),
         // query, hybrid, maybe vector => hybrid
         (Some(_), Some(HybridQuery { semantic_ratio, embedder }), v) => SearchKind::hybrid(
             index_scheduler,
+            index_uid,
             index,
             embedder,
             **semantic_ratio,

crates/meilisearch/src/routes/indexes/similar.rs

@@ -103,8 +103,13 @@ async fn similar(
 
     let index = index_scheduler.index(&index_uid)?;
 
-    let (embedder_name, embedder, quantized) =
+    let (embedder_name, embedder, quantized) = SearchKind::embedder(
-        SearchKind::embedder(&index_scheduler, &index, &query.embedder, None)?;
+        &index_scheduler,
+        index_uid.to_string(),
+        &index,
+        &query.embedder,
+        None,
+    )?;
 
     tokio::task::spawn_blocking(move || {
         perform_similar(

crates/meilisearch/src/routes/multi_search.rs

@@ -125,14 +125,28 @@ pub async fn multi_search_with_post(
                         })
                         .with_index(query_index)?;
 
-                    let search_kind =
+                    let index_uid_str = index_uid.to_string();
-                        search_kind(&query, index_scheduler.get_ref(), &index, features)
+
-                            .with_index(query_index)?;
+                    let search_kind = search_kind(
+                        &query,
+                        index_scheduler.get_ref(),
+                        index_uid_str.clone(),
+                        &index,
+                        features,
+                    )
+                    .with_index(query_index)?;
                     let retrieve_vector = RetrieveVectors::new(query.retrieve_vectors, features)
                         .with_index(query_index)?;
 
                     let search_result = tokio::task::spawn_blocking(move || {
-                        perform_search(&index, query, search_kind, retrieve_vector, features)
+                        perform_search(
+                            index_uid_str.clone(),
+                            &index,
+                            query,
+                            search_kind,
+                            retrieve_vector,
+                            features,
+                        )
                     })
                     .await
                     .with_index(query_index)?;

crates/meilisearch/src/search/federated.rs

@@ -560,7 +560,8 @@ pub fn perform_federated_search(
             // use an immediately invoked lambda to capture the result without returning from the function
 
             let res: Result<(), ResponseError> = (|| {
-                let search_kind = search_kind(&query, index_scheduler, &index, features)?;
+                let search_kind =
+                    search_kind(&query, index_scheduler, index_uid.to_string(), &index, features)?;
 
                 let canonicalization_kind = match (&search_kind, &query.q) {
                     (SearchKind::SemanticOnly { .. }, _) => {
@@ -636,7 +637,8 @@ pub fn perform_federated_search(
                 search.offset(0);
                 search.limit(required_hit_count);
 
-                let (result, _semantic_hit_count) = super::search_from_kind(search_kind, search)?;
+                let (result, _semantic_hit_count) =
+                    super::search_from_kind(index_uid.to_string(), search_kind, search)?;
                 let format = AttributesFormat {
                     attributes_to_retrieve: query.attributes_to_retrieve,
                     retrieve_vectors,
@@ -670,7 +672,10 @@ pub fn perform_federated_search(
 
                 let formatter_builder = HitMaker::formatter_builder(matching_words, tokenizer);
 
-                let hit_maker = HitMaker::new(&index, &rtxn, format, formatter_builder)?;
+                let hit_maker =
+                    HitMaker::new(&index, &rtxn, format, formatter_builder).map_err(|e| {
+                        MeilisearchHttpError::from_milli(e, Some(index_uid.to_string()))
+                    })?;
 
                 results_by_query.push(SearchResultByQuery {
                     federation_options,

crates/meilisearch/src/search/mod.rs

@@ -19,7 +19,9 @@ use meilisearch_types::locales::Locale;
 use meilisearch_types::milli::score_details::{ScoreDetails, ScoringStrategy};
 use meilisearch_types::milli::vector::parsed_vectors::ExplicitVectors;
 use meilisearch_types::milli::vector::Embedder;
-use meilisearch_types::milli::{FacetValueHit, OrderBy, SearchForFacetValues, TimeBudget};
+use meilisearch_types::milli::{
+    FacetValueHit, InternalError, OrderBy, SearchForFacetValues, TimeBudget,
+};
 use meilisearch_types::settings::DEFAULT_PAGINATION_MAX_TOTAL_HITS;
 use meilisearch_types::{milli, Document};
 use milli::tokenizer::{Language, TokenizerBuilder};
@@ -281,35 +283,38 @@ pub enum SearchKind {
 impl SearchKind {
     pub(crate) fn semantic(
         index_scheduler: &index_scheduler::IndexScheduler,
+        index_uid: String,
         index: &Index,
         embedder_name: &str,
         vector_len: Option<usize>,
     ) -> Result<Self, ResponseError> {
         let (embedder_name, embedder, quantized) =
-            Self::embedder(index_scheduler, index, embedder_name, vector_len)?;
+            Self::embedder(index_scheduler, index_uid, index, embedder_name, vector_len)?;
         Ok(Self::SemanticOnly { embedder_name, embedder, quantized })
     }
 
     pub(crate) fn hybrid(
         index_scheduler: &index_scheduler::IndexScheduler,
+        index_uid: String,
         index: &Index,
         embedder_name: &str,
         semantic_ratio: f32,
         vector_len: Option<usize>,
     ) -> Result<Self, ResponseError> {
         let (embedder_name, embedder, quantized) =
-            Self::embedder(index_scheduler, index, embedder_name, vector_len)?;
+            Self::embedder(index_scheduler, index_uid, index, embedder_name, vector_len)?;
         Ok(Self::Hybrid { embedder_name, embedder, quantized, semantic_ratio })
     }
 
     pub(crate) fn embedder(
         index_scheduler: &index_scheduler::IndexScheduler,
+        index_uid: String,
         index: &Index,
         embedder_name: &str,
         vector_len: Option<usize>,
     ) -> Result<(String, Arc<Embedder>, bool), ResponseError> {
         let embedder_configs = index.embedding_configs(&index.read_txn()?)?;
-        let embedders = index_scheduler.embedders(embedder_configs)?;
+        let embedders = index_scheduler.embedders(index_uid, embedder_configs)?;
 
         let (embedder, _, quantized) = embedders
             .get(embedder_name)
@@ -890,6 +895,7 @@ fn prepare_search<'t>(
 }
 
 pub fn perform_search(
+    index_uid: String,
     index: &Index,
     query: SearchQuery,
     search_kind: SearchKind,
@@ -916,7 +922,7 @@ pub fn perform_search(
             used_negative_operator,
         },
         semantic_hit_count,
-    ) = search_from_kind(search_kind, search)?;
+    ) = search_from_kind(index_uid, search_kind, search)?;
 
     let SearchQuery {
         q,
@@ -1069,17 +1075,27 @@ fn compute_facet_distribution_stats<S: AsRef<str>>(
 }
 
 pub fn search_from_kind(
+    index_uid: String,
     search_kind: SearchKind,
     search: milli::Search<'_>,
 ) -> Result<(milli::SearchResult, Option<u32>), MeilisearchHttpError> {
     let (milli_result, semantic_hit_count) = match &search_kind {
-        SearchKind::KeywordOnly => (search.execute()?, None),
+        SearchKind::KeywordOnly => {
+            let results = search
+                .execute()
+                .map_err(|e| MeilisearchHttpError::from_milli(e, Some(index_uid.to_string())))?;
+            (results, None)
+        }
         SearchKind::SemanticOnly { .. } => {
-            let results = search.execute()?;
+            let results = search
+                .execute()
+                .map_err(|e| MeilisearchHttpError::from_milli(e, Some(index_uid.to_string())))?;
             let semantic_hit_count = results.document_scores.len() as u32;
             (results, Some(semantic_hit_count))
         }
-        SearchKind::Hybrid { semantic_ratio, .. } => search.execute_hybrid(*semantic_ratio)?,
+        SearchKind::Hybrid { semantic_ratio, .. } => search
+            .execute_hybrid(*semantic_ratio)
+            .map_err(|e| MeilisearchHttpError::from_milli(e, Some(index_uid)))?,
     };
     Ok((milli_result, semantic_hit_count))
 }
@@ -1181,7 +1197,7 @@ impl<'a> HitMaker<'a> {
         rtxn: &'a RoTxn<'a>,
         format: AttributesFormat,
         mut formatter_builder: MatcherBuilder<'a>,
-    ) -> Result<Self, MeilisearchHttpError> {
+    ) -> milli::Result<Self> {
         formatter_builder.crop_marker(format.crop_marker);
         formatter_builder.highlight_prefix(format.highlight_pre_tag);
         formatter_builder.highlight_suffix(format.highlight_post_tag);
@@ -1276,11 +1292,7 @@ impl<'a> HitMaker<'a> {
         })
     }
 
-    pub fn make_hit(
+    pub fn make_hit(&self, id: u32, score: &[ScoreDetails]) -> milli::Result<SearchHit> {
-        &self,
-        id: u32,
-        score: &[ScoreDetails],
-    ) -> Result<SearchHit, MeilisearchHttpError> {
         let (_, obkv) =
             self.index.iter_documents(self.rtxn, std::iter::once(id))?.next().unwrap()?;
 
@@ -1323,7 +1335,10 @@ impl<'a> HitMaker<'a> {
                     .is_some_and(|conf| conf.user_provided.contains(id));
                 let embeddings =
                     ExplicitVectors { embeddings: Some(vector.into()), regenerate: !user_provided };
-                vectors.insert(name, serde_json::to_value(embeddings)?);
+                vectors.insert(
+                    name,
+                    serde_json::to_value(embeddings).map_err(InternalError::SerdeJson)?,
+                );
             }
             document.insert("_vectors".into(), vectors.into());
         }
@@ -1369,7 +1384,7 @@ fn make_hits<'a>(
     format: AttributesFormat,
     matching_words: milli::MatchingWords,
     documents_ids_scores: impl Iterator<Item = (u32, &'a Vec<ScoreDetails>)> + 'a,
-) -> Result<Vec<SearchHit>, MeilisearchHttpError> {
+) -> milli::Result<Vec<SearchHit>> {
     let mut documents = Vec::new();
 
     let dictionary = index.dictionary(rtxn)?;
@@ -1407,6 +1422,13 @@ pub fn perform_facet_search(
         None => TimeBudget::default(),
     };
 
+    if !index.facet_search(&rtxn)? {
+        return Err(ResponseError::from_msg(
+            "The facet search is disabled for this index".to_string(),
+            Code::FacetSearchDisabled,
+        ));
+    }
+
     // In the faceted search context, we want to use the intersection between the locales provided by the user
     // and the locales of the facet string.
     // If the facet string is not localized, we **ignore** the locales provided by the user because the facet data has no locale.
@@ -1690,12 +1712,12 @@ fn make_document(
     displayed_attributes: &BTreeSet<FieldId>,
     field_ids_map: &FieldsIdsMap,
     obkv: &obkv::KvReaderU16,
-) -> Result<Document, MeilisearchHttpError> {
+) -> milli::Result<Document> {
     let mut document = serde_json::Map::new();
 
     // recreate the original json
     for (key, value) in obkv.iter() {
-        let value = serde_json::from_slice(value)?;
+        let value = serde_json::from_slice(value).map_err(InternalError::SerdeJson)?;
         let key = field_ids_map.name(key).expect("Missing field name").to_string();
 
         document.insert(key, value);
@@ -1720,7 +1742,7 @@ fn format_fields(
     displayable_ids: &BTreeSet<FieldId>,
     locales: Option<&[Language]>,
     localized_attributes: &[LocalizedAttributesRule],
-) -> Result<(Option<MatchesPosition>, Document), MeilisearchHttpError> {
+) -> milli::Result<(Option<MatchesPosition>, Document)> {
     let mut matches_position = compute_matches.then(BTreeMap::new);
     let mut document = document.clone();
 
@@ -1898,7 +1920,7 @@ fn parse_filter_array(arr: &[Value]) -> Result<Option<Filter>, MeilisearchHttpEr
         }
     }
 
-    Ok(Filter::from_array(ands)?)
+    Filter::from_array(ands).map_err(|e| MeilisearchHttpError::from_milli(e, None))
 }
 
 #[cfg(test)]

crates/meilisearch/tests/batches/mod.rs

@@ -284,6 +284,7 @@ async fn test_summarized_document_addition_or_update() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "receivedDocuments": 1,
         "indexedDocuments": 1
@@ -314,6 +315,7 @@ async fn test_summarized_document_addition_or_update() {
         @r#"
     {
       "uid": 1,
+      "progress": null,
       "details": {
         "receivedDocuments": 1,
         "indexedDocuments": 1
@@ -349,6 +351,7 @@ async fn test_summarized_delete_documents_by_batch() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "providedIds": 3,
         "deletedDocuments": 0
@@ -380,6 +383,7 @@ async fn test_summarized_delete_documents_by_batch() {
         @r#"
     {
       "uid": 2,
+      "progress": null,
       "details": {
         "providedIds": 1,
         "deletedDocuments": 0
@@ -416,6 +420,7 @@ async fn test_summarized_delete_documents_by_filter() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "providedIds": 0,
         "deletedDocuments": 0,
@@ -448,6 +453,7 @@ async fn test_summarized_delete_documents_by_filter() {
         @r#"
     {
       "uid": 2,
+      "progress": null,
       "details": {
         "providedIds": 0,
         "deletedDocuments": 0,
@@ -480,6 +486,7 @@ async fn test_summarized_delete_documents_by_filter() {
         @r#"
     {
       "uid": 4,
+      "progress": null,
       "details": {
         "providedIds": 0,
         "deletedDocuments": 0,
@@ -516,6 +523,7 @@ async fn test_summarized_delete_document_by_id() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "providedIds": 1,
         "deletedDocuments": 0
@@ -547,6 +555,7 @@ async fn test_summarized_delete_document_by_id() {
         @r#"
     {
       "uid": 2,
+      "progress": null,
       "details": {
         "providedIds": 1,
         "deletedDocuments": 0
@@ -594,6 +603,7 @@ async fn test_summarized_settings_update() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "displayedAttributes": [
           "doggos",
@@ -638,6 +648,7 @@ async fn test_summarized_index_creation() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {},
       "stats": {
         "totalNbTasks": 1,
@@ -665,6 +676,7 @@ async fn test_summarized_index_creation() {
         @r#"
     {
       "uid": 1,
+      "progress": null,
       "details": {
         "primaryKey": "doggos"
       },
@@ -809,6 +821,7 @@ async fn test_summarized_index_update() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {},
       "stats": {
         "totalNbTasks": 1,
@@ -836,6 +849,7 @@ async fn test_summarized_index_update() {
         @r#"
     {
       "uid": 1,
+      "progress": null,
       "details": {
         "primaryKey": "bones"
       },
@@ -868,6 +882,7 @@ async fn test_summarized_index_update() {
         @r#"
     {
       "uid": 3,
+      "progress": null,
       "details": {},
       "stats": {
         "totalNbTasks": 1,
@@ -895,6 +910,7 @@ async fn test_summarized_index_update() {
         @r#"
     {
       "uid": 4,
+      "progress": null,
       "details": {
         "primaryKey": "bones"
       },
@@ -932,6 +948,7 @@ async fn test_summarized_index_swap() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "swaps": [
           {
@@ -972,6 +989,7 @@ async fn test_summarized_index_swap() {
         @r#"
     {
       "uid": 3,
+      "progress": null,
       "details": {
         "swaps": [
           {
@@ -1014,6 +1032,7 @@ async fn test_summarized_batch_cancelation() {
         @r#"
     {
       "uid": 1,
+      "progress": null,
       "details": {
         "matchedTasks": 1,
         "canceledTasks": 0,
@@ -1051,6 +1070,7 @@ async fn test_summarized_batch_deletion() {
         @r#"
     {
       "uid": 1,
+      "progress": null,
       "details": {
         "matchedTasks": 1,
         "deletedTasks": 1,
@@ -1084,6 +1104,7 @@ async fn test_summarized_dump_creation() {
         @r#"
     {
       "uid": 0,
+      "progress": null,
       "details": {
         "dumpUid": "[dumpUid]"
       },

crates/meilisearch/tests/common/mod.rs

@@ -52,6 +52,25 @@ impl Value {
         }
         self
     }
+
+    /// Return `true` if the `status` field is set to `failed`.
+    /// Panic if the `status` field doesn't exists.
+    #[track_caller]
+    pub fn is_fail(&self) -> bool {
+        if !self["status"].is_string() {
+            panic!("Called `is_fail` on {}", serde_json::to_string_pretty(&self.0).unwrap());
+        }
+        self["status"] == serde_json::Value::String(String::from("failed"))
+    }
+
+    // Panic if the json doesn't contain the `status` field set to "succeeded"
+    #[track_caller]
+    pub fn failed(&self) -> &Self {
+        if !self.is_fail() {
+            panic!("Called failed on {}", serde_json::to_string_pretty(&self.0).unwrap());
+        }
+        self
+    }
 }
 
 impl From<serde_json::Value> for Value {

crates/meilisearch/tests/documents/add_documents.rs

@@ -1220,9 +1220,89 @@ async fn replace_document() {
 #[actix_rt::test]
 async fn add_no_documents() {
     let server = Server::new().await;
-    let index = server.index("test");
+    let index = server.index("kefir");
-    let (_response, code) = index.add_documents(json!([]), None).await;
+    let (task, code) = index.add_documents(json!([]), None).await;
     snapshot!(code, @"202 Accepted");
+    let task = server.wait_task(task.uid()).await;
+    let task = task.succeeded();
+    snapshot!(task, @r#"
+    {
+      "uid": "[uid]",
+      "batchUid": "[batch_uid]",
+      "indexUid": "kefir",
+      "status": "succeeded",
+      "type": "documentAdditionOrUpdate",
+      "canceledBy": null,
+      "details": {
+        "receivedDocuments": 0,
+        "indexedDocuments": 0
+      },
+      "error": null,
+      "duration": "[duration]",
+      "enqueuedAt": "[date]",
+      "startedAt": "[date]",
+      "finishedAt": "[date]"
+    }
+    "#);
+
+    let (task, _code) = index.add_documents(json!([]), Some("kefkef")).await;
+    let task = server.wait_task(task.uid()).await;
+    let task = task.succeeded();
+    snapshot!(task, @r#"
+    {
+      "uid": "[uid]",
+      "batchUid": "[batch_uid]",
+      "indexUid": "kefir",
+      "status": "succeeded",
+      "type": "documentAdditionOrUpdate",
+      "canceledBy": null,
+      "details": {
+        "receivedDocuments": 0,
+        "indexedDocuments": 0
+      },
+      "error": null,
+      "duration": "[duration]",
+      "enqueuedAt": "[date]",
+      "startedAt": "[date]",
+      "finishedAt": "[date]"
+    }
+    "#);
+
+    let (task, _code) = index.add_documents(json!([{ "kefkef": 1 }]), None).await;
+    let task = server.wait_task(task.uid()).await;
+    let task = task.succeeded();
+    snapshot!(task, @r#"
+    {
+      "uid": "[uid]",
+      "batchUid": "[batch_uid]",
+      "indexUid": "kefir",
+      "status": "succeeded",
+      "type": "documentAdditionOrUpdate",
+      "canceledBy": null,
+      "details": {
+        "receivedDocuments": 1,
+        "indexedDocuments": 1
+      },
+      "error": null,
+      "duration": "[duration]",
+      "enqueuedAt": "[date]",
+      "startedAt": "[date]",
+      "finishedAt": "[date]"
+    }
+    "#);
+    let (documents, _status) = index.get_all_documents(GetAllDocumentsOptions::default()).await;
+    snapshot!(documents, @r#"
+    {
+      "results": [
+        {
+          "kefkef": 1
+        }
+      ],
+      "offset": 0,
+      "limit": 20,
+      "total": 1
+    }
+    "#);
 }
 
 #[actix_rt::test]
@@ -1264,15 +1344,18 @@ async fn error_add_documents_bad_document_id() {
     let server = Server::new().await;
     let index = server.index("test");
     index.create(Some("docid")).await;
+
+    // unsupported characters
+
     let documents = json!([
         {
             "docid": "foo & bar",
             "content": "foobar"
         }
     ]);
-    index.add_documents(documents, None).await;
+    let (value, _code) = index.add_documents(documents, None).await;
-    index.wait_task(1).await;
+    index.wait_task(value.uid()).await;
-    let (response, code) = index.get_task(1).await;
+    let (response, code) = index.get_task(value.uid()).await;
     snapshot!(code, @"200 OK");
     snapshot!(json_string!(response, { ".duration" => "[duration]", ".enqueuedAt" => "[date]", ".startedAt" => "[date]", ".finishedAt" => "[date]" }),
         @r###"
@@ -1288,7 +1371,81 @@ async fn error_add_documents_bad_document_id() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Document identifier `\"foo & bar\"` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 512 bytes.",
+        "message": "Document identifier `\"foo & bar\"` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 511 bytes.",
+        "code": "invalid_document_id",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_document_id"
+      },
+      "duration": "[duration]",
+      "enqueuedAt": "[date]",
+      "startedAt": "[date]",
+      "finishedAt": "[date]"
+    }
+    "###);
+
+    // More than 512 bytes
+    let documents = json!([
+        {
+            "docid": "a".repeat(600),
+            "content": "foobar"
+        }
+    ]);
+    let (value, _code) = index.add_documents(documents, None).await;
+    index.wait_task(value.uid()).await;
+    let (response, code) = index.get_task(value.uid()).await;
+    snapshot!(code, @"200 OK");
+    snapshot!(json_string!(response, { ".duration" => "[duration]", ".enqueuedAt" => "[date]", ".startedAt" => "[date]", ".finishedAt" => "[date]" }),
+      @r###"
+    {
+      "uid": 2,
+      "batchUid": 2,
+      "indexUid": "test",
+      "status": "failed",
+      "type": "documentAdditionOrUpdate",
+      "canceledBy": null,
+      "details": {
+        "receivedDocuments": 1,
+        "indexedDocuments": 0
+      },
+      "error": {
+        "message": "Document identifier `\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 511 bytes.",
+        "code": "invalid_document_id",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_document_id"
+      },
+      "duration": "[duration]",
+      "enqueuedAt": "[date]",
+      "startedAt": "[date]",
+      "finishedAt": "[date]"
+    }
+    "###);
+
+    // Exactly 512 bytes
+    let documents = json!([
+        {
+            "docid": "a".repeat(512),
+            "content": "foobar"
+        }
+    ]);
+    let (value, _code) = index.add_documents(documents, None).await;
+    index.wait_task(value.uid()).await;
+    let (response, code) = index.get_task(value.uid()).await;
+    snapshot!(code, @"200 OK");
+    snapshot!(json_string!(response, { ".duration" => "[duration]", ".enqueuedAt" => "[date]", ".startedAt" => "[date]", ".finishedAt" => "[date]" }),
+    @r###"
+    {
+      "uid": 3,
+      "batchUid": 3,
+      "indexUid": "test",
+      "status": "failed",
+      "type": "documentAdditionOrUpdate",
+      "canceledBy": null,
+      "details": {
+        "receivedDocuments": 1,
+        "indexedDocuments": 0
+      },
+      "error": {
+        "message": "Document identifier `\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 511 bytes.",
         "code": "invalid_document_id",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_id"
@@ -1681,7 +1838,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "The `_geo` field in the document with the id: `\"11\"` is not an object. Was expecting an object with the `_geo.lat` and `_geo.lng` fields but instead got `\"foobar\"`.",
+        "message": "Index `test`: The `_geo` field in the document with the id: `\"11\"` is not an object. Was expecting an object with the `_geo.lat` and `_geo.lng` fields but instead got `\"foobar\"`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1719,7 +1876,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find latitude nor longitude in the document with the id: `\"11\"`. Was expecting `_geo.lat` and `_geo.lng` fields.",
+        "message": "Index `test`: Could not find latitude nor longitude in the document with the id: `\"11\"`. Was expecting `_geo.lat` and `_geo.lng` fields.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1757,7 +1914,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find latitude nor longitude in the document with the id: `\"11\"`. Was expecting `_geo.lat` and `_geo.lng` fields.",
+        "message": "Index `test`: Could not find latitude nor longitude in the document with the id: `\"11\"`. Was expecting `_geo.lat` and `_geo.lng` fields.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1795,7 +1952,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find longitude in the document with the id: `\"11\"`. Was expecting a `_geo.lng` field.",
+        "message": "Index `test`: Could not find longitude in the document with the id: `\"11\"`. Was expecting a `_geo.lng` field.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1833,7 +1990,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find latitude in the document with the id: `\"11\"`. Was expecting a `_geo.lat` field.",
+        "message": "Index `test`: Could not find latitude in the document with the id: `\"11\"`. Was expecting a `_geo.lat` field.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1871,7 +2028,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find longitude in the document with the id: `\"11\"`. Was expecting a `_geo.lng` field.",
+        "message": "Index `test`: Could not find longitude in the document with the id: `\"11\"`. Was expecting a `_geo.lng` field.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1909,7 +2066,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find latitude in the document with the id: `\"11\"`. Was expecting a `_geo.lat` field.",
+        "message": "Index `test`: Could not find latitude in the document with the id: `\"11\"`. Was expecting a `_geo.lat` field.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1947,7 +2104,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not parse latitude nor longitude in the document with the id: `\"11\"`. Was expecting finite numbers but instead got `false` and `true`.",
+        "message": "Index `test`: Could not parse latitude nor longitude in the document with the id: `\"11\"`. Was expecting finite numbers but instead got `false` and `true`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -1985,7 +2142,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find longitude in the document with the id: `\"11\"`. Was expecting a `_geo.lng` field.",
+        "message": "Index `test`: Could not find longitude in the document with the id: `\"11\"`. Was expecting a `_geo.lng` field.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2023,7 +2180,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not find latitude in the document with the id: `\"11\"`. Was expecting a `_geo.lat` field.",
+        "message": "Index `test`: Could not find latitude in the document with the id: `\"11\"`. Was expecting a `_geo.lat` field.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2061,7 +2218,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not parse latitude nor longitude in the document with the id: `\"11\"`. Was expecting finite numbers but instead got `\"doggo\"` and `\"doggo\"`.",
+        "message": "Index `test`: Could not parse latitude nor longitude in the document with the id: `\"11\"`. Was expecting finite numbers but instead got `\"doggo\"` and `\"doggo\"`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2099,7 +2256,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "The `_geo` field in the document with the id: `\"11\"` contains the following unexpected fields: `{\"doggo\":\"are the best\"}`.",
+        "message": "Index `test`: The `_geo` field in the document with the id: `\"11\"` contains the following unexpected fields: `{\"doggo\":\"are the best\"}`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2138,7 +2295,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not parse longitude in the document with the id: `\"12\"`. Was expecting a finite number but instead got `null`.",
+        "message": "Index `test`: Could not parse longitude in the document with the id: `\"12\"`. Was expecting a finite number but instead got `null`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2175,7 +2332,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not parse latitude in the document with the id: `\"12\"`. Was expecting a finite number but instead got `null`.",
+        "message": "Index `test`: Could not parse latitude in the document with the id: `\"12\"`. Was expecting a finite number but instead got `null`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2212,7 +2369,7 @@ async fn add_documents_invalid_geo_field() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Could not parse latitude nor longitude in the document with the id: `\"13\"`. Was expecting finite numbers but instead got `null` and `null`.",
+        "message": "Index `test`: Could not parse latitude nor longitude in the document with the id: `\"13\"`. Was expecting finite numbers but instead got `null` and `null`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"
@@ -2279,7 +2436,7 @@ async fn add_invalid_geo_and_then_settings() {
         ]
       },
       "error": {
-        "message": "Could not parse latitude in the document with the id: `\"11\"`. Was expecting a finite number but instead got `null`.",
+        "message": "Index `test`: Could not parse latitude in the document with the id: `\"11\"`. Was expecting a finite number but instead got `null`.",
         "code": "invalid_document_geo_field",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_geo_field"

crates/meilisearch/tests/documents/errors.rs

@@ -604,7 +604,7 @@ async fn delete_document_by_filter() {
         "originalFilter": "\"doggo = bernese\""
       },
       "error": {
-        "message": "Attribute `doggo` is not filterable. This index does not have configured filterable attributes.\n1:6 doggo = bernese",
+        "message": "Index `EMPTY_INDEX`: Attribute `doggo` is not filterable. This index does not have configured filterable attributes.\n1:6 doggo = bernese",
         "code": "invalid_document_filter",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_filter"
@@ -636,7 +636,7 @@ async fn delete_document_by_filter() {
         "originalFilter": "\"catto = jorts\""
       },
       "error": {
-        "message": "Attribute `catto` is not filterable. Available filterable attributes are: `id`, `title`.\n1:6 catto = jorts",
+        "message": "Index `SHARED_DOCUMENTS`: Attribute `catto` is not filterable. Available filterable attributes are: `id`, `title`.\n1:6 catto = jorts",
         "code": "invalid_document_filter",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_filter"

crates/meilisearch/tests/documents/update_documents.rs

@@ -172,7 +172,7 @@ async fn error_update_documents_bad_document_id() {
     assert_eq!(
         response["error"]["message"],
         json!(
-            r#"Document identifier `"foo & bar"` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 512 bytes."#
+            r#"Document identifier `"foo & bar"` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 511 bytes."#
         )
     );
     assert_eq!(response["error"]["code"], json!("invalid_document_id"));

crates/meilisearch/tests/index/update_index.rs

@@ -95,7 +95,7 @@ async fn error_update_existing_primary_key() {
     let response = index.wait_task(2).await;
 
     let expected_response = json!({
-        "message": "Index already has a primary key: `id`.",
+        "message": "Index `test`: Index already has a primary key: `id`.",
         "code": "index_primary_key_already_exists",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#index_primary_key_already_exists"

crates/meilisearch/tests/search/errors.rs

@@ -711,7 +711,7 @@ async fn filter_invalid_attribute_array() {
     index.wait_task(task.uid()).await;
 
     let expected_response = json!({
-        "message": "Attribute `many` is not filterable. Available filterable attributes are: `title`.\n1:5 many = Glass",
+        "message": format!("Index `{}`: Attribute `many` is not filterable. Available filterable attributes are: `title`.\n1:5 many = Glass", index.uid),
         "code": "invalid_search_filter",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_search_filter"
@@ -733,7 +733,7 @@ async fn filter_invalid_attribute_string() {
     index.wait_task(task.uid()).await;
 
     let expected_response = json!({
-        "message": "Attribute `many` is not filterable. Available filterable attributes are: `title`.\n1:5 many = Glass",
+        "message": format!("Index `{}`: Attribute `many` is not filterable. Available filterable attributes are: `title`.\n1:5 many = Glass", index.uid),
         "code": "invalid_search_filter",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_search_filter"
@@ -940,7 +940,7 @@ async fn sort_unsortable_attribute() {
     index.wait_task(response.uid()).await.succeeded();
 
     let expected_response = json!({
-        "message": "Attribute `title` is not sortable. Available sortable attributes are: `id`.",
+        "message": format!("Index `{}`: Attribute `title` is not sortable. Available sortable attributes are: `id`.", index.uid),
         "code": "invalid_search_sort",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_search_sort"
@@ -998,7 +998,7 @@ async fn sort_unset_ranking_rule() {
     index.wait_task(response.uid()).await.succeeded();
 
     let expected_response = json!({
-        "message": "You must specify where `sort` is listed in the rankingRules setting to use the sort parameter at search time.",
+        "message": format!("Index `{}`: You must specify where `sort` is listed in the rankingRules setting to use the sort parameter at search time.", index.uid),
         "code": "invalid_search_sort",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_search_sort"
@@ -1024,19 +1024,18 @@ async fn search_on_unknown_field() {
         index.update_settings_searchable_attributes(json!(["id", "title"])).await;
     index.wait_task(response.uid()).await.succeeded();
 
+    let expected_response = json!({
+        "message": format!("Index `{}`: Attribute `unknown` is not searchable. Available searchable attributes are: `id, title`.", index.uid),
+        "code": "invalid_search_attributes_to_search_on",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_search_attributes_to_search_on"
+    });
     index
         .search(
             json!({"q": "Captain Marvel", "attributesToSearchOn": ["unknown"]}),
             |response, code| {
-                snapshot!(code, @"400 Bad Request");
+                assert_eq!(response, expected_response);
-                snapshot!(json_string!(response), @r###"
+                assert_eq!(code, 400);
-                {
-                  "message": "Attribute `unknown` is not searchable. Available searchable attributes are: `id, title`.",
-                  "code": "invalid_search_attributes_to_search_on",
-                  "type": "invalid_request",
-                  "link": "https://docs.meilisearch.com/errors#invalid_search_attributes_to_search_on"
-                }
-                "###);
             },
         )
         .await;
@@ -1050,19 +1049,18 @@ async fn search_on_unknown_field_plus_joker() {
         index.update_settings_searchable_attributes(json!(["id", "title"])).await;
     index.wait_task(response.uid()).await.succeeded();
 
+    let expected_response = json!({
+        "message": format!("Index `{}`: Attribute `unknown` is not searchable. Available searchable attributes are: `id, title`.", index.uid),
+        "code": "invalid_search_attributes_to_search_on",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_search_attributes_to_search_on"
+    });
     index
         .search(
             json!({"q": "Captain Marvel", "attributesToSearchOn": ["*", "unknown"]}),
             |response, code| {
-                snapshot!(code, @"400 Bad Request");
+                assert_eq!(response, expected_response);
-                snapshot!(json_string!(response), @r###"
+                assert_eq!(code, 400);
-                {
-                  "message": "Attribute `unknown` is not searchable. Available searchable attributes are: `id, title`.",
-                  "code": "invalid_search_attributes_to_search_on",
-                  "type": "invalid_request",
-                  "link": "https://docs.meilisearch.com/errors#invalid_search_attributes_to_search_on"
-                }
-                "###);
             },
         )
         .await;
@@ -1071,15 +1069,8 @@ async fn search_on_unknown_field_plus_joker() {
         .search(
             json!({"q": "Captain Marvel", "attributesToSearchOn": ["unknown", "*"]}),
             |response, code| {
-                snapshot!(code, @"400 Bad Request");
+                assert_eq!(response, expected_response);
-                snapshot!(json_string!(response), @r###"
+                assert_eq!(code, 400);
-                {
-                  "message": "Attribute `unknown` is not searchable. Available searchable attributes are: `id, title`.",
-                  "code": "invalid_search_attributes_to_search_on",
-                  "type": "invalid_request",
-                  "link": "https://docs.meilisearch.com/errors#invalid_search_attributes_to_search_on"
-                }
-                "###);
             },
         )
         .await;
@@ -1092,47 +1083,44 @@ async fn distinct_at_search_time() {
     let (task, _) = index.create(None).await;
     index.wait_task(task.uid()).await.succeeded();
 
+    let expected_response = json!({
+        "message": format!("Index `{}`: Attribute `doggo.truc` is not filterable and thus, cannot be used as distinct attribute. This index does not have configured filterable attributes.", index.uid),
+        "code": "invalid_search_distinct",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_search_distinct"
+    });
     let (response, code) =
         index.search_post(json!({"page": 0, "hitsPerPage": 2, "distinct": "doggo.truc"})).await;
-    snapshot!(code, @"400 Bad Request");
+    assert_eq!(response, expected_response);
-    snapshot!(response, @r###"
+    assert_eq!(code, 400);
-    {
-      "message": "Attribute `doggo.truc` is not filterable and thus, cannot be used as distinct attribute. This index does not have configured filterable attributes.",
-      "code": "invalid_search_distinct",
-      "type": "invalid_request",
-      "link": "https://docs.meilisearch.com/errors#invalid_search_distinct"
-    }
-    "###);
 
     let (task, _) = index.update_settings_filterable_attributes(json!(["color", "machin"])).await;
     index.wait_task(task.uid()).await;
 
+    let expected_response = json!({
+        "message": format!("Index `{}`: Attribute `doggo.truc` is not filterable and thus, cannot be used as distinct attribute. Available filterable attributes are: `color, machin`.", index.uid),
+        "code": "invalid_search_distinct",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_search_distinct"
+    });
     let (response, code) =
         index.search_post(json!({"page": 0, "hitsPerPage": 2, "distinct": "doggo.truc"})).await;
-    snapshot!(code, @"400 Bad Request");
+    assert_eq!(response, expected_response);
-    snapshot!(response, @r###"
+    assert_eq!(code, 400);
-    {
-      "message": "Attribute `doggo.truc` is not filterable and thus, cannot be used as distinct attribute. Available filterable attributes are: `color, machin`.",
-      "code": "invalid_search_distinct",
-      "type": "invalid_request",
-      "link": "https://docs.meilisearch.com/errors#invalid_search_distinct"
-    }
-    "###);
 
     let (task, _) = index.update_settings_displayed_attributes(json!(["color"])).await;
     index.wait_task(task.uid()).await;
 
+    let expected_response = json!({
+        "message": format!("Index `{}`: Attribute `doggo.truc` is not filterable and thus, cannot be used as distinct attribute. Available filterable attributes are: `color, <..hidden-attributes>`.", index.uid),
+        "code": "invalid_search_distinct",
+        "type": "invalid_request",
+        "link": "https://docs.meilisearch.com/errors#invalid_search_distinct"
+    });
     let (response, code) =
         index.search_post(json!({"page": 0, "hitsPerPage": 2, "distinct": "doggo.truc"})).await;
-    snapshot!(code, @"400 Bad Request");
+    assert_eq!(response, expected_response);
-    snapshot!(response, @r###"
+    assert_eq!(code, 400);
-    {
-      "message": "Attribute `doggo.truc` is not filterable and thus, cannot be used as distinct attribute. Available filterable attributes are: `color, <..hidden-attributes>`.",
-      "code": "invalid_search_distinct",
-      "type": "invalid_request",
-      "link": "https://docs.meilisearch.com/errors#invalid_search_distinct"
-    }
-    "###);
 
     let (response, code) =
         index.search_post(json!({"page": 0, "hitsPerPage": 2, "distinct": true})).await;

crates/meilisearch/tests/search/facet_search.rs

@@ -57,6 +57,116 @@ async fn simple_facet_search() {
     assert_eq!(response["facetHits"].as_array().unwrap().len(), 1);
 }
 
+#[actix_rt::test]
+async fn simple_facet_search_on_movies() {
+    let server = Server::new().await;
+    let index = server.index("test");
+
+    let documents = json!([
+      {
+        "id": 1,
+        "title": "Carol",
+        "genres": [
+          "Romance",
+          "Drama"
+        ],
+        "color": [
+          "red"
+        ],
+        "platforms": [
+          "MacOS",
+          "Linux",
+          "Windows"
+        ]
+      },
+      {
+        "id": 2,
+        "title": "Wonder Woman",
+        "genres": [
+          "Action",
+          "Adventure"
+        ],
+        "color": [
+          "green"
+        ],
+        "platforms": [
+          "MacOS"
+        ]
+      },
+      {
+        "id": 3,
+        "title": "Life of Pi",
+        "genres": [
+          "Adventure",
+          "Drama"
+        ],
+        "color": [
+          "blue"
+        ],
+        "platforms": [
+          "Windows"
+        ]
+      },
+      {
+        "id": 4,
+        "title": "Mad Max: Fury Road",
+        "genres": [
+          "Adventure",
+          "Science Fiction"
+        ],
+        "color": [
+          "red"
+        ],
+        "platforms": [
+          "MacOS",
+          "Linux"
+        ]
+      },
+      {
+        "id": 5,
+        "title": "Moana",
+        "genres": [
+          "Fantasy",
+          "Action"
+        ],
+        "color": [
+          "red"
+        ],
+        "platforms": [
+          "Windows"
+        ]
+      },
+      {
+        "id": 6,
+        "title": "Philadelphia",
+        "genres": [
+          "Drama"
+        ],
+        "color": [
+          "blue"
+        ],
+        "platforms": [
+          "MacOS",
+          "Linux",
+          "Windows"
+        ]
+      }
+    ]);
+    let (response, code) =
+        index.update_settings_filterable_attributes(json!(["genres", "color"])).await;
+    assert_eq!(202, code, "{:?}", response);
+    index.wait_task(response.uid()).await;
+
+    let (response, _code) = index.add_documents(documents, None).await;
+    index.wait_task(response.uid()).await;
+
+    let (response, code) =
+        index.facet_search(json!({"facetQuery": "", "facetName": "genres", "q": "" })).await;
+
+    assert_eq!(code, 200, "{}", response);
+    snapshot!(response["facetHits"], @r###"[{"value":"Action","count":2},{"value":"Adventure","count":3},{"value":"Drama","count":3},{"value":"Fantasy","count":1},{"value":"Romance","count":1},{"value":"Science Fiction","count":1}]"###);
+}
+
 #[actix_rt::test]
 async fn advanced_facet_search() {
     let server = Server::new().await;
@@ -221,8 +331,15 @@ async fn add_documents_and_deactivate_facet_search() {
     let (response, code) =
         index.facet_search(json!({"facetName": "genres", "facetQuery": "a"})).await;
 
-    assert_eq!(code, 200, "{}", response);
+    assert_eq!(code, 400, "{}", response);
-    assert_eq!(dbg!(response)["facetHits"].as_array().unwrap().len(), 0);
+    snapshot!(response, @r###"
+    {
+      "message": "The facet search is disabled for this index",
+      "code": "facet_search_disabled",
+      "type": "invalid_request",
+      "link": "https://docs.meilisearch.com/errors#facet_search_disabled"
+    }
+    "###);
 }
 
 #[actix_rt::test]
@@ -245,8 +362,15 @@ async fn deactivate_facet_search_and_add_documents() {
     let (response, code) =
         index.facet_search(json!({"facetName": "genres", "facetQuery": "a"})).await;
 
-    assert_eq!(code, 200, "{}", response);
+    assert_eq!(code, 400, "{}", response);
-    assert_eq!(dbg!(response)["facetHits"].as_array().unwrap().len(), 0);
+    snapshot!(response, @r###"
+    {
+      "message": "The facet search is disabled for this index",
+      "code": "facet_search_disabled",
+      "type": "invalid_request",
+      "link": "https://docs.meilisearch.com/errors#facet_search_disabled"
+    }
+    "###);
 }
 
 #[actix_rt::test]

crates/meilisearch/tests/search/multi.rs

@@ -1070,7 +1070,7 @@ async fn federation_one_query_error() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Inside `.queries[1]`: Attribute `title` is not filterable. This index does not have configured filterable attributes.\n1:6 title = toto",
+      "message": "Inside `.queries[1]`: Index `nested`: Attribute `title` is not filterable. This index does not have configured filterable attributes.\n1:6 title = toto",
       "code": "invalid_search_filter",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_search_filter"
@@ -1102,7 +1102,7 @@ async fn federation_one_query_sort_error() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Inside `.queries[1]`: Attribute `doggos` is not sortable. This index does not have configured sortable attributes.",
+      "message": "Inside `.queries[1]`: Index `nested`: Attribute `doggos` is not sortable. This index does not have configured sortable attributes.",
       "code": "invalid_search_sort",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_search_sort"
@@ -1166,7 +1166,7 @@ async fn federation_multiple_query_errors() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Inside `.queries[0]`: Attribute `title` is not filterable. This index does not have configured filterable attributes.\n1:6 title = toto",
+      "message": "Inside `.queries[0]`: Index `test`: Attribute `title` is not filterable. This index does not have configured filterable attributes.\n1:6 title = toto",
       "code": "invalid_search_filter",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_search_filter"
@@ -1198,7 +1198,7 @@ async fn federation_multiple_query_sort_errors() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Inside `.queries[0]`: Attribute `title` is not sortable. This index does not have configured sortable attributes.",
+      "message": "Inside `.queries[0]`: Index `test`: Attribute `title` is not sortable. This index does not have configured sortable attributes.",
       "code": "invalid_search_sort",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_search_sort"
@@ -1231,7 +1231,7 @@ async fn federation_multiple_query_errors_interleaved() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Inside `.queries[1]`: Attribute `doggos` is not filterable. This index does not have configured filterable attributes.\n1:7 doggos IN [intel, kefir]",
+      "message": "Inside `.queries[1]`: Index `nested`: Attribute `doggos` is not filterable. This index does not have configured filterable attributes.\n1:7 doggos IN [intel, kefir]",
       "code": "invalid_search_filter",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_search_filter"
@@ -1264,7 +1264,7 @@ async fn federation_multiple_query_sort_errors_interleaved() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Inside `.queries[1]`: Attribute `doggos` is not sortable. This index does not have configured sortable attributes.",
+      "message": "Inside `.queries[1]`: Index `nested`: Attribute `doggos` is not sortable. This index does not have configured sortable attributes.",
       "code": "invalid_search_sort",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_search_sort"

crates/meilisearch/tests/similar/errors.rs

@@ -79,7 +79,7 @@ async fn similar_bad_id() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Invalid value at `.id`: the value of `id` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 512 bytes.",
+      "message": "Invalid value at `.id`: the value of `id` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 511 bytes.",
       "code": "invalid_similar_id",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_similar_id"
@@ -172,7 +172,7 @@ async fn similar_invalid_id() {
     snapshot!(code, @"400 Bad Request");
     snapshot!(json_string!(response), @r###"
     {
-      "message": "Invalid value at `.id`: the value of `id` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 512 bytes.",
+      "message": "Invalid value at `.id`: the value of `id` is invalid. A document identifier can be of type integer or string, only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), and can not be more than 511 bytes.",
       "code": "invalid_similar_id",
       "type": "invalid_request",
       "link": "https://docs.meilisearch.com/errors#invalid_similar_id"

crates/meilisearch/tests/snapshot/mod.rs

@@ -129,11 +129,11 @@ async fn perform_on_demand_snapshot() {
 
     index.load_test_set().await;
 
-    server.index("doggo").create(Some("bone")).await;
+    let (task, _) = server.index("doggo").create(Some("bone")).await;
-    index.wait_task(2).await;
+    index.wait_task(task.uid()).await.succeeded();
 
-    server.index("doggo").create(Some("bone")).await;
+    let (task, _) = server.index("doggo").create(Some("bone")).await;
-    index.wait_task(2).await;
+    index.wait_task(task.uid()).await.failed();
 
     let (task, code) = server.create_snapshot().await;
     snapshot!(code, @"202 Accepted");

crates/meilisearch/tests/tasks/mod.rs

@@ -448,7 +448,7 @@ async fn test_summarized_delete_documents_by_filter() {
         "originalFilter": "\"doggo = bernese\""
       },
       "error": {
-        "message": "Attribute `doggo` is not filterable. This index does not have configured filterable attributes.\n1:6 doggo = bernese",
+        "message": "Index `test`: Attribute `doggo` is not filterable. This index does not have configured filterable attributes.\n1:6 doggo = bernese",
         "code": "invalid_document_filter",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_document_filter"

crates/meilisearch/tests/vector/binary_quantized.rs

@@ -318,7 +318,7 @@ async fn try_to_disable_binary_quantization() {
         }
       },
       "error": {
-        "message": "`.embedders.manual.binaryQuantized`: Cannot disable the binary quantization.\n - Note: Binary quantization is a lossy operation that cannot be reverted.\n - Hint: Add a new embedder that is non-quantized and regenerate the vectors.",
+        "message": "Index `doggo`: `.embedders.manual.binaryQuantized`: Cannot disable the binary quantization.\n - Note: Binary quantization is a lossy operation that cannot be reverted.\n - Hint: Add a new embedder that is non-quantized and regenerate the vectors.",
         "code": "invalid_settings_embedders",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_settings_embedders"

crates/meilisearch/tests/vector/mod.rs

@@ -250,7 +250,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Missing field `._vectors.manual.regenerate`\n  - note: `._vectors.manual` must be an array of floats, an array of arrays of floats, or an object with field `regenerate`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Missing field `._vectors.manual.regenerate`\n  - note: `._vectors.manual` must be an array of floats, an array of arrays of floats, or an object with field `regenerate`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -280,7 +280,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Missing field `._vectors.manual.regenerate`\n  - note: `._vectors.manual` must be an array of floats, an array of arrays of floats, or an object with field `regenerate`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Missing field `._vectors.manual.regenerate`\n  - note: `._vectors.manual` must be an array of floats, an array of arrays of floats, or an object with field `regenerate`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -311,7 +311,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Could not parse `._vectors.manual.regenerate`: invalid type: string \"yes please\", expected a boolean at line 1 column 26",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Could not parse `._vectors.manual.regenerate`: invalid type: string \"yes please\", expected a boolean at line 1 column 26",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -340,7 +340,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings`: expected null or an array, but found a boolean: `true`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings`: expected null or an array, but found a boolean: `true`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -369,7 +369,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[0]`: expected a number or an array, but found a boolean: `true`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[0]`: expected a number or an array, but found a boolean: `true`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -398,7 +398,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[0][0]`: expected a number, but found a boolean: `true`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[0][0]`: expected a number, but found a boolean: `true`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -440,7 +440,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[1]`: expected a number, but found an array: `[0.2,0.3]`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[1]`: expected a number, but found an array: `[0.2,0.3]`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -469,7 +469,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[1]`: expected an array, but found a number: `0.3`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[1]`: expected an array, but found a number: `0.3`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -498,7 +498,7 @@ async fn user_provided_embeddings_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[0][1]`: expected a number, but found a boolean: `true`",
+        "message": "Index `doggo`: Bad embedder configuration in the document with id: `0`. Invalid value type at `._vectors.manual.embeddings[0][1]`: expected a number, but found a boolean: `true`",
         "code": "invalid_vectors_type",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#invalid_vectors_type"
@@ -539,7 +539,7 @@ async fn user_provided_vectors_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "While embedding documents for embedder `manual`: no vectors provided for document `40` and at least 4 other document(s)\n- Note: `manual` has `source: userProvided`, so documents must provide embeddings as an array in `_vectors.manual`.\n- Hint: opt-out for a document with `_vectors.manual: null`",
+        "message": "Index `doggo`: While embedding documents for embedder `manual`: no vectors provided for document `40` and at least 4 other document(s)\n- Note: `manual` has `source: userProvided`, so documents must provide embeddings as an array in `_vectors.manual`.\n- Hint: opt-out for a document with `_vectors.manual: null`",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -569,7 +569,7 @@ async fn user_provided_vectors_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "While embedding documents for embedder `manual`: no vectors provided for document `42`\n- Note: `manual` has `source: userProvided`, so documents must provide embeddings as an array in `_vectors.manual`.\n- Hint: try replacing `_vector` by `_vectors` in 1 document(s).",
+        "message": "Index `doggo`: While embedding documents for embedder `manual`: no vectors provided for document `42`\n- Note: `manual` has `source: userProvided`, so documents must provide embeddings as an array in `_vectors.manual`.\n- Hint: try replacing `_vector` by `_vectors` in 1 document(s).",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -599,7 +599,7 @@ async fn user_provided_vectors_error() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "While embedding documents for embedder `manual`: no vectors provided for document `42`\n- Note: `manual` has `source: userProvided`, so documents must provide embeddings as an array in `_vectors.manual`.\n- Hint: try replacing `_vectors.manaul` by `_vectors.manual` in 1 document(s).",
+        "message": "Index `doggo`: While embedding documents for embedder `manual`: no vectors provided for document `42`\n- Note: `manual` has `source: userProvided`, so documents must provide embeddings as an array in `_vectors.manual`.\n- Hint: try replacing `_vectors.manaul` by `_vectors.manual` in 1 document(s).",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"

crates/meilisearch/tests/vector/openai.rs

@@ -713,7 +713,7 @@ async fn bad_api_key() {
         }
       },
       "error": {
-        "message": "While embedding documents for embedder `default`: user error: could not authenticate against OpenAI server\n  - server replied with `{\"error\":{\"message\":\"Incorrect API key provided: Bearer doggo. You can find your API key at https://platform.openai.com/account/api-keys.\",\"type\":\"invalid_request_error\",\"param\":null,\"code\":\"invalid_api_key\"}}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration, and the `MEILI_OPENAI_API_KEY` and `OPENAI_API_KEY` environment variables",
+        "message": "Index `doggo`: While embedding documents for embedder `default`: user error: could not authenticate against OpenAI server\n  - server replied with `{\"error\":{\"message\":\"Incorrect API key provided: Bearer doggo. You can find your API key at https://platform.openai.com/account/api-keys.\",\"type\":\"invalid_request_error\",\"param\":null,\"code\":\"invalid_api_key\"}}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration, and the `MEILI_OPENAI_API_KEY` and `OPENAI_API_KEY` environment variables",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -757,7 +757,7 @@ async fn bad_api_key() {
         }
       },
       "error": {
-        "message": "While embedding documents for embedder `default`: user error: could not authenticate against OpenAI server\n  - server replied with `{\"error\":{\"message\":\"You didn't provide an API key. You need to provide your API key in an Authorization header using Bearer auth (i.e. Authorization: Bearer YOUR_KEY), or as the password field (with blank username) if you're accessing the API from your browser and are prompted for a username and password. You can obtain an API key from https://platform.openai.com/account/api-keys.\",\"type\":\"invalid_request_error\",\"param\":null,\"code\":null}}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration, and the `MEILI_OPENAI_API_KEY` and `OPENAI_API_KEY` environment variables",
+        "message": "Index `doggo`: While embedding documents for embedder `default`: user error: could not authenticate against OpenAI server\n  - server replied with `{\"error\":{\"message\":\"You didn't provide an API key. You need to provide your API key in an Authorization header using Bearer auth (i.e. Authorization: Bearer YOUR_KEY), or as the password field (with blank username) if you're accessing the API from your browser and are prompted for a username and password. You can obtain an API key from https://platform.openai.com/account/api-keys.\",\"type\":\"invalid_request_error\",\"param\":null,\"code\":null}}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration, and the `MEILI_OPENAI_API_KEY` and `OPENAI_API_KEY` environment variables",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"

crates/meilisearch/tests/vector/rest.rs

@@ -985,7 +985,7 @@ async fn bad_settings() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response`, while extracting a single \"{{embedding}}\", expected `response` to be an array of numbers, but failed to parse server response:\n  - invalid type: map, expected a sequence",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response`, while extracting a single \"{{embedding}}\", expected `response` to be an array of numbers, but failed to parse server response:\n  - invalid type: map, expected a sequence",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1025,7 +1025,7 @@ async fn bad_settings() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "While embedding documents for embedder `rest`: runtime error: was expecting embeddings of dimension `2`, got embeddings of dimensions `3`",
+        "message": "Index `doggo`: While embedding documents for embedder `rest`: runtime error: was expecting embeddings of dimension `2`, got embeddings of dimensions `3`",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1178,7 +1178,7 @@ async fn server_returns_bad_request() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with user error: sent a bad request to embedding server\n  - Hint: check that the `request` in the embedder configuration matches the remote server's API\n  - server replied with `{\"error\":\"Invalid request: invalid type: string \\\"test\\\", expected struct MultipleRequest at line 1 column 6\"}`",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with user error: sent a bad request to embedding server\n  - Hint: check that the `request` in the embedder configuration matches the remote server's API\n  - server replied with `{\"error\":\"Invalid request: invalid type: string \\\"test\\\", expected struct MultipleRequest at line 1 column 6\"}`",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1247,7 +1247,7 @@ async fn server_returns_bad_request() {
         "indexedDocuments": 0
       },
       "error": {
-        "message": "While embedding documents for embedder `rest`: user error: sent a bad request to embedding server\n  - Hint: check that the `request` in the embedder configuration matches the remote server's API\n  - server replied with `{\"error\":\"Invalid request: invalid type: string \\\"name: kefir\\\\n\\\", expected struct MultipleRequest at line 1 column 15\"}`",
+        "message": "Index `doggo`: While embedding documents for embedder `rest`: user error: sent a bad request to embedding server\n  - Hint: check that the `request` in the embedder configuration matches the remote server's API\n  - server replied with `{\"error\":\"Invalid request: invalid type: string \\\"name: kefir\\\\n\\\", expected struct MultipleRequest at line 1 column 15\"}`",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1306,7 +1306,7 @@ async fn server_returns_bad_response() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response`, while extracting the array of \"{{embedding}}\"s, configuration expects `response` to be an array with at least 1 item(s) but server sent an object with 1 field(s)",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response`, while extracting the array of \"{{embedding}}\"s, configuration expects `response` to be an array with at least 1 item(s) but server sent an object with 1 field(s)",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1362,7 +1362,7 @@ async fn server_returns_bad_response() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response`, while extracting item #0 from the array of \"{{embedding}}\"s, expected `response` to be an array of numbers, but failed to parse server response:\n  - invalid type: map, expected a sequence",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response`, while extracting item #0 from the array of \"{{embedding}}\"s, expected `response` to be an array of numbers, but failed to parse server response:\n  - invalid type: map, expected a sequence",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1414,7 +1414,7 @@ async fn server_returns_bad_response() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response.output`, while extracting a single \"{{embedding}}\", expected `output` to be an array of numbers, but failed to parse server response:\n  - invalid type: map, expected f32",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response.output`, while extracting a single \"{{embedding}}\", expected `output` to be an array of numbers, but failed to parse server response:\n  - invalid type: map, expected f32",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1478,7 +1478,7 @@ async fn server_returns_bad_response() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response.embedding`, while extracting item #0 from the array of \"{{embedding}}\"s, configuration expects `embedding` to be an object with key `data` but server sent an array of size 3",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response.embedding`, while extracting item #0 from the array of \"{{embedding}}\"s, configuration expects `embedding` to be an object with key `data` but server sent an array of size 3",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1542,7 +1542,7 @@ async fn server_returns_bad_response() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response.output[0]`, while extracting a single \"{{embedding}}\", configuration expects key \"embeddings\", which is missing in response\n  - Hint: item #0 inside `output` has key `embedding`, did you mean `response.output[0].embedding` in embedder configuration?",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with runtime error: error extracting embeddings from the response:\n  - in `response.output[0]`, while extracting a single \"{{embedding}}\", configuration expects key \"embeddings\", which is missing in response\n  - Hint: item #0 inside `output` has key `embedding`, did you mean `response.output[0].embedding` in embedder configuration?",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1908,7 +1908,7 @@ async fn server_custom_header() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with user error: could not authenticate against embedding server\n  - server replied with `{\"error\":\"missing header 'my-nonstandard-auth'\"}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with user error: could not authenticate against embedding server\n  - server replied with `{\"error\":\"missing header 'my-nonstandard-auth'\"}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -1951,7 +1951,7 @@ async fn server_custom_header() {
         }
       },
       "error": {
-        "message": "Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with user error: could not authenticate against embedding server\n  - server replied with `{\"error\":\"thou shall not pass, Balrog\"}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration",
+        "message": "Index `doggo`: Error while generating embeddings: runtime error: could not determine model dimensions:\n  - test embedding failed with user error: could not authenticate against embedding server\n  - server replied with `{\"error\":\"thou shall not pass, Balrog\"}`\n  - Hint: Check the `apiKey` parameter in the embedder configuration",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
@@ -2099,7 +2099,7 @@ async fn searchable_reindex() {
         ]
       },
       "error": {
-        "message": "While embedding documents for embedder `rest`: error: received unexpected HTTP 404 from embedding server\n  - server replied with `{\"error\":\"text not found\",\"text\":\"breed: patou\\n\"}`",
+        "message": "Index `doggo`: While embedding documents for embedder `rest`: error: received unexpected HTTP 404 from embedding server\n  - server replied with `{\"error\":\"text not found\",\"text\":\"breed: patou\\n\"}`",
         "code": "vector_embedding_error",
         "type": "invalid_request",
         "link": "https://docs.meilisearch.com/errors#vector_embedding_error"

crates/meilitool/Cargo.toml

@@ -10,12 +10,15 @@ license.workspace = true
 
 [dependencies]
 anyhow = "1.0.86"
+arroy_v04_to_v05 = { package = "arroy", git = "https://github.com/meilisearch/arroy/", tag = "DO-NOT-DELETE-upgrade-v04-to-v05" }
 clap = { version = "4.5.9", features = ["derive"] }
 dump = { path = "../dump" }
 file-store = { path = "../file-store" }
+indexmap = {version = "2.7.0", features = ["serde"]}
 meilisearch-auth = { path = "../meilisearch-auth" }
 meilisearch-types = { path = "../meilisearch-types" }
 serde = { version = "1.0.209", features = ["derive"] }
+serde_json = {version = "1.0.133", features = ["preserve_order"]}
+tempfile = "3.14.0"
 time = { version = "0.3.36", features = ["formatting", "parsing", "alloc"] }
 uuid = { version = "1.10.0", features = ["v4"], default-features = false }
-arroy_v04_to_v05 = { package = "arroy", git = "https://github.com/meilisearch/arroy/", tag = "DO-NOT-DELETE-upgrade-v04-to-v05" }

crates/meilitool/src/main.rs

@@ -73,7 +73,7 @@ enum Command {
     ///
     /// Supported upgrade paths:
     ///
-    /// - v1.9.x -> v1.10.x -> v1.11.x
+    /// - v1.9.x -> v1.10.x -> v1.11.x -> v1.12.x
     OfflineUpgrade {
         #[arg(long)]
         target_version: String,

crates/meilitool/src/upgrade/mod.rs

@@ -1,13 +1,14 @@
 mod v1_10;
 mod v1_11;
+mod v1_12;
 mod v1_9;
 
 use std::path::{Path, PathBuf};
 
 use anyhow::{bail, Context};
 use meilisearch_types::versioning::create_version_file;
-
 use v1_10::v1_9_to_v1_10;
+use v1_12::v1_11_to_v1_12;
 
 use crate::upgrade::v1_11::v1_10_to_v1_11;
 
@@ -22,6 +23,7 @@ impl OfflineUpgrade {
         let upgrade_list = [
             (v1_9_to_v1_10 as fn(&Path) -> Result<(), anyhow::Error>, "1", "10", "0"),
             (v1_10_to_v1_11, "1", "11", "0"),
+            (v1_11_to_v1_12, "1", "12", "0"),
         ];
 
         let (current_major, current_minor, current_patch) = &self.current_version;
@@ -33,6 +35,7 @@ impl OfflineUpgrade {
         ) {
             ("1", "9", _) => 0,
             ("1", "10", _) => 1,
+            ("1", "11", _) => 2,
             _ => {
                 bail!("Unsupported current version {current_major}.{current_minor}.{current_patch}. Can only upgrade from v1.9 and v1.10")
             }
@@ -43,6 +46,7 @@ impl OfflineUpgrade {
         let ends_at = match (target_major.as_str(), target_minor.as_str(), target_patch.as_str()) {
             ("1", "10", _) => 0,
             ("1", "11", _) => 1,
+            ("1", "12", _) => 2,
             (major, _, _) if major.starts_with('v') => {
                 bail!("Target version must not starts with a `v`. Instead of writing `v1.9.0` write `1.9.0` for example.")
             }

crates/meilitool/src/upgrade/v1_10.rs

@@ -1,18 +1,13 @@
-use anyhow::bail;
 use std::path::Path;
 
-use anyhow::Context;
+use anyhow::{bail, Context};
-use meilisearch_types::{
+use meilisearch_types::heed::types::{SerdeJson, Str};
-    heed::{
+use meilisearch_types::heed::{Database, Env, EnvOpenOptions, RoTxn, RwTxn, Unspecified};
-        types::{SerdeJson, Str},
+use meilisearch_types::milli::index::{db_name, main_key};
-        Database, Env, EnvOpenOptions, RoTxn, RwTxn, Unspecified,
-    },
-    milli::index::{db_name, main_key},
-};
-
-use crate::{try_opening_database, try_opening_poly_database, uuid_codec::UuidCodec};
 
 use super::v1_9;
+use crate::uuid_codec::UuidCodec;
+use crate::{try_opening_database, try_opening_poly_database};
 
 pub type FieldDistribution = std::collections::BTreeMap<String, u64>;
 

crates/meilitool/src/upgrade/v1_11.rs

@@ -7,12 +7,12 @@
 use std::path::Path;
 
 use anyhow::Context;
-use meilisearch_types::{
+use meilisearch_types::heed::types::Str;
-    heed::{types::Str, Database, EnvOpenOptions},
+use meilisearch_types::heed::{Database, EnvOpenOptions};
-    milli::index::db_name,
+use meilisearch_types::milli::index::db_name;
-};
 
-use crate::{try_opening_database, try_opening_poly_database, uuid_codec::UuidCodec};
+use crate::uuid_codec::UuidCodec;
+use crate::{try_opening_database, try_opening_poly_database};
 
 pub fn v1_10_to_v1_11(db_path: &Path) -> anyhow::Result<()> {
     println!("Upgrading from v1.10.0 to v1.11.0");

crates/meilitool/src/upgrade/v1_12.rs

@@ -0,0 +1,79 @@
+//! The breaking changes that happened between the v1.11 and the v1.12 are:
+//! - The new indexer changed the update files format from OBKV to ndjson. https://github.com/meilisearch/meilisearch/pull/4900
+
+use std::io::BufWriter;
+use std::path::Path;
+
+use anyhow::Context;
+use file_store::FileStore;
+use indexmap::IndexMap;
+use meilisearch_types::milli::documents::DocumentsBatchReader;
+use serde_json::value::RawValue;
+use tempfile::NamedTempFile;
+
+pub fn v1_11_to_v1_12(db_path: &Path) -> anyhow::Result<()> {
+    println!("Upgrading from v1.11.0 to v1.12.0");
+
+    convert_update_files(db_path)?;
+
+    Ok(())
+}
+
+/// Convert the update files from OBKV to ndjson format.
+///
+/// 1) List all the update files using the file store.
+/// 2) For each update file, read the update file into a DocumentsBatchReader.
+/// 3) For each document in the update file, convert the document to a JSON object.
+/// 4) Write the JSON object to a tmp file in the update files directory.
+/// 5) Persist the tmp file replacing the old update file.
+fn convert_update_files(db_path: &Path) -> anyhow::Result<()> {
+    let update_files_dir_path = db_path.join("update_files");
+    let file_store = FileStore::new(&update_files_dir_path).with_context(|| {
+        format!("while creating file store for update files dir {update_files_dir_path:?}")
+    })?;
+
+    for uuid in file_store.all_uuids().context("while retrieving uuids from file store")? {
+        let uuid = uuid.context("while retrieving uuid from file store")?;
+        let update_file_path = file_store.get_update_path(uuid);
+        let update_file = file_store
+            .get_update(uuid)
+            .with_context(|| format!("while getting update file for uuid {uuid:?}"))?;
+
+        let mut file =
+            NamedTempFile::new_in(&update_files_dir_path).map(BufWriter::new).with_context(
+                || format!("while creating bufwriter for update file {update_file_path:?}"),
+            )?;
+
+        let reader = DocumentsBatchReader::from_reader(update_file).with_context(|| {
+            format!("while creating documents batch reader for update file {update_file_path:?}")
+        })?;
+        let (mut cursor, index) = reader.into_cursor_and_fields_index();
+
+        while let Some(document) = cursor.next_document().with_context(|| {
+            format!(
+                "while reading documents from batch reader for update file {update_file_path:?}"
+            )
+        })? {
+            let mut json_document = IndexMap::new();
+            for (fid, value) in document {
+                let field_name = index
+                    .name(fid)
+                    .with_context(|| format!("while getting field name for fid {fid} for update file {update_file_path:?}"))?;
+                let value: &RawValue = serde_json::from_slice(value)?;
+                json_document.insert(field_name, value);
+            }
+
+            serde_json::to_writer(&mut file, &json_document)?;
+        }
+
+        let file = file.into_inner().map_err(|e| e.into_error()).context(format!(
+            "while flushing update file bufwriter for update file {update_file_path:?}"
+        ))?;
+        let _ = file
+            // atomically replace the obkv file with the rewritten NDJSON file
+            .persist(&update_file_path)
+            .with_context(|| format!("while persisting update file {update_file_path:?}"))?;
+    }
+
+    Ok(())
+}

crates/milli/Cargo.toml

@@ -91,8 +91,8 @@ ureq = { version = "2.10.0", features = ["json"] }
 url = "2.5.2"
 rayon-par-bridge = "0.1.0"
 hashbrown = "0.15.0"
-raw-collections = { git = "https://github.com/meilisearch/raw-collections.git", version = "0.1.0" }
 bumpalo = "3.16.0"
+bumparaw-collections = "0.1.2"
 thread_local = "1.1.8"
 allocator-api2 = "0.2.18"
 rustc-hash = "2.0.0"

crates/milli/src/documents/primary_key.rs

@@ -280,7 +280,7 @@ fn starts_with(selector: &str, key: &str) -> bool {
 
 pub fn validate_document_id_str(document_id: &str) -> Option<&str> {
     if document_id.is_empty()
-        || document_id.len() > 512
+        || document_id.len() >= 512
         || !document_id.chars().all(|c| c.is_ascii_alphanumeric() || c == '-' || c == '_')
     {
         None

crates/milli/src/error.rs

@@ -114,7 +114,7 @@ pub enum UserError {
         "Document identifier `{}` is invalid. \
 A document identifier can be of type integer or string, \
 only composed of alphanumeric characters (a-z A-Z 0-9), hyphens (-) and underscores (_), \
-and can not be more than 512 bytes.", .document_id.to_string()
+and can not be more than 511 bytes.", .document_id.to_string()
     )]
     InvalidDocumentId { document_id: Value },
     #[error("Invalid facet distribution, {}", format_invalid_filter_distribution(.invalid_facets_name, .valid_facets_name))]

crates/milli/src/index.rs

@@ -1734,6 +1734,7 @@ pub(crate) mod tests {
 
     use crate::error::{Error, InternalError};
     use crate::index::{DEFAULT_MIN_WORD_LEN_ONE_TYPO, DEFAULT_MIN_WORD_LEN_TWO_TYPOS};
+    use crate::progress::Progress;
     use crate::update::new::indexer;
     use crate::update::settings::InnerIndexSettings;
     use crate::update::{
@@ -1810,7 +1811,7 @@ pub(crate) mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )?;
 
             if let Some(error) = operation_stats.into_iter().find_map(|stat| stat.error) {
@@ -1829,7 +1830,7 @@ pub(crate) mod tests {
                     &document_changes,
                     embedders,
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
             })
             .unwrap()?;
@@ -1901,7 +1902,7 @@ pub(crate) mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )?;
 
             if let Some(error) = operation_stats.into_iter().find_map(|stat| stat.error) {
@@ -1920,7 +1921,7 @@ pub(crate) mod tests {
                     &document_changes,
                     embedders,
                     &|| false,
-                    &|_| (),
+                    &Progress::default(),
                 )
             })
             .unwrap()?;
@@ -1982,7 +1983,7 @@ pub(crate) mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2001,7 +2002,7 @@ pub(crate) mod tests {
                     &document_changes,
                     embedders,
                     &|| should_abort.load(Relaxed),
-                    &|_| (),
+                    &Progress::default(),
                 )
             })
             .unwrap()

crates/milli/src/lib.rs

@@ -31,6 +31,7 @@ pub mod vector;
 #[macro_use]
 pub mod snapshot_tests;
 mod fieldids_weights_map;
+pub mod progress;
 
 use std::collections::{BTreeMap, HashMap};
 use std::convert::{TryFrom, TryInto};

crates/milli/src/progress.rs

@@ -0,0 +1,152 @@
+use std::any::TypeId;
+use std::borrow::Cow;
+use std::sync::atomic::{AtomicU32, Ordering};
+use std::sync::{Arc, RwLock};
+
+use serde::Serialize;
+
+pub trait Step: 'static + Send + Sync {
+    fn name(&self) -> Cow<'static, str>;
+    fn current(&self) -> u32;
+    fn total(&self) -> u32;
+}
+
+#[derive(Clone, Default)]
+pub struct Progress {
+    steps: Arc<RwLock<Vec<(TypeId, Box<dyn Step>)>>>,
+}
+
+impl Progress {
+    pub fn update_progress<P: Step>(&self, sub_progress: P) {
+        let mut steps = self.steps.write().unwrap();
+        let step_type = TypeId::of::<P>();
+        if let Some(idx) = steps.iter().position(|(id, _)| *id == step_type) {
+            steps.truncate(idx);
+        }
+        steps.push((step_type, Box::new(sub_progress)));
+    }
+
+    // TODO: This code should be in meilisearch_types but cannot because milli can't depend on meilisearch_types
+    pub fn as_progress_view(&self) -> ProgressView {
+        let steps = self.steps.read().unwrap();
+
+        let mut percentage = 0.0;
+        let mut prev_factors = 1.0;
+
+        let mut step_view = Vec::with_capacity(steps.len());
+        for (_, step) in steps.iter() {
+            prev_factors *= step.total() as f32;
+            percentage += step.current() as f32 / prev_factors;
+
+            step_view.push(ProgressStepView {
+                current_step: step.name(),
+                finished: step.current(),
+                total: step.total(),
+            });
+        }
+
+        ProgressView { steps: step_view, percentage: percentage * 100.0 }
+    }
+}
+
+/// This trait lets you use the AtomicSubStep defined right below.
+/// The name must be a const that never changed but that can't be enforced by the type system because it make the trait non object-safe.
+/// By forcing the Default trait + the &'static str we make it harder to miss-use the trait.
+pub trait NamedStep: 'static + Send + Sync + Default {
+    fn name(&self) -> &'static str;
+}
+
+/// Structure to quickly define steps that need very quick, lockless updating of their current step.
+/// You can use this struct if:
+/// - The name of the step doesn't change
+/// - The total number of steps doesn't change
+pub struct AtomicSubStep<Name: NamedStep> {
+    unit_name: Name,
+    current: Arc<AtomicU32>,
+    total: u32,
+}
+
+impl<Name: NamedStep> AtomicSubStep<Name> {
+    pub fn new(total: u32) -> (Arc<AtomicU32>, Self) {
+        let current = Arc::new(AtomicU32::new(0));
+        (current.clone(), Self { current, total, unit_name: Name::default() })
+    }
+}
+
+impl<Name: NamedStep> Step for AtomicSubStep<Name> {
+    fn name(&self) -> Cow<'static, str> {
+        self.unit_name.name().into()
+    }
+
+    fn current(&self) -> u32 {
+        self.current.load(Ordering::Relaxed)
+    }
+
+    fn total(&self) -> u32 {
+        self.total
+    }
+}
+
+#[macro_export]
+macro_rules! make_enum_progress {
+    ($visibility:vis enum $name:ident { $($variant:ident,)+ }) => {
+        #[repr(u8)]
+        #[derive(Debug, Clone, Copy, PartialEq, Eq, Sequence)]
+        #[allow(clippy::enum_variant_names)]
+        $visibility enum $name {
+            $($variant),+
+        }
+
+        impl Step for $name {
+            fn name(&self) -> Cow<'static, str> {
+                use convert_case::Casing;
+
+                match self {
+                    $(
+                        $name::$variant => stringify!($variant).from_case(convert_case::Case::Camel).to_case(convert_case::Case::Lower).into()
+                    ),+
+                }
+            }
+
+            fn current(&self) -> u32 {
+                *self as u32
+            }
+
+            fn total(&self) -> u32 {
+                Self::CARDINALITY as u32
+            }
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! make_atomic_progress {
+    ($struct_name:ident alias $atomic_struct_name:ident => $step_name:literal) => {
+        #[derive(Default, Debug, Clone, Copy)]
+        pub struct $struct_name {}
+        impl NamedStep for $struct_name {
+            fn name(&self) -> &'static str {
+                $step_name
+            }
+        }
+        pub type $atomic_struct_name = AtomicSubStep<$struct_name>;
+    };
+}
+
+make_atomic_progress!(Document alias AtomicDocumentStep => "document" );
+make_atomic_progress!(Payload alias AtomicPayloadStep => "payload" );
+
+#[derive(Debug, Serialize, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct ProgressView {
+    pub steps: Vec<ProgressStepView>,
+    pub percentage: f32,
+}
+
+#[derive(Debug, Serialize, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct ProgressStepView {
+    pub current_step: Cow<'static, str>,
+    pub finished: u32,
+    pub total: u32,
+}

crates/milli/src/prompt/document.rs

@@ -3,12 +3,13 @@ use std::collections::BTreeMap;
 use std::fmt::{self, Debug};
 
 use bumpalo::Bump;
+use bumparaw_collections::{RawMap, RawVec, Value};
 use liquid::model::{
     ArrayView, DisplayCow, KString, KStringCow, ObjectRender, ObjectSource, ScalarCow, State,
     Value as LiquidValue,
 };
 use liquid::{ObjectView, ValueView};
-use raw_collections::{RawMap, RawVec};
+use rustc_hash::FxBuildHasher;
 use serde_json::value::RawValue;
 
 use crate::update::del_add::{DelAdd, KvReaderDelAdd};
@@ -195,7 +196,7 @@ impl<'doc, D: DocumentTrait<'doc> + Debug> ObjectView for ParseableDocument<'doc
 }
 
 impl<'doc, D: DocumentTrait<'doc> + Debug> ValueView for ParseableDocument<'doc, D> {
-    fn as_debug(&self) -> &dyn fmt::Debug {
+    fn as_debug(&self) -> &dyn Debug {
         self
     }
     fn render(&self) -> liquid::model::DisplayCow<'_> {
@@ -243,14 +244,13 @@ impl<'doc, D: DocumentTrait<'doc> + Debug> ValueView for ParseableDocument<'doc,
     }
 }
 
-#[derive(Debug)]
 struct ParseableValue<'doc> {
-    value: raw_collections::Value<'doc>,
+    value: Value<'doc, FxBuildHasher>,
 }
 
 impl<'doc> ParseableValue<'doc> {
     pub fn new(value: &'doc RawValue, doc_alloc: &'doc Bump) -> Self {
-        let value = raw_collections::Value::from_raw_value(value, doc_alloc).unwrap();
+        let value = Value::from_raw_value_and_hasher(value, FxBuildHasher, doc_alloc).unwrap();
         Self { value }
     }
 
@@ -260,19 +260,19 @@ impl<'doc> ParseableValue<'doc> {
 }
 
 // transparent newtype for implementing ValueView
-#[repr(transparent)]
 #[derive(Debug)]
-struct ParseableMap<'doc>(RawMap<'doc>);
+#[repr(transparent)]
+struct ParseableMap<'doc>(RawMap<'doc, FxBuildHasher>);
 
 // transparent newtype for implementing ValueView
-#[repr(transparent)]
 #[derive(Debug)]
+#[repr(transparent)]
 struct ParseableArray<'doc>(RawVec<'doc>);
 
 impl<'doc> ParseableMap<'doc> {
-    pub fn as_parseable<'a>(map: &'a RawMap<'doc>) -> &'a ParseableMap<'doc> {
+    pub fn as_parseable<'a>(map: &'a RawMap<'doc, FxBuildHasher>) -> &'a ParseableMap<'doc> {
         // SAFETY: repr(transparent)
-        unsafe { &*(map as *const RawMap as *const Self) }
+        unsafe { &*(map as *const RawMap<FxBuildHasher> as *const Self) }
     }
 }
 
@@ -447,8 +447,9 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn render(&self) -> DisplayCow<'_> {
-        use raw_collections::value::Number;
+        use bumparaw_collections::value::Number;
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Null => LiquidValue::Nil.render(),
             Value::Bool(v) => v.render(),
@@ -464,8 +465,9 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn source(&self) -> DisplayCow<'_> {
-        use raw_collections::value::Number;
+        use bumparaw_collections::value::Number;
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Null => LiquidValue::Nil.source(),
             Value::Bool(v) => ValueView::source(v),
@@ -481,8 +483,9 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn type_name(&self) -> &'static str {
-        use raw_collections::value::Number;
+        use bumparaw_collections::value::Number;
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Null => LiquidValue::Nil.type_name(),
             Value::Bool(v) => v.type_name(),
@@ -498,7 +501,8 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn query_state(&self, state: State) -> bool {
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Null => ValueView::query_state(&LiquidValue::Nil, state),
             Value::Bool(v) => ValueView::query_state(v, state),
@@ -515,7 +519,8 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn to_kstr(&self) -> KStringCow<'_> {
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Null => ValueView::to_kstr(&LiquidValue::Nil),
             Value::Bool(v) => ValueView::to_kstr(v),
@@ -527,12 +532,14 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn to_value(&self) -> LiquidValue {
-        use raw_collections::Value;
+        use bumparaw_collections::value::Number;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Null => LiquidValue::Nil,
             Value::Bool(v) => LiquidValue::Scalar(liquid::model::ScalarCow::new(*v)),
             Value::Number(number) => match number {
-                raw_collections::value::Number::PosInt(number) => {
+                Number::PosInt(number) => {
                     let number: i64 = match (*number).try_into() {
                         Ok(number) => number,
                         Err(_) => {
@@ -541,12 +548,8 @@ impl<'doc> ValueView for ParseableValue<'doc> {
                     };
                     LiquidValue::Scalar(ScalarCow::new(number))
                 }
-                raw_collections::value::Number::NegInt(number) => {
+                Number::NegInt(number) => LiquidValue::Scalar(ScalarCow::new(*number)),
-                    LiquidValue::Scalar(ScalarCow::new(*number))
+                Number::Finite(number) => LiquidValue::Scalar(ScalarCow::new(*number)),
-                }
-                raw_collections::value::Number::Finite(number) => {
-                    LiquidValue::Scalar(ScalarCow::new(*number))
-                }
             },
             Value::String(s) => LiquidValue::Scalar(liquid::model::ScalarCow::new(s.to_string())),
             Value::Array(raw_vec) => ParseableArray::as_parseable(raw_vec).to_value(),
@@ -555,8 +558,9 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn as_scalar(&self) -> Option<liquid::model::ScalarCow<'_>> {
-        use raw_collections::value::Number;
+        use bumparaw_collections::value::Number;
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         match &self.value {
             Value::Bool(v) => Some(liquid::model::ScalarCow::new(*v)),
             Value::Number(number) => match number {
@@ -576,34 +580,41 @@ impl<'doc> ValueView for ParseableValue<'doc> {
     }
 
     fn is_scalar(&self) -> bool {
-        use raw_collections::Value;
+        use bumparaw_collections::Value;
+
         matches!(&self.value, Value::Bool(_) | Value::Number(_) | Value::String(_))
     }
 
     fn as_array(&self) -> Option<&dyn liquid::model::ArrayView> {
-        if let raw_collections::Value::Array(array) = &self.value {
+        if let Value::Array(array) = &self.value {
             return Some(ParseableArray::as_parseable(array) as _);
         }
         None
     }
 
     fn is_array(&self) -> bool {
-        matches!(&self.value, raw_collections::Value::Array(_))
+        matches!(&self.value, bumparaw_collections::Value::Array(_))
     }
 
     fn as_object(&self) -> Option<&dyn ObjectView> {
-        if let raw_collections::Value::Object(object) = &self.value {
+        if let Value::Object(object) = &self.value {
             return Some(ParseableMap::as_parseable(object) as _);
         }
         None
     }
 
     fn is_object(&self) -> bool {
-        matches!(&self.value, raw_collections::Value::Object(_))
+        matches!(&self.value, bumparaw_collections::Value::Object(_))
     }
 
     fn is_nil(&self) -> bool {
-        matches!(&self.value, raw_collections::Value::Null)
+        matches!(&self.value, bumparaw_collections::Value::Null)
+    }
+}
+
+impl Debug for ParseableValue<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("ParseableValue").field("value", &self.value).finish()
     }
 }
 

crates/milli/src/prompt/error.rs

@@ -38,6 +38,16 @@ pub struct RenderPromptError {
     pub fault: FaultSource,
 }
 impl RenderPromptError {
+    pub(crate) fn missing_context_with_external_docid(
+        external_docid: String,
+        inner: liquid::Error,
+    ) -> RenderPromptError {
+        Self {
+            kind: RenderPromptErrorKind::MissingContextWithExternalDocid(external_docid, inner),
+            fault: FaultSource::User,
+        }
+    }
+
     pub(crate) fn missing_context(inner: liquid::Error) -> RenderPromptError {
         Self { kind: RenderPromptErrorKind::MissingContext(inner), fault: FaultSource::User }
     }
@@ -47,6 +57,8 @@ impl RenderPromptError {
 pub enum RenderPromptErrorKind {
     #[error("missing field in document: {0}")]
     MissingContext(liquid::Error),
+    #[error("missing field in document `{0}`: {1}")]
+    MissingContextWithExternalDocid(String, liquid::Error),
 }
 
 impl From<RenderPromptError> for crate::Error {

crates/milli/src/prompt/mod.rs

@@ -119,6 +119,7 @@ impl Prompt {
         'doc: 'a, // lifetime of the allocator, will live for an entire chunk of documents
     >(
         &self,
+        external_docid: &str,
         document: impl crate::update::new::document::Document<'a> + Debug,
         field_id_map: &RefCell<GlobalFieldsIdsMap>,
         doc_alloc: &'doc Bump,
@@ -130,9 +131,12 @@ impl Prompt {
             self.max_bytes.unwrap_or_else(default_max_bytes).get(),
             doc_alloc,
         );
-        self.template
+        self.template.render_to(&mut rendered, &context).map_err(|liquid_error| {
-            .render_to(&mut rendered, &context)
+            RenderPromptError::missing_context_with_external_docid(
-            .map_err(RenderPromptError::missing_context)?;
+                external_docid.to_owned(),
+                liquid_error,
+            )
+        })?;
         Ok(std::str::from_utf8(rendered.into_bump_slice())
             .expect("render can only write UTF-8 because all inputs and processing preserve utf-8"))
     }

crates/milli/src/search/new/tests/integration.rs

@@ -5,6 +5,7 @@ use bumpalo::Bump;
 use heed::EnvOpenOptions;
 use maplit::{btreemap, hashset};
 
+use crate::progress::Progress;
 use crate::update::new::indexer;
 use crate::update::{IndexDocumentsMethod, IndexerConfig, Settings};
 use crate::vector::EmbeddingConfigs;
@@ -72,7 +73,7 @@ pub fn setup_search_index_with_criteria(criteria: &[Criterion]) -> Index {
             None,
             &mut new_fields_ids_map,
             &|| false,
-            &|_progress| (),
+            Progress::default(),
         )
         .unwrap();
 
@@ -91,7 +92,7 @@ pub fn setup_search_index_with_criteria(criteria: &[Criterion]) -> Index {
         &document_changes,
         embedders,
         &|| false,
-        &|_| (),
+        &Progress::default(),
     )
     .unwrap();
 

crates/milli/src/update/facet/mod.rs

@@ -79,22 +79,29 @@ pub const FACET_MIN_LEVEL_SIZE: u8 = 5;
 use std::collections::BTreeSet;
 use std::fs::File;
 use std::io::BufReader;
+use std::ops::Bound;
 
 use grenad::Merger;
 use heed::types::{Bytes, DecodeIgnore};
+use heed::BytesDecode as _;
+use roaring::RoaringBitmap;
 use time::OffsetDateTime;
 use tracing::debug;
 
 use self::incremental::FacetsUpdateIncremental;
 use super::{FacetsUpdateBulk, MergeDeladdBtreesetString, MergeDeladdCboRoaringBitmaps};
 use crate::facet::FacetType;
-use crate::heed_codec::facet::{FacetGroupKey, FacetGroupKeyCodec, FacetGroupValueCodec};
+use crate::heed_codec::facet::{
+    FacetGroupKey, FacetGroupKeyCodec, FacetGroupValueCodec, OrderedF64Codec,
+};
 use crate::heed_codec::BytesRefCodec;
+use crate::search::facet::get_highest_level;
 use crate::update::del_add::{DelAdd, KvReaderDelAdd};
 use crate::{try_split_array_at, FieldId, Index, Result};
 
 pub mod bulk;
 pub mod incremental;
+pub mod new_incremental;
 
 /// A builder used to add new elements to the `facet_id_string_docids` or `facet_id_f64_docids` databases.
 ///
@@ -646,3 +653,194 @@ mod comparison_bench {
         }
     }
 }
+
+/// Run sanity checks on the specified fid tree
+///
+/// 1. No "orphan" child value, any child value has a parent
+/// 2. Any docid in the child appears in the parent
+/// 3. No docid in the parent is missing from all its children
+/// 4. no group is bigger than max_group_size
+/// 5. Less than 50% of groups are bigger than group_size
+/// 6. group size matches the number of children
+/// 7. max_level is < 255
+pub(crate) fn sanity_checks(
+    index: &Index,
+    rtxn: &heed::RoTxn,
+    field_id: FieldId,
+    facet_type: FacetType,
+    group_size: usize,
+    _min_level_size: usize, // might add a check on level size later
+    max_group_size: usize,
+) -> Result<()> {
+    tracing::info!(%field_id, ?facet_type, "performing sanity checks");
+    let database = match facet_type {
+        FacetType::String => {
+            index.facet_id_string_docids.remap_key_type::<FacetGroupKeyCodec<BytesRefCodec>>()
+        }
+        FacetType::Number => {
+            index.facet_id_f64_docids.remap_key_type::<FacetGroupKeyCodec<BytesRefCodec>>()
+        }
+    };
+
+    let leaf_prefix: FacetGroupKey<&[u8]> = FacetGroupKey { field_id, level: 0, left_bound: &[] };
+
+    let leaf_it = database.prefix_iter(rtxn, &leaf_prefix)?;
+
+    let max_level = get_highest_level(rtxn, database, field_id)?;
+    if max_level == u8::MAX {
+        panic!("max_level == 255");
+    }
+
+    for leaf in leaf_it {
+        let (leaf_facet_value, leaf_docids) = leaf?;
+        let mut current_level = 0;
+
+        let mut current_parent_facet_value: Option<FacetGroupKey<&[u8]>> = None;
+        let mut current_parent_docids: Option<crate::heed_codec::facet::FacetGroupValue> = None;
+        loop {
+            current_level += 1;
+            if current_level >= max_level {
+                break;
+            }
+            let parent_key_right_bound = FacetGroupKey {
+                field_id,
+                level: current_level,
+                left_bound: leaf_facet_value.left_bound,
+            };
+            let (parent_facet_value, parent_docids) = database
+                .get_lower_than_or_equal_to(rtxn, &parent_key_right_bound)?
+                .expect("no parent found");
+            if parent_facet_value.level != current_level {
+                panic!(
+                    "wrong parent level, found_level={}, expected_level={}",
+                    parent_facet_value.level, current_level
+                );
+            }
+            if parent_facet_value.field_id != field_id {
+                panic!("wrong parent fid");
+            }
+            if parent_facet_value.left_bound > leaf_facet_value.left_bound {
+                panic!("wrong parent left bound");
+            }
+
+            if !leaf_docids.bitmap.is_subset(&parent_docids.bitmap) {
+                panic!(
+                    "missing docids from leaf in parent, current_level={}, parent={}, child={}, missing={missing:?}, child_len={}, child={:?}",
+                    current_level,
+                    facet_to_string(parent_facet_value.left_bound, facet_type),
+                    facet_to_string(leaf_facet_value.left_bound, facet_type),
+                    leaf_docids.bitmap.len(),
+                    leaf_docids.bitmap.clone(),
+                    missing=leaf_docids.bitmap - parent_docids.bitmap,
+                )
+            }
+
+            if let Some(current_parent_facet_value) = current_parent_facet_value {
+                if current_parent_facet_value.field_id != parent_facet_value.field_id {
+                    panic!("wrong parent parent fid");
+                }
+                if current_parent_facet_value.level + 1 != parent_facet_value.level {
+                    panic!("wrong parent parent level");
+                }
+                if current_parent_facet_value.left_bound < parent_facet_value.left_bound {
+                    panic!("wrong parent parent left bound");
+                }
+            }
+
+            if let Some(current_parent_docids) = current_parent_docids {
+                if !current_parent_docids.bitmap.is_subset(&parent_docids.bitmap) {
+                    panic!("missing docids from intermediate node in parent, parent_level={}, parent={}, intermediate={}, missing={missing:?}, intermediate={:?}",
+                    parent_facet_value.level,
+                    facet_to_string(parent_facet_value.left_bound, facet_type),
+                    facet_to_string(current_parent_facet_value.unwrap().left_bound, facet_type),
+                    current_parent_docids.bitmap.clone(),
+                    missing=current_parent_docids.bitmap - parent_docids.bitmap,
+                    );
+                }
+            }
+
+            current_parent_facet_value = Some(parent_facet_value);
+            current_parent_docids = Some(parent_docids);
+        }
+    }
+    tracing::info!(%field_id, ?facet_type, "checked all leaves");
+
+    let mut current_level = max_level;
+    let mut greater_than_group = 0usize;
+    let mut total = 0usize;
+    loop {
+        if current_level == 0 {
+            break;
+        }
+        let child_level = current_level - 1;
+        tracing::info!(%field_id, ?facet_type, %current_level, "checked groups for level");
+        let level_groups_prefix: FacetGroupKey<&[u8]> =
+            FacetGroupKey { field_id, level: current_level, left_bound: &[] };
+        let mut level_groups_it = database.prefix_iter(rtxn, &level_groups_prefix)?.peekable();
+
+        'group_it: loop {
+            let Some(group) = level_groups_it.next() else { break 'group_it };
+
+            let (group_facet_value, group_docids) = group?;
+            let child_left_bound = group_facet_value.left_bound.to_owned();
+            let mut expected_docids = RoaringBitmap::new();
+            let mut expected_size = 0usize;
+            let right_bound = level_groups_it
+                .peek()
+                .and_then(|res| res.as_ref().ok())
+                .map(|(key, _)| key.left_bound);
+            let child_left_bound = FacetGroupKey {
+                field_id,
+                level: child_level,
+                left_bound: child_left_bound.as_slice(),
+            };
+            let child_left_bound = Bound::Included(&child_left_bound);
+            let child_right_bound;
+            let child_right_bound = if let Some(right_bound) = right_bound {
+                child_right_bound =
+                    FacetGroupKey { field_id, level: child_level, left_bound: right_bound };
+                Bound::Excluded(&child_right_bound)
+            } else {
+                Bound::Unbounded
+            };
+            let children = database.range(rtxn, &(child_left_bound, child_right_bound))?;
+            for child in children {
+                let (child_facet_value, child_docids) = child?;
+                if child_facet_value.field_id != field_id {
+                    break;
+                }
+                if child_facet_value.level != child_level {
+                    break;
+                }
+                expected_size += 1;
+                expected_docids |= &child_docids.bitmap;
+            }
+            assert_eq!(expected_size, group_docids.size as usize);
+            assert!(expected_size <= max_group_size);
+            assert_eq!(expected_docids, group_docids.bitmap);
+            total += 1;
+            if expected_size > group_size {
+                greater_than_group += 1;
+            }
+        }
+
+        current_level -= 1;
+    }
+    if greater_than_group * 2 > total {
+        panic!("too many groups have a size > group_size");
+    }
+
+    tracing::info!("sanity checks OK");
+
+    Ok(())
+}
+
+fn facet_to_string(facet_value: &[u8], facet_type: FacetType) -> String {
+    match facet_type {
+        FacetType::String => bstr::BStr::new(facet_value).to_string(),
+        FacetType::Number => match OrderedF64Codec::bytes_decode(facet_value) {
+            Ok(value) => value.to_string(),
+            Err(e) => format!("error: {e} (bytes: {facet_value:?}"),
+        },
+    }
+}

crates/milli/src/update/facet/new_incremental.rs

@@ -0,0 +1,498 @@
+use std::ops::Bound;
+
+use heed::types::{Bytes, DecodeIgnore};
+use heed::{BytesDecode as _, Database, RwTxn};
+use roaring::RoaringBitmap;
+
+use crate::facet::FacetType;
+use crate::heed_codec::facet::{
+    FacetGroupKey, FacetGroupKeyCodec, FacetGroupValue, FacetGroupValueCodec,
+};
+use crate::heed_codec::BytesRefCodec;
+use crate::search::facet::get_highest_level;
+use crate::update::valid_facet_value;
+use crate::{FieldId, Index, Result};
+
+pub struct FacetsUpdateIncremental {
+    inner: FacetsUpdateIncrementalInner,
+    delta_data: Vec<FacetFieldIdChange>,
+}
+
+struct FacetsUpdateIncrementalInner {
+    db: Database<FacetGroupKeyCodec<BytesRefCodec>, FacetGroupValueCodec>,
+    field_id: FieldId,
+    group_size: u8,
+    min_level_size: u8,
+    max_group_size: u8,
+}
+
+impl FacetsUpdateIncremental {
+    pub fn new(
+        index: &Index,
+        facet_type: FacetType,
+        field_id: FieldId,
+        delta_data: Vec<FacetFieldIdChange>,
+        group_size: u8,
+        min_level_size: u8,
+        max_group_size: u8,
+    ) -> Self {
+        FacetsUpdateIncremental {
+            inner: FacetsUpdateIncrementalInner {
+                db: match facet_type {
+                    FacetType::String => index
+                        .facet_id_string_docids
+                        .remap_key_type::<FacetGroupKeyCodec<BytesRefCodec>>(),
+                    FacetType::Number => index
+                        .facet_id_f64_docids
+                        .remap_key_type::<FacetGroupKeyCodec<BytesRefCodec>>(),
+                },
+                field_id,
+                group_size,
+                min_level_size,
+                max_group_size,
+            },
+
+            delta_data,
+        }
+    }
+
+    #[tracing::instrument(level = "trace", skip_all, target = "indexing::facets::incremental")]
+    pub fn execute(mut self, wtxn: &mut RwTxn) -> Result<()> {
+        if self.delta_data.is_empty() {
+            return Ok(());
+        }
+        self.delta_data.sort_unstable_by(
+            |FacetFieldIdChange { facet_value: left, .. },
+             FacetFieldIdChange { facet_value: right, .. }| {
+                left.cmp(right)
+                    // sort in **reverse** lexicographic order
+                    .reverse()
+            },
+        );
+
+        self.inner.find_changed_parents(wtxn, self.delta_data)?;
+
+        self.inner.add_or_delete_level(wtxn)
+    }
+}
+
+impl FacetsUpdateIncrementalInner {
+    /// WARNING: `changed_children` must be sorted in **reverse** lexicographic order.
+    fn find_changed_parents(
+        &self,
+        wtxn: &mut RwTxn,
+        mut changed_children: Vec<FacetFieldIdChange>,
+    ) -> Result<()> {
+        let mut changed_parents = vec![];
+        for child_level in 0u8..u8::MAX {
+            // child_level < u8::MAX by construction
+            let parent_level = child_level + 1;
+            let parent_level_left_bound: FacetGroupKey<&[u8]> =
+                FacetGroupKey { field_id: self.field_id, level: parent_level, left_bound: &[] };
+
+            let mut last_parent: Option<Box<[u8]>> = None;
+            let mut child_it = changed_children
+                // drain all changed children
+                .drain(..)
+                // keep only children whose value is valid in the LMDB sense
+                .filter(|child| valid_facet_value(&child.facet_value));
+            // `while let` rather than `for` because we advance `child_it` inside of the loop
+            'current_level: while let Some(child) = child_it.next() {
+                if let Some(last_parent) = &last_parent {
+                    if &child.facet_value >= last_parent {
+                        self.compute_parent_group(wtxn, child_level, child.facet_value)?;
+                        continue 'current_level;
+                    }
+                }
+
+                // need to find a new parent
+                let parent_key_prefix = FacetGroupKey {
+                    field_id: self.field_id,
+                    level: parent_level,
+                    left_bound: &*child.facet_value,
+                };
+
+                let parent = self
+                    .db
+                    .remap_data_type::<DecodeIgnore>()
+                    .rev_range(
+                        wtxn,
+                        &(
+                            Bound::Excluded(&parent_level_left_bound),
+                            Bound::Included(&parent_key_prefix),
+                        ),
+                    )?
+                    .next();
+
+                match parent {
+                    Some(Ok((parent_key, _parent_value))) => {
+                        // found parent, cache it for next keys
+                        last_parent = Some(parent_key.left_bound.to_owned().into_boxed_slice());
+
+                        // add to modified list for parent level
+                        changed_parents.push(FacetFieldIdChange {
+                            facet_value: parent_key.left_bound.to_owned().into_boxed_slice(),
+                        });
+                        self.compute_parent_group(wtxn, child_level, child.facet_value)?;
+                    }
+                    Some(Err(err)) => return Err(err.into()),
+                    None => {
+                        // no parent for that key
+                        let mut parent_it = self
+                            .db
+                            .remap_data_type::<DecodeIgnore>()
+                            .prefix_iter_mut(wtxn, &parent_level_left_bound)?;
+                        match parent_it.next() {
+                            // 1. left of the current left bound, or
+                            Some(Ok((first_key, _first_value))) => {
+                                // make sure we don't spill on the neighboring fid (level also included defensively)
+                                if first_key.field_id != self.field_id
+                                    || first_key.level != parent_level
+                                {
+                                    // max level reached, exit
+                                    drop(parent_it);
+                                    self.compute_parent_group(
+                                        wtxn,
+                                        child_level,
+                                        child.facet_value,
+                                    )?;
+                                    for child in child_it.by_ref() {
+                                        self.compute_parent_group(
+                                            wtxn,
+                                            child_level,
+                                            child.facet_value,
+                                        )?;
+                                    }
+                                    return Ok(());
+                                }
+                                // remove old left bound
+                                unsafe { parent_it.del_current()? };
+                                drop(parent_it);
+                                changed_parents.push(FacetFieldIdChange {
+                                    facet_value: child.facet_value.clone(),
+                                });
+                                self.compute_parent_group(wtxn, child_level, child.facet_value)?;
+                                // pop all elements in order to visit the new left bound
+                                let new_left_bound =
+                                    &mut changed_parents.last_mut().unwrap().facet_value;
+                                for child in child_it.by_ref() {
+                                    new_left_bound.clone_from(&child.facet_value);
+
+                                    self.compute_parent_group(
+                                        wtxn,
+                                        child_level,
+                                        child.facet_value,
+                                    )?;
+                                }
+                            }
+                            Some(Err(err)) => return Err(err.into()),
+                            // 2. max level reached, exit
+                            None => {
+                                drop(parent_it);
+                                self.compute_parent_group(wtxn, child_level, child.facet_value)?;
+                                for child in child_it.by_ref() {
+                                    self.compute_parent_group(
+                                        wtxn,
+                                        child_level,
+                                        child.facet_value,
+                                    )?;
+                                }
+                                return Ok(());
+                            }
+                        }
+                    }
+                }
+            }
+            if changed_parents.is_empty() {
+                return Ok(());
+            }
+            drop(child_it);
+            std::mem::swap(&mut changed_children, &mut changed_parents);
+            // changed_parents is now empty because changed_children was emptied by the drain
+        }
+        Ok(())
+    }
+
+    fn compute_parent_group(
+        &self,
+        wtxn: &mut RwTxn<'_>,
+        parent_level: u8,
+        parent_left_bound: Box<[u8]>,
+    ) -> Result<()> {
+        let mut range_left_bound: Vec<u8> = parent_left_bound.into();
+        if parent_level == 0 {
+            return Ok(());
+        }
+        let child_level = parent_level - 1;
+
+        let parent_key = FacetGroupKey {
+            field_id: self.field_id,
+            level: parent_level,
+            left_bound: &*range_left_bound,
+        };
+        let child_right_bound = self
+            .db
+            .remap_data_type::<DecodeIgnore>()
+            .get_greater_than(wtxn, &parent_key)?
+            .and_then(
+                |(
+                    FacetGroupKey {
+                        level: right_level,
+                        field_id: right_fid,
+                        left_bound: right_bound,
+                    },
+                    _,
+                )| {
+                    if parent_level != right_level || self.field_id != right_fid {
+                        // there was a greater key, but with a greater level or fid, so not a sibling to the parent: ignore
+                        return None;
+                    }
+                    Some(right_bound.to_owned())
+                },
+            );
+        let child_right_bound = match &child_right_bound {
+            Some(right_bound) => Bound::Excluded(FacetGroupKey {
+                left_bound: right_bound.as_slice(),
+                field_id: self.field_id,
+                level: child_level,
+            }),
+            None => Bound::Unbounded,
+        };
+
+        let child_left_key = FacetGroupKey {
+            field_id: self.field_id,
+            level: child_level,
+            left_bound: &*range_left_bound,
+        };
+        let mut child_left_bound = Bound::Included(child_left_key);
+
+        loop {
+            // do a first pass on the range to find the number of children
+            let child_count = self
+                .db
+                .remap_data_type::<DecodeIgnore>()
+                .range(wtxn, &(child_left_bound, child_right_bound))?
+                .take(self.max_group_size as usize * 2)
+                .count();
+            let mut child_it = self.db.range(wtxn, &(child_left_bound, child_right_bound))?;
+
+            // pick the right group_size depending on the number of children
+            let group_size = if child_count >= self.max_group_size as usize * 2 {
+                // more than twice the max_group_size => there will be space for at least 2 groups of max_group_size
+                self.max_group_size as usize
+            } else if child_count >= self.group_size as usize {
+                // size in [group_size, max_group_size * 2[
+                // divided by 2 it is between [group_size / 2, max_group_size[
+                // this ensures that the tree is balanced
+                child_count / 2
+            } else {
+                // take everything
+                child_count
+            };
+
+            let res: Result<_> = child_it
+                .by_ref()
+                .take(group_size)
+                // stop if we go to the next level or field id
+                .take_while(|res| match res {
+                    Ok((child_key, _)) => {
+                        child_key.field_id == self.field_id && child_key.level == child_level
+                    }
+                    Err(_) => true,
+                })
+                .try_fold(
+                    (None, FacetGroupValue { size: 0, bitmap: Default::default() }),
+                    |(bounds, mut group_value), child_res| {
+                        let (child_key, child_value) = child_res?;
+                        let bounds = match bounds {
+                            Some((left_bound, _)) => Some((left_bound, child_key.left_bound)),
+                            None => Some((child_key.left_bound, child_key.left_bound)),
+                        };
+                        // max_group_size <= u8::MAX
+                        group_value.size += 1;
+                        group_value.bitmap |= &child_value.bitmap;
+                        Ok((bounds, group_value))
+                    },
+                );
+
+            let (bounds, group_value) = res?;
+
+            let Some((group_left_bound, right_bound)) = bounds else {
+                let update_key = FacetGroupKey {
+                    field_id: self.field_id,
+                    level: parent_level,
+                    left_bound: &*range_left_bound,
+                };
+                drop(child_it);
+                if let Bound::Included(_) = child_left_bound {
+                    self.db.delete(wtxn, &update_key)?;
+                }
+
+                break;
+            };
+
+            drop(child_it);
+            let current_left_bound = group_left_bound.to_owned();
+
+            let delete_old_bound = match child_left_bound {
+                Bound::Included(bound) => {
+                    if bound.left_bound != current_left_bound {
+                        Some(range_left_bound.clone())
+                    } else {
+                        None
+                    }
+                }
+                _ => None,
+            };
+
+            range_left_bound.clear();
+            range_left_bound.extend_from_slice(right_bound);
+            let child_left_key = FacetGroupKey {
+                field_id: self.field_id,
+                level: child_level,
+                left_bound: range_left_bound.as_slice(),
+            };
+            child_left_bound = Bound::Excluded(child_left_key);
+
+            if let Some(old_bound) = delete_old_bound {
+                let update_key = FacetGroupKey {
+                    field_id: self.field_id,
+                    level: parent_level,
+                    left_bound: old_bound.as_slice(),
+                };
+                self.db.delete(wtxn, &update_key)?;
+            }
+
+            let update_key = FacetGroupKey {
+                field_id: self.field_id,
+                level: parent_level,
+                left_bound: current_left_bound.as_slice(),
+            };
+            if group_value.bitmap.is_empty() {
+                self.db.delete(wtxn, &update_key)?;
+            } else {
+                self.db.put(wtxn, &update_key, &group_value)?;
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Check whether the highest level has exceeded `min_level_size` * `self.group_size`.
+    /// If it has, we must build an addition level above it.
+    /// Then check whether the highest level is under `min_level_size`.
+    /// If it has, we must remove the complete level.
+    pub(crate) fn add_or_delete_level(&self, txn: &mut RwTxn<'_>) -> Result<()> {
+        let highest_level = get_highest_level(txn, self.db, self.field_id)?;
+        let mut highest_level_prefix = vec![];
+        highest_level_prefix.extend_from_slice(&self.field_id.to_be_bytes());
+        highest_level_prefix.push(highest_level);
+
+        let size_highest_level =
+            self.db.remap_types::<Bytes, Bytes>().prefix_iter(txn, &highest_level_prefix)?.count();
+
+        if size_highest_level >= self.group_size as usize * self.min_level_size as usize {
+            self.add_level(txn, highest_level, &highest_level_prefix, size_highest_level)
+        } else if size_highest_level < self.min_level_size as usize && highest_level != 0 {
+            self.delete_level(txn, &highest_level_prefix)
+        } else {
+            Ok(())
+        }
+    }
+
+    /// Delete a level.
+    fn delete_level(&self, txn: &mut RwTxn<'_>, highest_level_prefix: &[u8]) -> Result<()> {
+        let mut to_delete = vec![];
+        let mut iter =
+            self.db.remap_types::<Bytes, Bytes>().prefix_iter(txn, highest_level_prefix)?;
+        for el in iter.by_ref() {
+            let (k, _) = el?;
+            to_delete.push(
+                FacetGroupKeyCodec::<BytesRefCodec>::bytes_decode(k)
+                    .map_err(heed::Error::Encoding)?
+                    .into_owned(),
+            );
+        }
+        drop(iter);
+        for k in to_delete {
+            self.db.delete(txn, &k.as_ref())?;
+        }
+        Ok(())
+    }
+
+    /// Build an additional level for the field id.
+    fn add_level(
+        &self,
+        txn: &mut RwTxn<'_>,
+        highest_level: u8,
+        highest_level_prefix: &[u8],
+        size_highest_level: usize,
+    ) -> Result<()> {
+        let mut groups_iter = self
+            .db
+            .remap_types::<Bytes, FacetGroupValueCodec>()
+            .prefix_iter(txn, highest_level_prefix)?;
+
+        let nbr_new_groups = size_highest_level / self.group_size as usize;
+        let nbr_leftover_elements = size_highest_level % self.group_size as usize;
+
+        let mut to_add = vec![];
+        for _ in 0..nbr_new_groups {
+            let mut first_key = None;
+            let mut values = RoaringBitmap::new();
+            for _ in 0..self.group_size {
+                let (key_bytes, value_i) = groups_iter.next().unwrap()?;
+                let key_i = FacetGroupKeyCodec::<BytesRefCodec>::bytes_decode(key_bytes)
+                    .map_err(heed::Error::Encoding)?;
+
+                if first_key.is_none() {
+                    first_key = Some(key_i);
+                }
+                values |= value_i.bitmap;
+            }
+            let key = FacetGroupKey {
+                field_id: self.field_id,
+                level: highest_level + 1,
+                left_bound: first_key.unwrap().left_bound,
+            };
+            let value = FacetGroupValue { size: self.group_size, bitmap: values };
+            to_add.push((key.into_owned(), value));
+        }
+        // now we add the rest of the level, in case its size is > group_size * min_level_size
+        // this can indeed happen if the min_level_size parameter changes between two calls to `insert`
+        if nbr_leftover_elements > 0 {
+            let mut first_key = None;
+            let mut values = RoaringBitmap::new();
+            for _ in 0..nbr_leftover_elements {
+                let (key_bytes, value_i) = groups_iter.next().unwrap()?;
+                let key_i = FacetGroupKeyCodec::<BytesRefCodec>::bytes_decode(key_bytes)
+                    .map_err(heed::Error::Encoding)?;
+
+                if first_key.is_none() {
+                    first_key = Some(key_i);
+                }
+                values |= value_i.bitmap;
+            }
+            let key = FacetGroupKey {
+                field_id: self.field_id,
+                level: highest_level + 1,
+                left_bound: first_key.unwrap().left_bound,
+            };
+            // Note: nbr_leftover_elements can be casted to a u8 since it is bounded by `max_group_size`
+            // when it is created above.
+            let value = FacetGroupValue { size: nbr_leftover_elements as u8, bitmap: values };
+            to_add.push((key.into_owned(), value));
+        }
+
+        drop(groups_iter);
+        for (key, value) in to_add {
+            self.db.put(txn, &key.as_ref(), &value)?;
+        }
+        Ok(())
+    }
+}
+
+#[derive(Debug)]
+pub struct FacetFieldIdChange {
+    pub facet_value: Box<[u8]>,
+}

crates/milli/src/update/index_documents/helpers/mod.rs

@@ -10,10 +10,14 @@ use fst::{IntoStreamer, Streamer};
 pub use grenad_helpers::*;
 pub use merge_functions::*;
 
-use crate::MAX_WORD_LENGTH;
+use crate::MAX_LMDB_KEY_LENGTH;
 
 pub fn valid_lmdb_key(key: impl AsRef<[u8]>) -> bool {
-    key.as_ref().len() <= MAX_WORD_LENGTH * 2 && !key.as_ref().is_empty()
+    key.as_ref().len() <= MAX_LMDB_KEY_LENGTH - 3 && !key.as_ref().is_empty()
+}
+
+pub fn valid_facet_value(facet_value: impl AsRef<[u8]>) -> bool {
+    facet_value.as_ref().len() <= MAX_LMDB_KEY_LENGTH - 3 && !facet_value.as_ref().is_empty()
 }
 
 /// Divides one slice into two at an index, returns `None` if mid is out of bounds.

crates/milli/src/update/index_documents/mod.rs

@@ -766,6 +766,7 @@ mod tests {
     use crate::documents::mmap_from_objects;
     use crate::index::tests::TempIndex;
     use crate::index::IndexEmbeddingConfig;
+    use crate::progress::Progress;
     use crate::search::TermsMatchingStrategy;
     use crate::update::new::indexer;
     use crate::update::Setting;
@@ -1964,7 +1965,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2148,7 +2149,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2163,7 +2164,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2210,7 +2211,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2225,7 +2226,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2263,7 +2264,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2278,7 +2279,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2315,7 +2316,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2330,7 +2331,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2369,7 +2370,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2384,7 +2385,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2428,7 +2429,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2443,7 +2444,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2480,7 +2481,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2495,7 +2496,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2532,7 +2533,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2547,7 +2548,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2726,7 +2727,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2741,7 +2742,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2785,7 +2786,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2800,7 +2801,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();
@@ -2841,7 +2842,7 @@ mod tests {
                 None,
                 &mut new_fields_ids_map,
                 &|| false,
-                &|_progress| (),
+                Progress::default(),
             )
             .unwrap();
 
@@ -2856,7 +2857,7 @@ mod tests {
             &document_changes,
             embedders,
             &|| false,
-            &|_| (),
+            &Progress::default(),
         )
         .unwrap();
         wtxn.commit().unwrap();

crates/milli/src/update/index_documents/snapshots/mod.rs/geo_filtered_placeholder_search_should_not_return_deleted_documents/facet_id_f64_docids.snap

@@ -1,5 +1,5 @@
 ---
-source: milli/src/update/index_documents/mod.rs
+source: crates/milli/src/update/index_documents/mod.rs
 ---
 3   0  48.9021 1  [19, ]
 3   0  49.9314 1  [17, ]
@@ -15,6 +15,11 @@ source: milli/src/update/index_documents/mod.rs
 3   0  50.7453 1  [7, ]
 3   0  50.8466 1  [10, ]
 3   0  51.0537 1  [9, ]
+3   1  48.9021 2  [17, 19, ]
+3   1  50.1793 3  [13, 14, 15, ]
+3   1  50.4502 4  [0, 3, 8, 12, ]
+3   1  50.6312 2  [1, 2, ]
+3   1  50.7453 3  [7, 9, 10, ]
 4   0  2.271  1  [17, ]
 4   0  2.3708 1  [19, ]
 4   0  2.7637 1  [14, ]
@@ -28,4 +33,3 @@ source: milli/src/update/index_documents/mod.rs
 4   0  3.6957 1  [9, ]
 4   0  3.9623 1  [12, ]
 4   0  4.337  1  [10, ]
-

crates/milli/src/update/new/document.rs

@@ -1,7 +1,8 @@
 use std::collections::{BTreeMap, BTreeSet};
 
+use bumparaw_collections::RawMap;
 use heed::RoTxn;
-use raw_collections::RawMap;
+use rustc_hash::FxBuildHasher;
 use serde_json::value::RawValue;
 
 use super::vector_document::VectorDocument;
@@ -385,12 +386,12 @@ pub type Entry<'doc> = (&'doc str, &'doc RawValue);
 
 #[derive(Debug)]
 pub struct Versions<'doc> {
-    data: RawMap<'doc>,
+    data: RawMap<'doc, FxBuildHasher>,
 }
 
 impl<'doc> Versions<'doc> {
     pub fn multiple(
-        mut versions: impl Iterator<Item = Result<RawMap<'doc>>>,
+        mut versions: impl Iterator<Item = Result<RawMap<'doc, FxBuildHasher>>>,
     ) -> Result<Option<Self>> {
         let Some(data) = versions.next() else { return Ok(None) };
         let mut data = data?;
@@ -403,7 +404,7 @@ impl<'doc> Versions<'doc> {
         Ok(Some(Self::single(data)))
     }
 
-    pub fn single(version: RawMap<'doc>) -> Self {
+    pub fn single(version: RawMap<'doc, FxBuildHasher>) -> Self {
         Self { data: version }
     }
 

crates/milli/src/update/new/document_change.rs

@@ -1,7 +1,10 @@
 use bumpalo::Bump;
 use heed::RoTxn;
 
-use super::document::{DocumentFromDb, DocumentFromVersions, MergedDocument, Versions};
+use super::document::{
+    Document as _, DocumentFromDb, DocumentFromVersions, MergedDocument, Versions,
+};
+use super::extract::perm_json_p;
 use super::vector_document::{
     MergedVectorDocument, VectorDocumentFromDb, VectorDocumentFromVersions,
 };
@@ -164,6 +167,80 @@ impl<'doc> Update<'doc> {
         }
     }
 
+    /// Returns whether the updated version of the document is different from the current version for the passed subset of fields.
+    ///
+    /// `true` if at least one top-level-field that is a exactly a member of field or a parent of a member of field changed.
+    /// Otherwise `false`.
+    pub fn has_changed_for_fields<'t, Mapper: FieldIdMapper>(
+        &self,
+        fields: Option<&[&str]>,
+        rtxn: &'t RoTxn,
+        index: &'t Index,
+        mapper: &'t Mapper,
+    ) -> Result<bool> {
+        let mut changed = false;
+        let mut cached_current = None;
+        let mut updated_selected_field_count = 0;
+
+        for entry in self.updated().iter_top_level_fields() {
+            let (key, updated_value) = entry?;
+
+            if perm_json_p::select_field(key, fields, &[]) == perm_json_p::Selection::Skip {
+                continue;
+            }
+
+            updated_selected_field_count += 1;
+            let current = match cached_current {
+                Some(current) => current,
+                None => self.current(rtxn, index, mapper)?,
+            };
+            let current_value = current.top_level_field(key)?;
+            let Some(current_value) = current_value else {
+                changed = true;
+                break;
+            };
+
+            if current_value.get() != updated_value.get() {
+                changed = true;
+                break;
+            }
+            cached_current = Some(current);
+        }
+
+        if !self.has_deletion {
+            // no field deletion, so fields that don't appear in `updated` cannot have changed
+            return Ok(changed);
+        }
+
+        if changed {
+            return Ok(true);
+        }
+
+        // we saw all updated fields, and set `changed` if any field wasn't in `current`.
+        // so if there are as many fields in `current` as in `updated`, then nothing changed.
+        // If there is any more fields in `current`, then they are missing in `updated`.
+        let has_deleted_fields = {
+            let current = match cached_current {
+                Some(current) => current,
+                None => self.current(rtxn, index, mapper)?,
+            };
+
+            let mut current_selected_field_count = 0;
+            for entry in current.iter_top_level_fields() {
+                let (key, _) = entry?;
+
+                if perm_json_p::select_field(key, fields, &[]) == perm_json_p::Selection::Skip {
+                    continue;
+                }
+                current_selected_field_count += 1;
+            }
+
+            current_selected_field_count != updated_selected_field_count
+        };
+
+        Ok(has_deleted_fields)
+    }
+
     pub fn updated_vectors(
         &self,
         doc_alloc: &'doc Bump,

crates/milli/src/update/new/extract/cache.rs

@@ -69,12 +69,12 @@ use std::io::BufReader;
 use std::{io, iter, mem};
 
 use bumpalo::Bump;
+use bumparaw_collections::bbbul::{BitPacker, BitPacker4x};
+use bumparaw_collections::map::FrozenMap;
+use bumparaw_collections::{Bbbul, FrozenBbbul};
 use grenad::ReaderCursor;
 use hashbrown::hash_map::RawEntryMut;
 use hashbrown::HashMap;
-use raw_collections::bbbul::{BitPacker, BitPacker4x};
-use raw_collections::map::FrozenMap;
-use raw_collections::{Bbbul, FrozenBbbul};
 use roaring::RoaringBitmap;
 use rustc_hash::FxBuildHasher;
 
@@ -177,12 +177,12 @@ impl<'extractor> BalancedCaches<'extractor> {
         Ok(())
     }
 
-    pub fn freeze(&mut self) -> Result<Vec<FrozenCache<'_, 'extractor>>> {
+    pub fn freeze(&mut self, source_id: usize) -> Result<Vec<FrozenCache<'_, 'extractor>>> {
         match &mut self.caches {
             InnerCaches::Normal(NormalCaches { caches }) => caches
                 .iter_mut()
                 .enumerate()
-                .map(|(bucket, map)| {
+                .map(|(bucket_id, map)| {
                     // safety: we are transmuting the Bbbul into a FrozenBbbul
                     //         that are the same size.
                     let map = unsafe {
@@ -201,14 +201,19 @@ impl<'extractor> BalancedCaches<'extractor> {
                             >,
                         >(map)
                     };
-                    Ok(FrozenCache { bucket, cache: FrozenMap::new(map), spilled: Vec::new() })
+                    Ok(FrozenCache {
+                        source_id,
+                        bucket_id,
+                        cache: FrozenMap::new(map),
+                        spilled: Vec::new(),
+                    })
                 })
                 .collect(),
             InnerCaches::Spilling(SpillingCaches { caches, spilled_entries, .. }) => caches
                 .iter_mut()
                 .zip(mem::take(spilled_entries))
                 .enumerate()
-                .map(|(bucket, (map, sorter))| {
+                .map(|(bucket_id, (map, sorter))| {
                     let spilled = sorter
                         .into_reader_cursors()?
                         .into_iter()
@@ -234,7 +239,7 @@ impl<'extractor> BalancedCaches<'extractor> {
                             >,
                         >(map)
                     };
-                    Ok(FrozenCache { bucket, cache: FrozenMap::new(map), spilled })
+                    Ok(FrozenCache { source_id, bucket_id, cache: FrozenMap::new(map), spilled })
                 })
                 .collect(),
         }
@@ -440,7 +445,8 @@ fn spill_entry_to_sorter(
 }
 
 pub struct FrozenCache<'a, 'extractor> {
-    bucket: usize,
+    bucket_id: usize,
+    source_id: usize,
     cache: FrozenMap<
         'a,
         'extractor,
@@ -457,9 +463,9 @@ pub fn transpose_and_freeze_caches<'a, 'extractor>(
     let width = caches.first().map(BalancedCaches::buckets).unwrap_or(0);
     let mut bucket_caches: Vec<_> = iter::repeat_with(Vec::new).take(width).collect();
 
-    for thread_cache in caches {
+    for (thread_index, thread_cache) in caches.iter_mut().enumerate() {
-        for frozen in thread_cache.freeze()? {
+        for frozen in thread_cache.freeze(thread_index)? {
-            bucket_caches[frozen.bucket].push(frozen);
+            bucket_caches[frozen.bucket_id].push(frozen);
         }
     }
 
@@ -477,21 +483,16 @@ where
     F: for<'a> FnMut(&'a [u8], DelAddRoaringBitmap) -> Result<()>,
 {
     let mut maps = Vec::new();
-    let mut readers = Vec::new();
-    let mut current_bucket = None;
-    for FrozenCache { bucket, cache, ref mut spilled } in frozen {
-        assert_eq!(*current_bucket.get_or_insert(bucket), bucket);
-        maps.push(cache);
-        readers.append(spilled);
-    }
-
-    // First manage the spilled entries by looking into the HashMaps,
-    // merge them and mark them as dummy.
     let mut heap = BinaryHeap::new();
-    for (source_index, source) in readers.into_iter().enumerate() {
+    let mut current_bucket = None;
-        let mut cursor = source.into_cursor()?;
+    for FrozenCache { source_id, bucket_id, cache, spilled } in frozen {
-        if cursor.move_on_next()?.is_some() {
+        assert_eq!(*current_bucket.get_or_insert(bucket_id), bucket_id);
-            heap.push(Entry { cursor, source_index });
+        maps.push((source_id, cache));
+        for reader in spilled {
+            let mut cursor = reader.into_cursor()?;
+            if cursor.move_on_next()?.is_some() {
+                heap.push(Entry { cursor, source_id });
+            }
         }
     }
 
@@ -508,25 +509,29 @@ where
 
         let mut output = DelAddRoaringBitmap::from_bytes(first_value)?;
         while let Some(mut entry) = heap.peek_mut() {
-            if let Some((key, _value)) = entry.cursor.current() {
+            if let Some((key, value)) = entry.cursor.current() {
-                if first_key == key {
+                if first_key != key {
-                    let new = DelAddRoaringBitmap::from_bytes(first_value)?;
-                    output = output.merge(new);
-                    // When we are done we the current value of this entry move make
-                    // it move forward and let the heap reorganize itself (on drop)
-                    if entry.cursor.move_on_next()?.is_none() {
-                        PeekMut::pop(entry);
-                    }
-                } else {
                     break;
                 }
+
+                let new = DelAddRoaringBitmap::from_bytes(value)?;
+                output = output.merge(new);
+                // When we are done we the current value of this entry move make
+                // it move forward and let the heap reorganize itself (on drop)
+                if entry.cursor.move_on_next()?.is_none() {
+                    PeekMut::pop(entry);
+                }
             }
         }
 
         // Once we merged all of the spilled bitmaps we must also
         // fetch the entries from the non-spilled entries (the HashMaps).
-        for (map_index, map) in maps.iter_mut().enumerate() {
+        for (source_id, map) in maps.iter_mut() {
-            if first_entry.source_index != map_index {
+            debug_assert!(
+                !(map.get(first_key).is_some() && first_entry.source_id == *source_id),
+                "A thread should not have spiled a key that has been inserted in the cache"
+            );
+            if first_entry.source_id != *source_id {
                 if let Some(new) = map.get_mut(first_key) {
                     output.union_and_clear_bbbul(new);
                 }
@@ -538,12 +543,12 @@ where
 
         // Don't forget to put the first entry back into the heap.
         if first_entry.cursor.move_on_next()?.is_some() {
-            heap.push(first_entry)
+            heap.push(first_entry);
         }
     }
 
     // Then manage the content on the HashMap entries that weren't taken (mem::take).
-    while let Some(mut map) = maps.pop() {
+    while let Some((_, mut map)) = maps.pop() {
         // Make sure we don't try to work with entries already managed by the spilled
         let mut ordered_entries: Vec<_> =
             map.iter_mut().filter(|(_, bbbul)| !bbbul.is_empty()).collect();
@@ -553,7 +558,7 @@ where
             let mut output = DelAddRoaringBitmap::empty();
             output.union_and_clear_bbbul(bbbul);
 
-            for rhs in maps.iter_mut() {
+            for (_, rhs) in maps.iter_mut() {
                 if let Some(new) = rhs.get_mut(key) {
                     output.union_and_clear_bbbul(new);
                 }
@@ -569,14 +574,14 @@ where
 
 struct Entry<R> {
     cursor: ReaderCursor<R>,
-    source_index: usize,
+    source_id: usize,
 }
 
 impl<R> Ord for Entry<R> {
     fn cmp(&self, other: &Entry<R>) -> Ordering {
         let skey = self.cursor.current().map(|(k, _)| k);
         let okey = other.cursor.current().map(|(k, _)| k);
-        skey.cmp(&okey).then(self.source_index.cmp(&other.source_index)).reverse()
+        skey.cmp(&okey).then(self.source_id.cmp(&other.source_id)).reverse()
     }
 }
 

crates/milli/src/update/new/extract/faceted/extract_facets.rs

@@ -16,10 +16,10 @@ use crate::update::del_add::DelAdd;
 use crate::update::new::channel::FieldIdDocidFacetSender;
 use crate::update::new::extract::perm_json_p;
 use crate::update::new::indexer::document_changes::{
-    extract, DocumentChangeContext, DocumentChanges, Extractor, IndexingContext, Progress,
+    extract, DocumentChangeContext, DocumentChanges, Extractor, IndexingContext,
 };
 use crate::update::new::ref_cell_ext::RefCellExt as _;
-use crate::update::new::steps::Step;
+use crate::update::new::steps::IndexingStep;
 use crate::update::new::thread_local::{FullySend, ThreadLocal};
 use crate::update::new::DocumentChange;
 use crate::update::GrenadParameters;
@@ -97,6 +97,15 @@ impl FacetedDocidsExtractor {
                 },
             ),
             DocumentChange::Update(inner) => {
+                if !inner.has_changed_for_fields(
+                    Some(attributes_to_extract),
+                    rtxn,
+                    index,
+                    context.db_fields_ids_map,
+                )? {
+                    return Ok(());
+                }
+
                 extract_document_facets(
                     attributes_to_extract,
                     inner.current(rtxn, index, context.db_fields_ids_map)?,
@@ -364,26 +373,16 @@ fn truncate_str(s: &str) -> &str {
 
 impl FacetedDocidsExtractor {
     #[tracing::instrument(level = "trace", skip_all, target = "indexing::extract::faceted")]
-    pub fn run_extraction<
+    pub fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP>(
-        'pl,
-        'fid,
-        'indexer,
-        'index,
-        'extractor,
-        DC: DocumentChanges<'pl>,
-        MSP,
-        SP,
-    >(
         grenad_parameters: GrenadParameters,
         document_changes: &DC,
-        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP, SP>,
+        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP>,
         extractor_allocs: &'extractor mut ThreadLocal<FullySend<Bump>>,
         sender: &FieldIdDocidFacetSender,
-        step: Step,
+        step: IndexingStep,
     ) -> Result<Vec<BalancedCaches<'extractor>>>
     where
         MSP: Fn() -> bool + Sync,
-        SP: Fn(Progress) + Sync,
     {
         let index = indexing_context.index;
         let rtxn = index.read_txn()?;

crates/milli/src/update/new/extract/mod.rs

@@ -15,23 +15,22 @@ pub use geo::*;
 pub use searchable::*;
 pub use vectors::EmbeddingExtractor;
 
-use super::indexer::document_changes::{DocumentChanges, IndexingContext, Progress};
+use super::indexer::document_changes::{DocumentChanges, IndexingContext};
-use super::steps::Step;
+use super::steps::IndexingStep;
 use super::thread_local::{FullySend, ThreadLocal};
 use crate::update::GrenadParameters;
 use crate::Result;
 
 pub trait DocidsExtractor {
-    fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP, SP>(
+    fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP>(
         grenad_parameters: GrenadParameters,
         document_changes: &DC,
-        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP, SP>,
+        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP>,
         extractor_allocs: &'extractor mut ThreadLocal<FullySend<Bump>>,
-        step: Step,
+        step: IndexingStep,
     ) -> Result<Vec<BalancedCaches<'extractor>>>
     where
-        MSP: Fn() -> bool + Sync,
+        MSP: Fn() -> bool + Sync;
-        SP: Fn(Progress) + Sync;
 }
 
 /// TODO move in permissive json pointer

crates/milli/src/update/new/extract/searchable/extract_word_docids.rs

@@ -11,10 +11,10 @@ use super::tokenize_document::{tokenizer_builder, DocumentTokenizer};
 use crate::update::new::extract::cache::BalancedCaches;
 use crate::update::new::extract::perm_json_p::contained_in;
 use crate::update::new::indexer::document_changes::{
-    extract, DocumentChangeContext, DocumentChanges, Extractor, IndexingContext, Progress,
+    extract, DocumentChangeContext, DocumentChanges, Extractor, IndexingContext,
 };
 use crate::update::new::ref_cell_ext::RefCellExt as _;
-use crate::update::new::steps::Step;
+use crate::update::new::steps::IndexingStep;
 use crate::update::new::thread_local::{FullySend, MostlySend, ThreadLocal};
 use crate::update::new::DocumentChange;
 use crate::update::GrenadParameters;
@@ -28,7 +28,7 @@ pub struct WordDocidsBalancedCaches<'extractor> {
     exact_word_docids: BalancedCaches<'extractor>,
     word_position_docids: BalancedCaches<'extractor>,
     fid_word_count_docids: BalancedCaches<'extractor>,
-    fid_word_count: HashMap<FieldId, (usize, usize)>,
+    fid_word_count: HashMap<FieldId, (Option<usize>, Option<usize>)>,
     current_docid: Option<DocumentId>,
 }
 
@@ -85,8 +85,8 @@ impl<'extractor> WordDocidsBalancedCaches<'extractor> {
 
         self.fid_word_count
             .entry(field_id)
-            .and_modify(|(_current_count, new_count)| *new_count += 1)
+            .and_modify(|(_current_count, new_count)| *new_count.get_or_insert(0) += 1)
-            .or_insert((0, 1));
+            .or_insert((None, Some(1)));
         self.current_docid = Some(docid);
 
         Ok(())
@@ -130,8 +130,8 @@ impl<'extractor> WordDocidsBalancedCaches<'extractor> {
 
         self.fid_word_count
             .entry(field_id)
-            .and_modify(|(current_count, _new_count)| *current_count += 1)
+            .and_modify(|(current_count, _new_count)| *current_count.get_or_insert(0) += 1)
-            .or_insert((1, 0));
+            .or_insert((Some(1), None));
 
         self.current_docid = Some(docid);
 
@@ -141,14 +141,18 @@ impl<'extractor> WordDocidsBalancedCaches<'extractor> {
     fn flush_fid_word_count(&mut self, buffer: &mut BumpVec<u8>) -> Result<()> {
         for (fid, (current_count, new_count)) in self.fid_word_count.drain() {
             if current_count != new_count {
-                if current_count <= MAX_COUNTED_WORDS {
+                if let Some(current_count) =
+                    current_count.filter(|current_count| *current_count <= MAX_COUNTED_WORDS)
+                {
                     buffer.clear();
                     buffer.extend_from_slice(&fid.to_be_bytes());
                     buffer.push(current_count as u8);
                     self.fid_word_count_docids
                         .insert_del_u32(buffer, self.current_docid.unwrap())?;
                 }
-                if new_count <= MAX_COUNTED_WORDS {
+                if let Some(new_count) =
+                    new_count.filter(|new_count| *new_count <= MAX_COUNTED_WORDS)
+                {
                     buffer.clear();
                     buffer.extend_from_slice(&fid.to_be_bytes());
                     buffer.push(new_count as u8);
@@ -235,25 +239,15 @@ impl<'a, 'extractor> Extractor<'extractor> for WordDocidsExtractorData<'a> {
 pub struct WordDocidsExtractors;
 
 impl WordDocidsExtractors {
-    pub fn run_extraction<
+    pub fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP>(
-        'pl,
-        'fid,
-        'indexer,
-        'index,
-        'extractor,
-        DC: DocumentChanges<'pl>,
-        MSP,
-        SP,
-    >(
         grenad_parameters: GrenadParameters,
         document_changes: &DC,
-        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP, SP>,
+        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP>,
         extractor_allocs: &'extractor mut ThreadLocal<FullySend<Bump>>,
-        step: Step,
+        step: IndexingStep,
     ) -> Result<WordDocidsCaches<'extractor>>
     where
         MSP: Fn() -> bool + Sync,
-        SP: Fn(Progress) + Sync,
     {
         let index = indexing_context.index;
         let rtxn = index.read_txn()?;
@@ -351,6 +345,15 @@ impl WordDocidsExtractors {
                 )?;
             }
             DocumentChange::Update(inner) => {
+                if !inner.has_changed_for_fields(
+                    document_tokenizer.attribute_to_extract,
+                    &context.rtxn,
+                    context.index,
+                    context.db_fields_ids_map,
+                )? {
+                    return Ok(());
+                }
+
                 let mut token_fn = |fname: &str, fid, pos, word: &str| {
                     cached_sorter.insert_del_u32(
                         fid,

crates/milli/src/update/new/extract/searchable/extract_word_pair_proximity_docids.rs

@@ -70,6 +70,15 @@ impl SearchableExtractor for WordPairProximityDocidsExtractor {
                 )?;
             }
             DocumentChange::Update(inner) => {
+                if !inner.has_changed_for_fields(
+                    document_tokenizer.attribute_to_extract,
+                    rtxn,
+                    index,
+                    context.db_fields_ids_map,
+                )? {
+                    return Ok(());
+                }
+
                 let document = inner.current(rtxn, index, context.db_fields_ids_map)?;
                 process_document_tokens(
                     document,

crates/milli/src/update/new/extract/searchable/mod.rs

@@ -14,9 +14,9 @@ use tokenize_document::{tokenizer_builder, DocumentTokenizer};
 use super::cache::BalancedCaches;
 use super::DocidsExtractor;
 use crate::update::new::indexer::document_changes::{
-    extract, DocumentChangeContext, DocumentChanges, Extractor, IndexingContext, Progress,
+    extract, DocumentChangeContext, DocumentChanges, Extractor, IndexingContext,
 };
-use crate::update::new::steps::Step;
+use crate::update::new::steps::IndexingStep;
 use crate::update::new::thread_local::{FullySend, ThreadLocal};
 use crate::update::new::DocumentChange;
 use crate::update::GrenadParameters;
@@ -56,16 +56,15 @@ impl<'a, 'extractor, EX: SearchableExtractor + Sync> Extractor<'extractor>
 }
 
 pub trait SearchableExtractor: Sized + Sync {
-    fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP, SP>(
+    fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP>(
         grenad_parameters: GrenadParameters,
         document_changes: &DC,
-        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP, SP>,
+        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP>,
         extractor_allocs: &'extractor mut ThreadLocal<FullySend<Bump>>,
-        step: Step,
+        step: IndexingStep,
     ) -> Result<Vec<BalancedCaches<'extractor>>>
     where
         MSP: Fn() -> bool + Sync,
-        SP: Fn(Progress) + Sync,
     {
         let rtxn = indexing_context.index.read_txn()?;
         let stop_words = indexing_context.index.stop_words(&rtxn)?;
@@ -134,16 +133,15 @@ pub trait SearchableExtractor: Sized + Sync {
 }
 
 impl<T: SearchableExtractor> DocidsExtractor for T {
-    fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP, SP>(
+    fn run_extraction<'pl, 'fid, 'indexer, 'index, 'extractor, DC: DocumentChanges<'pl>, MSP>(
         grenad_parameters: GrenadParameters,
         document_changes: &DC,
-        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP, SP>,
+        indexing_context: IndexingContext<'fid, 'indexer, 'index, MSP>,
         extractor_allocs: &'extractor mut ThreadLocal<FullySend<Bump>>,
-        step: Step,
+        step: IndexingStep,
     ) -> Result<Vec<BalancedCaches<'extractor>>>
     where
         MSP: Fn() -> bool + Sync,
-        SP: Fn(Progress) + Sync,
     {
         Self::run_extraction(
             grenad_parameters,

crates/milli/src/update/new/extract/searchable/tokenize_document.rs

@@ -176,9 +176,10 @@ pub fn tokenizer_builder<'a>(
 #[cfg(test)]
 mod test {
     use bumpalo::Bump;
+    use bumparaw_collections::RawMap;
     use charabia::TokenizerBuilder;
     use meili_snap::snapshot;
-    use raw_collections::RawMap;
+    use rustc_hash::FxBuildHasher;
     use serde_json::json;
     use serde_json::value::RawValue;
 
@@ -234,7 +235,7 @@ mod test {
 
         let bump = Bump::new();
         let document: &RawValue = serde_json::from_str(&document).unwrap();
-        let document = RawMap::from_raw_value(document, &bump).unwrap();
+        let document = RawMap::from_raw_value_and_hasher(document, FxBuildHasher, &bump).unwrap();
 
         let document = Versions::single(document);
         let document = DocumentFromVersions::new(&document);

crates/milli/src/update/new/extract/vectors/mod.rs

@@ -130,6 +130,7 @@ impl<'a, 'b, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a, 'b> {
                                 );
                             } else if new_vectors.regenerate {
                                 let new_rendered = prompt.render_document(
+                                    update.external_document_id(),
                                     update.current(
                                         &context.rtxn,
                                         context.index,
@@ -139,6 +140,7 @@ impl<'a, 'b, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a, 'b> {
                                     &context.doc_alloc,
                                 )?;
                                 let old_rendered = prompt.render_document(
+                                    update.external_document_id(),
                                     update.merged(
                                         &context.rtxn,
                                         context.index,
@@ -158,6 +160,7 @@ impl<'a, 'b, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a, 'b> {
                             }
                         } else if old_vectors.regenerate {
                             let old_rendered = prompt.render_document(
+                                update.external_document_id(),
                                 update.current(
                                     &context.rtxn,
                                     context.index,
@@ -167,6 +170,7 @@ impl<'a, 'b, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a, 'b> {
                                 &context.doc_alloc,
                             )?;
                             let new_rendered = prompt.render_document(
+                                update.external_document_id(),
                                 update.merged(
                                     &context.rtxn,
                                     context.index,
@@ -216,6 +220,7 @@ impl<'a, 'b, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a, 'b> {
                                 );
                             } else if new_vectors.regenerate {
                                 let rendered = prompt.render_document(
+                                    insertion.external_document_id(),
                                     insertion.inserted(),
                                     context.new_fields_ids_map,
                                     &context.doc_alloc,
@@ -229,6 +234,7 @@ impl<'a, 'b, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a, 'b> {
                             }
                         } else {
                             let rendered = prompt.render_document(
+                                insertion.external_document_id(),
                                 insertion.inserted(),
                                 context.new_fields_ids_map,
                                 &context.doc_alloc,

crates/milli/src/update/new/facet_search_builder.rs

@@ -103,6 +103,8 @@ impl<'indexer> FacetSearchBuilder<'indexer> {
 
     #[tracing::instrument(level = "trace", skip_all, target = "indexing::facet_fst")]
     pub fn merge_and_write(self, index: &Index, wtxn: &mut RwTxn, rtxn: &RoTxn) -> Result<()> {
+        tracing::trace!("merge facet strings for facet search: {:?}", self.registered_facets);
+
         let reader = self.normalized_facet_string_docids_sorter.into_reader_cursors()?;
         let mut builder = grenad::MergerBuilder::new(MergeDeladdBtreesetString);
         builder.extend(reader);
@@ -118,12 +120,15 @@ impl<'indexer> FacetSearchBuilder<'indexer> {
                 BEU16StrCodec::bytes_decode(key).map_err(heed::Error::Encoding)?;
 
             if current_field_id != Some(field_id) {
-                if let Some(fst_merger_builder) = fst_merger_builder {
+                if let (Some(current_field_id), Some(fst_merger_builder)) =
+                    (current_field_id, fst_merger_builder)
+                {
                     let mmap = fst_merger_builder.build(&mut callback)?;
-                    index
+                    index.facet_id_string_fst.remap_data_type::<Bytes>().put(
-                        .facet_id_string_fst
+                        wtxn,
-                        .remap_data_type::<Bytes>()
+                        &current_field_id,
-                        .put(wtxn, &field_id, &mmap)?;
+                        &mmap,
+                    )?;
                 }
 
                 fst = index.facet_id_string_fst.get(rtxn, &field_id)?;

crates/milli/src/update/new/indexer/de.rs

@@ -1,6 +1,8 @@
 use std::ops::ControlFlow;
 
 use bumpalo::Bump;
+use bumparaw_collections::RawVec;
+use rustc_hash::FxBuildHasher;
 use serde::de::{DeserializeSeed, Deserializer as _, Visitor};
 use serde_json::value::RawValue;
 
@@ -360,7 +362,7 @@ impl<'a> DeserrRawValue<'a> {
 }
 
 pub struct DeserrRawVec<'a> {
-    vec: raw_collections::RawVec<'a>,
+    vec: RawVec<'a>,
     alloc: &'a Bump,
 }
 
@@ -379,7 +381,7 @@ impl<'a> deserr::Sequence for DeserrRawVec<'a> {
 }
 
 pub struct DeserrRawVecIter<'a> {
-    it: raw_collections::vec::iter::IntoIter<'a>,
+    it: bumparaw_collections::vec::iter::IntoIter<'a>,
     alloc: &'a Bump,
 }
 
@@ -393,7 +395,7 @@ impl<'a> Iterator for DeserrRawVecIter<'a> {
 }
 
 pub struct DeserrRawMap<'a> {
-    map: raw_collections::RawMap<'a>,
+    map: bumparaw_collections::RawMap<'a, FxBuildHasher>,
     alloc: &'a Bump,
 }
 
@@ -416,7 +418,7 @@ impl<'a> deserr::Map for DeserrRawMap<'a> {
 }
 
 pub struct DeserrRawMapIter<'a> {
-    it: raw_collections::map::iter::IntoIter<'a>,
+    it: bumparaw_collections::map::iter::IntoIter<'a>,
     alloc: &'a Bump,
 }
 
@@ -615,7 +617,7 @@ impl<'de> Visitor<'de> for DeserrRawValueVisitor<'de> {
     where
         A: serde::de::SeqAccess<'de>,
     {
-        let mut raw_vec = raw_collections::RawVec::new_in(self.alloc);
+        let mut raw_vec = RawVec::new_in(self.alloc);
         while let Some(next) = seq.next_element()? {
             raw_vec.push(next);
         }

crates/milli/src/update/new/indexer/document_changes.rs

@@ -1,4 +1,5 @@
 use std::cell::{Cell, RefCell};
+use std::sync::atomic::Ordering;
 use std::sync::{Arc, RwLock};
 
 use bumpalo::Bump;
@@ -7,8 +8,9 @@ use rayon::iter::IndexedParallelIterator;
 
 use super::super::document_change::DocumentChange;
 use crate::fields_ids_map::metadata::FieldIdMapWithMetadata;
+use crate::progress::{AtomicDocumentStep, Progress};
 use crate::update::new::parallel_iterator_ext::ParallelIteratorExt as _;
-use crate::update::new::steps::Step;
+use crate::update::new::steps::IndexingStep;
 use crate::update::new::thread_local::{FullySend, MostlySend, ThreadLocal};
 use crate::{FieldsIdsMap, GlobalFieldsIdsMap, Index, InternalError, Result};
 
@@ -133,10 +135,8 @@ pub struct IndexingContext<
     'indexer, // covariant lifetime of objects that are borrowed  during the entire indexing operation
     'index,   // covariant lifetime of the index
     MSP,
-    SP,
 > where
     MSP: Fn() -> bool + Sync,
-    SP: Fn(Progress) + Sync,
 {
     pub index: &'index Index,
     pub db_fields_ids_map: &'indexer FieldsIdsMap,
@@ -144,7 +144,7 @@ pub struct IndexingContext<
     pub doc_allocs: &'indexer ThreadLocal<FullySend<Cell<Bump>>>,
     pub fields_ids_map_store: &'indexer ThreadLocal<FullySend<RefCell<GlobalFieldsIdsMap<'fid>>>>,
     pub must_stop_processing: &'indexer MSP,
-    pub send_progress: &'indexer SP,
+    pub progress: &'indexer Progress,
 }
 
 impl<
@@ -152,18 +152,15 @@ impl<
         'indexer, // covariant lifetime of objects that are borrowed  during the entire indexing operation
         'index,   // covariant lifetime of the index
         MSP,
-        SP,
     > Copy
     for IndexingContext<
         'fid,     // invariant lifetime of fields ids map
         'indexer, // covariant lifetime of objects that are borrowed  during the entire indexing operation
         'index,   // covariant lifetime of the index
         MSP,
-        SP,
     >
 where
     MSP: Fn() -> bool + Sync,
-    SP: Fn(Progress) + Sync,
 {
 }
 
@@ -172,18 +169,15 @@ impl<
         'indexer, // covariant lifetime of objects that are borrowed  during the entire indexing operation
         'index,   // covariant lifetime of the index
         MSP,
-        SP,
     > Clone
     for IndexingContext<
         'fid,     // invariant lifetime of fields ids map
         'indexer, // covariant lifetime of objects that are borrowed  during the entire indexing operation
         'index,   // covariant lifetime of the index
         MSP,
-        SP,
     >
 where
     MSP: Fn() -> bool + Sync,
-    SP: Fn(Progress) + Sync,
 {
     fn clone(&self) -> Self {
         *self
@@ -202,7 +196,6 @@ pub fn extract<
     EX,
     DC: DocumentChanges<'pl>,
     MSP,
-    SP,
 >(
     document_changes: &DC,
     extractor: &EX,
@@ -213,18 +206,18 @@ pub fn extract<
         doc_allocs,
         fields_ids_map_store,
         must_stop_processing,
-        send_progress,
+        progress,
-    }: IndexingContext<'fid, 'indexer, 'index, MSP, SP>,
+    }: IndexingContext<'fid, 'indexer, 'index, MSP>,
     extractor_allocs: &'extractor mut ThreadLocal<FullySend<Bump>>,
     datastore: &'data ThreadLocal<EX::Data>,
-    step: Step,
+    step: IndexingStep,
 ) -> Result<()>
 where
     EX: Extractor<'extractor>,
     MSP: Fn() -> bool + Sync,
-    SP: Fn(Progress) + Sync,
 {
     tracing::trace!("We are resetting the extractor allocators");
+    progress.update_progress(step);
     // Clean up and reuse the extractor allocs
     for extractor_alloc in extractor_allocs.iter_mut() {
         tracing::trace!("\tWith {} bytes reset", extractor_alloc.0.allocated_bytes());
@@ -232,9 +225,11 @@ where
     }
 
     let total_documents = document_changes.len() as u32;
+    let (step, progress_step) = AtomicDocumentStep::new(total_documents);
+    progress.update_progress(progress_step);
 
     let pi = document_changes.iter(CHUNK_SIZE);
-    pi.enumerate().try_arc_for_each_try_init(
+    pi.try_arc_for_each_try_init(
         || {
             DocumentChangeContext::new(
                 index,
@@ -247,13 +242,10 @@ where
                 move |index_alloc| extractor.init_data(index_alloc),
             )
         },
-        |context, (finished_documents, items)| {
+        |context, items| {
             if (must_stop_processing)() {
                 return Err(Arc::new(InternalError::AbortedIndexation.into()));
             }
-            let finished_documents = (finished_documents * CHUNK_SIZE) as u32;
-
-            (send_progress)(Progress::from_step_substep(step, finished_documents, total_documents));
 
             // Clean up and reuse the document-specific allocator
             context.doc_alloc.reset();
@@ -264,6 +256,7 @@ where
             });
 
             let res = extractor.process(changes, context).map_err(Arc::new);
+            step.fetch_add(items.as_ref().len() as u32, Ordering::Relaxed);
 
             // send back the doc_alloc in the pool
             context.doc_allocs.get_or_default().0.set(std::mem::take(&mut context.doc_alloc));
@@ -271,32 +264,7 @@ where
             res
         },
     )?;
-
+    step.store(total_documents, Ordering::Relaxed);
-    (send_progress)(Progress::from_step_substep(step, total_documents, total_documents));
 
     Ok(())
 }
-
-pub struct Progress {
-    pub finished_steps: u16,
-    pub total_steps: u16,
-    pub step_name: &'static str,
-    pub finished_total_substep: Option<(u32, u32)>,
-}
-
-impl Progress {
-    pub fn from_step(step: Step) -> Self {
-        Self {
-            finished_steps: step.finished_steps(),
-            total_steps: Step::total_steps(),
-            step_name: step.name(),
-            finished_total_substep: None,
-        }
-    }
-    pub fn from_step_substep(step: Step, finished_substep: u32, total_substep: u32) -> Self {
-        Self {
-            finished_total_substep: Some((finished_substep, total_substep)),
-            ..Progress::from_step(step)
-        }
-    }
-}

crates/milli/src/update/new/indexer/document_deletion.rs

@@ -92,11 +92,12 @@ mod test {
 
     use crate::fields_ids_map::metadata::{FieldIdMapWithMetadata, MetadataBuilder};
     use crate::index::tests::TempIndex;
+    use crate::progress::Progress;
     use crate::update::new::indexer::document_changes::{
         extract, DocumentChangeContext, Extractor, IndexingContext,
     };
     use crate::update::new::indexer::DocumentDeletion;
-    use crate::update::new::steps::Step;
+    use crate::update::new::steps::IndexingStep;
     use crate::update::new::thread_local::{MostlySend, ThreadLocal};
     use crate::update::new::DocumentChange;
     use crate::DocumentId;
@@ -164,7 +165,7 @@ mod test {
             doc_allocs: &doc_allocs,
             fields_ids_map_store: &fields_ids_map_store,
             must_stop_processing: &(|| false),
-            send_progress: &(|_progress| {}),
+            progress: &Progress::default(),
         };
 
         for _ in 0..3 {
@@ -176,7 +177,7 @@ mod test {
                 context,
                 &mut extractor_allocs,
                 &datastore,
-                Step::ExtractingDocuments,
+                IndexingStep::ExtractingDocuments,
             )
             .unwrap();