First version with hannoy

Cargo.lock

@@ -442,28 +442,6 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
-[[package]]
-name = "arroy"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08e6111f351d004bd13e95ab540721272136fd3218b39d3ec95a2ea1c4e6a0a6"
-dependencies = [
- "bytemuck",
- "byteorder",
- "enum-iterator",
- "heed",
- "memmap2",
- "nohash",
- "ordered-float 4.6.0",
- "page_size",
- "rand 0.8.5",
- "rayon",
- "roaring",
- "tempfile",
- "thiserror 2.0.12",
- "tracing",
-]
-
 [[package]]
 name = "assert-json-diff"
 version = "2.0.2"
@@ -2600,6 +2578,32 @@ dependencies = [
  "rand_distr",
 ]
 
+[[package]]
+name = "hannoy"
+version = "0.7.0"
+source = "git+https://github.com/nnethercott/hannoy?branch=incremental-indexing#364f611b10642ad34a3466b80dc687d1114bda4f"
+dependencies = [
+ "bytemuck",
+ "byteorder",
+ "enum-iterator",
+ "hashbrown 0.15.4",
+ "heed",
+ "memmap2",
+ "min-max-heap",
+ "nohash",
+ "ordered-float 5.0.0",
+ "page_size",
+ "papaya",
+ "rand 0.8.5",
+ "rayon",
+ "roaring",
+ "slice-group-by",
+ "tempfile",
+ "thiserror 2.0.12",
+ "tinyvec",
+ "tracing",
+]
+
 [[package]]
 name = "hash32"
 version = "0.3.1"
@@ -3921,7 +3925,6 @@ name = "milli"
 version = "1.16.0"
 dependencies = [
  "allocator-api2 0.3.0",
- "arroy",
  "bbqueue",
  "big_s",
  "bimap",
@@ -3949,6 +3952,7 @@ dependencies = [
  "fxhash",
  "geoutils",
  "grenad",
+ "hannoy",
  "hashbrown 0.15.4",
  "heed",
  "hf-hub",
@@ -4018,6 +4022,12 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "min-max-heap"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2687e6cf9c00f48e9284cf9fd15f2ef341d03cc7743abf9df4c5f07fdee50b18"
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -4358,15 +4368,6 @@ dependencies = [
  "num-traits",
 ]
 
-[[package]]
-name = "ordered-float"
-version = "4.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7bb71e1b3fa6ca1c61f383464aaf2bb0e2f8e772a1f01d486832464de363b951"
-dependencies = [
- "num-traits",
-]
-
 [[package]]
 name = "ordered-float"
 version = "5.0.0"
@@ -4398,6 +4399,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "papaya"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f92dd0b07c53a0a0c764db2ace8c541dc47320dad97c2200c2a637ab9dd2328f"
+dependencies = [
+ "equivalent",
+ "seize",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.4"
@@ -5449,6 +5460,16 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "seize"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4b8d813387d566f627f3ea1b914c068aac94c40ae27ec43f5f33bde65abefe7"
+dependencies = [
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "semver"
 version = "1.0.26"

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

@@ -143,10 +143,10 @@ impl IndexStats {
     ///
     /// - rtxn: a RO transaction for the index, obtained from `Index::read_txn()`.
     pub fn new(index: &Index, rtxn: &RoTxn) -> milli::Result<Self> {
-        let arroy_stats = index.arroy_stats(rtxn)?;
+        let hannoy_stats = index.hannoy_stats(rtxn)?;
         Ok(IndexStats {
-            number_of_embeddings: Some(arroy_stats.number_of_embeddings),
+            number_of_embeddings: Some(hannoy_stats.number_of_embeddings),
-            number_of_embedded_documents: Some(arroy_stats.documents.len()),
+            number_of_embedded_documents: Some(hannoy_stats.documents.len()),
             documents_database_stats: index.documents_stats(rtxn)?.unwrap_or_default(),
             number_of_documents: None,
             database_size: index.on_disk_size()?,

crates/meilisearch/tests/vector/binary_quantized.rs

@@ -320,7 +320,7 @@ async fn binary_quantize_clear_documents() {
     }
     "###);
 
-    // Make sure the arroy DB has been cleared
+    // Make sure the hannoy DB has been cleared
     let (documents, _code) =
         index.search_post(json!({ "hybrid": { "embedder": "manual" }, "vector": [1, 1, 1] })).await;
     snapshot!(documents, @r###"

crates/meilisearch/tests/vector/mod.rs

@@ -682,7 +682,7 @@ async fn clear_documents() {
     }
     "###);
 
-    // Make sure the arroy DB has been cleared
+    // Make sure the hannoy DB has been cleared
     let (documents, _code) =
         index.search_post(json!({ "vector": [1, 1, 1], "hybrid": {"embedder": "manual"} })).await;
     snapshot!(documents, @r###"

crates/meilisearch/tests/vector/settings.rs

@@ -243,7 +243,7 @@ async fn reset_embedder_documents() {
     }
     "###);
 
-    // Make sure the arroy DB has been cleared
+    // Make sure the hannoy DB has been cleared
     let (documents, _code) =
         index.search_post(json!({ "vector": [1, 1, 1], "hybrid": {"embedder": "default"} })).await;
     snapshot!(json_string!(documents), @r###"

crates/meilitool/src/main.rs

@@ -141,8 +141,8 @@ enum Command {
 
 #[derive(Clone, ValueEnum)]
 enum IndexPart {
-    /// Will make the arroy index hot.
+    /// Will make the hannoy index hot.
-    Arroy,
+    Hannoy,
 }
 
 fn main() -> anyhow::Result<()> {
@@ -648,12 +648,12 @@ fn hair_dryer(
             let rtxn = index.read_txn()?;
             for part in index_parts {
                 match part {
-                    IndexPart::Arroy => {
+                    IndexPart::Hannoy => {
                         let mut count = 0;
-                        let total = index.vector_arroy.len(&rtxn)?;
+                        let total = index.vector_hannoy.len(&rtxn)?;
-                        eprintln!("Hair drying arroy for {uid}...");
+                        eprintln!("Hair drying hannoy for {uid}...");
                         for (i, result) in index
-                            .vector_arroy
+                            .vector_hannoy
                             .remap_types::<Bytes, Bytes>()
                             .iter(&rtxn)?
                             .enumerate()

crates/meilitool/src/upgrade/v1_11.rs

@@ -68,7 +68,7 @@ pub fn v1_10_to_v1_11(
             )
         })?;
         let index_read_database =
-            try_opening_poly_database(&index_env, &index_rtxn, db_name::VECTOR_ARROY)
+            try_opening_poly_database(&index_env, &index_rtxn, db_name::VECTOR_HANNOY)
                 .with_context(|| format!("while updating date format for index `{uid}`"))?;
 
         let mut index_wtxn = index_env.write_txn().with_context(|| {
@@ -79,15 +79,16 @@ pub fn v1_10_to_v1_11(
         })?;
 
         let index_write_database =
-            try_opening_poly_database(&index_env, &index_wtxn, db_name::VECTOR_ARROY)
+            try_opening_poly_database(&index_env, &index_wtxn, db_name::VECTOR_HANNOY)
                 .with_context(|| format!("while updating date format for index `{uid}`"))?;
 
-        meilisearch_types::milli::arroy::upgrade::cosine_from_0_4_to_0_5(
+        // meilisearch_types::milli::hannoy::upgrade::cosine_from_0_4_to_0_5(
-            &index_rtxn,
+        //     &index_rtxn,
-            index_read_database.remap_types(),
+        //     index_read_database.remap_types(),
-            &mut index_wtxn,
+        //     &mut index_wtxn,
-            index_write_database.remap_types(),
+        //     index_write_database.remap_types(),
-        )?;
+        // )?;
+        unimplemented!("Hannoy doesn't support upgrading");
 
         index_wtxn.commit()?;
     }

crates/milli/Cargo.toml

@@ -87,7 +87,7 @@ rhai = { version = "1.22.2", features = [
     "no_time",
     "sync",
 ] }
-arroy = "0.6.1"
+hannoy = { git = "https://github.com/nnethercott/hannoy", branch = "incremental-indexing" }
 rand = "0.8.5"
 tracing = "0.1.41"
 ureq = { version = "2.12.1", features = ["json"] }

crates/milli/src/error.rs

@@ -76,7 +76,7 @@ pub enum InternalError {
     #[error("Cannot upgrade to the following version: v{0}.{1}.{2}.")]
     CannotUpgradeToVersion(u32, u32, u32),
     #[error(transparent)]
-    ArroyError(#[from] arroy::Error),
+    HannoyError(#[from] hannoy::Error),
     #[error(transparent)]
     VectorEmbeddingError(#[from] crate::vector::Error),
 }
@@ -405,23 +405,24 @@ impl From<crate::vector::Error> for Error {
     }
 }
 
-impl From<arroy::Error> for Error {
+impl From<hannoy::Error> for Error {
-    fn from(value: arroy::Error) -> Self {
+    fn from(value: hannoy::Error) -> Self {
         match value {
-            arroy::Error::Heed(heed) => heed.into(),
+            hannoy::Error::Heed(heed) => heed.into(),
-            arroy::Error::Io(io) => io.into(),
+            hannoy::Error::Io(io) => io.into(),
-            arroy::Error::InvalidVecDimension { expected, received } => {
+            hannoy::Error::InvalidVecDimension { expected, received } => {
                 Error::UserError(UserError::InvalidVectorDimensions { expected, found: received })
             }
-            arroy::Error::BuildCancelled => Error::InternalError(InternalError::AbortedIndexation),
+            hannoy::Error::BuildCancelled => Error::InternalError(InternalError::AbortedIndexation),
-            arroy::Error::DatabaseFull
+            hannoy::Error::DatabaseFull
-            | arroy::Error::InvalidItemAppend
+            | hannoy::Error::InvalidItemAppend
-            | arroy::Error::UnmatchingDistance { .. }
+            | hannoy::Error::UnmatchingDistance { .. }
-            | arroy::Error::NeedBuild(_)
+            | hannoy::Error::NeedBuild(_)
-            | arroy::Error::MissingKey { .. }
+            | hannoy::Error::MissingKey { .. }
-            | arroy::Error::MissingMetadata(_)
+            | hannoy::Error::MissingMetadata(_)
-            | arroy::Error::CannotDecodeKeyMode { .. } => {
+            | hannoy::Error::UnknownVersion { .. }
-                Error::InternalError(InternalError::ArroyError(value))
+            | hannoy::Error::CannotDecodeKeyMode { .. } => {
+                Error::InternalError(InternalError::HannoyError(value))
             }
         }
     }

crates/milli/src/index.rs

@@ -31,7 +31,7 @@ use crate::prompt::PromptData;
 use crate::proximity::ProximityPrecision;
 use crate::update::new::StdResult;
 use crate::vector::db::IndexEmbeddingConfigs;
-use crate::vector::{ArroyStats, ArroyWrapper, Embedding};
+use crate::vector::{Embedding, HannoyStats, HannoyWrapper};
 use crate::{
     default_criteria, CboRoaringBitmapCodec, Criterion, DocumentId, ExternalDocumentsIds,
     FacetDistribution, FieldDistribution, FieldId, FieldIdMapMissingEntry, FieldIdWordCountCodec,
@@ -113,7 +113,7 @@ pub mod db_name {
     pub const FIELD_ID_DOCID_FACET_F64S: &str = "field-id-docid-facet-f64s";
     pub const FIELD_ID_DOCID_FACET_STRINGS: &str = "field-id-docid-facet-strings";
     pub const VECTOR_EMBEDDER_CATEGORY_ID: &str = "vector-embedder-category-id";
-    pub const VECTOR_ARROY: &str = "vector-arroy";
+    pub const VECTOR_HANNOY: &str = "vector-hannoy";
     pub const DOCUMENTS: &str = "documents";
 }
 const NUMBER_OF_DBS: u32 = 25;
@@ -177,10 +177,10 @@ pub struct Index {
     /// Maps the document id, the facet field id and the strings.
     pub field_id_docid_facet_strings: Database<FieldDocIdFacetStringCodec, Str>,
 
-    /// Maps an embedder name to its id in the arroy store.
+    /// Maps an embedder name to its id in the hannoy store.
     pub(crate) embedder_category_id: Database<Unspecified, Unspecified>,
-    /// Vector store based on arroy™.
+    /// Vector store based on hannoy™.
-    pub vector_arroy: arroy::Database<Unspecified>,
+    pub vector_hannoy: hannoy::Database<Unspecified>,
 
     /// Maps the document id to the document as an obkv store.
     pub(crate) documents: Database<BEU32, ObkvCodec>,
@@ -237,7 +237,7 @@ impl Index {
         // vector stuff
         let embedder_category_id =
             env.create_database(&mut wtxn, Some(VECTOR_EMBEDDER_CATEGORY_ID))?;
-        let vector_arroy = env.create_database(&mut wtxn, Some(VECTOR_ARROY))?;
+        let vector_hannoy = env.create_database(&mut wtxn, Some(VECTOR_HANNOY))?;
 
         let documents = env.create_database(&mut wtxn, Some(DOCUMENTS))?;
 
@@ -264,7 +264,7 @@ impl Index {
             facet_id_is_empty_docids,
             field_id_docid_facet_f64s,
             field_id_docid_facet_strings,
-            vector_arroy,
+            vector_hannoy,
             embedder_category_id,
             documents,
         };
@@ -1771,8 +1771,8 @@ impl Index {
         let embedders = self.embedding_configs();
         for config in embedders.embedding_configs(rtxn)? {
             let embedder_info = embedders.embedder_info(rtxn, &config.name)?.unwrap();
-            let reader = ArroyWrapper::new(
+            let reader = HannoyWrapper::new(
-                self.vector_arroy,
+                self.vector_hannoy,
                 embedder_info.embedder_id,
                 config.config.quantized(),
             );
@@ -1790,13 +1790,13 @@ impl Index {
         Ok(PrefixSettings { compute_prefixes, max_prefix_length: 4, prefix_count_threshold: 100 })
     }
 
-    pub fn arroy_stats(&self, rtxn: &RoTxn<'_>) -> Result<ArroyStats> {
+    pub fn hannoy_stats(&self, rtxn: &RoTxn<'_>) -> Result<HannoyStats> {
-        let mut stats = ArroyStats::default();
+        let mut stats = HannoyStats::default();
         let embedding_configs = self.embedding_configs();
         for config in embedding_configs.embedding_configs(rtxn)? {
             let embedder_id = embedding_configs.embedder_id(rtxn, &config.name)?.unwrap();
             let reader =
-                ArroyWrapper::new(self.vector_arroy, embedder_id, config.config.quantized());
+                HannoyWrapper::new(self.vector_hannoy, embedder_id, config.config.quantized());
             reader.aggregate_stats(rtxn, &mut stats)?;
         }
         Ok(stats)
@@ -1840,7 +1840,7 @@ impl Index {
             facet_id_is_empty_docids,
             field_id_docid_facet_f64s,
             field_id_docid_facet_strings,
-            vector_arroy,
+            vector_hannoy,
             embedder_category_id,
             documents,
         } = self;
@@ -1911,7 +1911,7 @@ impl Index {
             "field_id_docid_facet_strings",
             field_id_docid_facet_strings.stat(rtxn).map(compute_size)?,
         );
-        sizes.insert("vector_arroy", vector_arroy.stat(rtxn).map(compute_size)?);
+        sizes.insert("vector_hannoy", vector_hannoy.stat(rtxn).map(compute_size)?);
         sizes.insert("embedder_category_id", embedder_category_id.stat(rtxn).map(compute_size)?);
         sizes.insert("documents", documents.stat(rtxn).map(compute_size)?);
 

crates/milli/src/lib.rs

@@ -52,7 +52,7 @@ pub use search::new::{
 };
 use serde_json::Value;
 pub use thread_pool_no_abort::{PanicCatched, ThreadPoolNoAbort, ThreadPoolNoAbortBuilder};
-pub use {arroy, charabia as tokenizer, heed, rhai};
+pub use {charabia as tokenizer, hannoy, heed, rhai};
 
 pub use self::asc_desc::{AscDesc, AscDescError, Member, SortError};
 pub use self::attribute_patterns::{AttributePatterns, PatternMatch};

crates/milli/src/progress.rs

@@ -98,12 +98,12 @@ impl Progress {
     }
 
     // TODO: ideally we should expose the progress in a way that let arroy use it directly
-    pub(crate) fn update_progress_from_arroy(&self, progress: arroy::WriterProgress) {
+    // pub(crate) fn update_progress_from_hannoy(&self, progress: hannoy::WriterProgress) {
-        self.update_progress(progress.main);
+    //     self.update_progress(progress.main);
-        if let Some(sub) = progress.sub {
+    //     if let Some(sub) = progress.sub {
-            self.update_progress(sub);
+    //         self.update_progress(sub);
-        }
+    //     }
-    }
+    // }
 }
 
 /// Generate the names associated with the durations and push them.
@@ -277,43 +277,43 @@ impl<U: Send + Sync + 'static> Step for VariableNameStep<U> {
     }
 }
 
-impl Step for arroy::MainStep {
+// impl Step for hannoy::MainStep {
-    fn name(&self) -> Cow<'static, str> {
+//     fn name(&self) -> Cow<'static, str> {
-        match self {
+//         match self {
-            arroy::MainStep::PreProcessingTheItems => "pre processing the items",
+//             hannoy::MainStep::PreProcessingTheItems => "pre processing the items",
-            arroy::MainStep::WritingTheDescendantsAndMetadata => {
+//             hannoy::MainStep::WritingTheDescendantsAndMetadata => {
-                "writing the descendants and metadata"
+//                 "writing the descendants and metadata"
-            }
+//             }
-            arroy::MainStep::RetrieveTheUpdatedItems => "retrieve the updated items",
+//             hannoy::MainStep::RetrieveTheUpdatedItems => "retrieve the updated items",
-            arroy::MainStep::RetrievingTheTreeAndItemNodes => "retrieving the tree and item nodes",
+//             hannoy::MainStep::RetrievingTheTreeAndItemNodes => "retrieving the tree and item nodes",
-            arroy::MainStep::UpdatingTheTrees => "updating the trees",
+//             hannoy::MainStep::UpdatingTheTrees => "updating the trees",
-            arroy::MainStep::CreateNewTrees => "create new trees",
+//             hannoy::MainStep::CreateNewTrees => "create new trees",
-            arroy::MainStep::WritingNodesToDatabase => "writing nodes to database",
+//             hannoy::MainStep::WritingNodesToDatabase => "writing nodes to database",
-            arroy::MainStep::DeleteExtraneousTrees => "delete extraneous trees",
+//             hannoy::MainStep::DeleteExtraneousTrees => "delete extraneous trees",
-            arroy::MainStep::WriteTheMetadata => "write the metadata",
+//             hannoy::MainStep::WriteTheMetadata => "write the metadata",
-        }
+//         }
-        .into()
+//         .into()
-    }
+//     }
 
-    fn current(&self) -> u32 {
+//     fn current(&self) -> u32 {
-        *self as u32
+//         *self as u32
-    }
+//     }
 
-    fn total(&self) -> u32 {
+//     fn total(&self) -> u32 {
-        Self::CARDINALITY as u32
+//         Self::CARDINALITY as u32
-    }
+//     }
-}
+// }
 
-impl Step for arroy::SubStep {
+// impl Step for hannoy::SubStep {
-    fn name(&self) -> Cow<'static, str> {
+//     fn name(&self) -> Cow<'static, str> {
-        self.unit.into()
+//         self.unit.into()
-    }
+//     }
 
-    fn current(&self) -> u32 {
+//     fn current(&self) -> u32 {
-        self.current.load(Ordering::Relaxed)
+//         self.current.load(Ordering::Relaxed)
-    }
+//     }
 
-    fn total(&self) -> u32 {
+//     fn total(&self) -> u32 {
-        self.max
+//         self.max
-    }
+//     }
-}
+// }

crates/milli/src/search/new/vector_sort.rs

@@ -6,7 +6,7 @@ use roaring::RoaringBitmap;
 use super::ranking_rules::{RankingRule, RankingRuleOutput, RankingRuleQueryTrait};
 use super::VectorStoreStats;
 use crate::score_details::{self, ScoreDetails};
-use crate::vector::{ArroyWrapper, DistributionShift, Embedder};
+use crate::vector::{DistributionShift, Embedder, HannoyWrapper};
 use crate::{DocumentId, Result, SearchContext, SearchLogger};
 
 pub struct VectorSort<Q: RankingRuleQueryTrait> {
@@ -56,7 +56,8 @@ impl<Q: RankingRuleQueryTrait> VectorSort<Q> {
         let target = &self.target;
 
         let before = Instant::now();
-        let reader = ArroyWrapper::new(ctx.index.vector_arroy, self.embedder_index, self.quantized);
+        let reader =
+            HannoyWrapper::new(ctx.index.vector_hannoy, self.embedder_index, self.quantized);
         let results = reader.nns_by_vector(ctx.txn, target, self.limit, Some(vector_candidates))?;
         self.cached_sorted_docids = results.into_iter();
         *ctx.vector_store_stats.get_or_insert_default() += VectorStoreStats {

crates/milli/src/search/similar.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use roaring::RoaringBitmap;
 
 use crate::score_details::{self, ScoreDetails};
-use crate::vector::{ArroyWrapper, Embedder};
+use crate::vector::{Embedder, HannoyWrapper};
 use crate::{filtered_universe, DocumentId, Filter, Index, Result, SearchResult};
 
 pub struct Similar<'a> {
@@ -72,7 +72,7 @@ impl<'a> Similar<'a> {
                 crate::UserError::InvalidSimilarEmbedder(self.embedder_name.to_owned())
             })?;
 
-        let reader = ArroyWrapper::new(self.index.vector_arroy, embedder_index, self.quantized);
+        let reader = HannoyWrapper::new(self.index.vector_hannoy, embedder_index, self.quantized);
         let results = reader.nns_by_item(
             self.rtxn,
             self.id,

crates/milli/src/update/clear_documents.rs

@@ -45,7 +45,7 @@ impl<'t, 'i> ClearDocuments<'t, 'i> {
             facet_id_is_empty_docids,
             field_id_docid_facet_f64s,
             field_id_docid_facet_strings,
-            vector_arroy,
+            vector_hannoy,
             embedder_category_id: _,
             documents,
         } = self.index;
@@ -88,7 +88,7 @@ impl<'t, 'i> ClearDocuments<'t, 'i> {
         field_id_docid_facet_f64s.clear(self.wtxn)?;
         field_id_docid_facet_strings.clear(self.wtxn)?;
         // vector
-        vector_arroy.clear(self.wtxn)?;
+        vector_hannoy.clear(self.wtxn)?;
 
         documents.clear(self.wtxn)?;
 

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

@@ -39,7 +39,7 @@ use crate::update::{
     IndexerConfig, UpdateIndexingStep, WordPrefixDocids, WordPrefixIntegerDocids, WordsPrefixesFst,
 };
 use crate::vector::db::EmbedderInfo;
-use crate::vector::{ArroyWrapper, RuntimeEmbedders};
+use crate::vector::{HannoyWrapper, RuntimeEmbedders};
 use crate::{CboRoaringBitmapCodec, Index, Result, UserError};
 
 static MERGED_DATABASE_COUNT: usize = 7;
@@ -494,7 +494,7 @@ where
                     },
                 )?;
                 let reader =
-                    ArroyWrapper::new(self.index.vector_arroy, index, action.was_quantized);
+                    HannoyWrapper::new(self.index.vector_hannoy, index, action.was_quantized);
                 let Some(dim) = reader.dimensions(self.wtxn)? else {
                     continue;
                 };
@@ -504,7 +504,7 @@ where
 
         for (embedder_name, dimension) in dimension {
             let wtxn = &mut *self.wtxn;
-            let vector_arroy = self.index.vector_arroy;
+            let vector_hannoy = self.index.vector_hannoy;
             let cancel = &self.should_abort;
 
             let embedder_index =
@@ -523,7 +523,7 @@ where
             let is_quantizing = embedder_config.is_some_and(|action| action.is_being_quantized);
 
             pool.install(|| {
-                let mut writer = ArroyWrapper::new(vector_arroy, embedder_index, was_quantized);
+                let mut writer = HannoyWrapper::new(vector_hannoy, embedder_index, was_quantized);
                 writer.build_and_quantize(
                     wtxn,
                     // In the settings we don't have any progress to share

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

@@ -32,7 +32,7 @@ use crate::update::settings::{InnerIndexSettings, InnerIndexSettingsDiff};
 use crate::update::{AvailableIds, UpdateIndexingStep};
 use crate::vector::parsed_vectors::{ExplicitVectors, VectorOrArrayOfVectors};
 use crate::vector::settings::{RemoveFragments, WriteBackToDocuments};
-use crate::vector::ArroyWrapper;
+use crate::vector::HannoyWrapper;
 use crate::{FieldDistribution, FieldId, FieldIdMapMissingEntry, Index, Result};
 
 pub struct TransformOutput {
@@ -834,15 +834,15 @@ impl<'a, 'i> Transform<'a, 'i> {
             None
         };
 
-        let readers: BTreeMap<&str, (ArroyWrapper, &RoaringBitmap)> = settings_diff
+        let readers: BTreeMap<&str, (HannoyWrapper, &RoaringBitmap)> = settings_diff
             .embedding_config_updates
             .iter()
             .filter_map(|(name, action)| {
                 if let Some(WriteBackToDocuments { embedder_id, user_provided }) =
                     action.write_back()
                 {
-                    let reader = ArroyWrapper::new(
+                    let reader = HannoyWrapper::new(
-                        self.index.vector_arroy,
+                        self.index.vector_hannoy,
                         *embedder_id,
                         action.was_quantized,
                     );
@@ -884,7 +884,7 @@ impl<'a, 'i> Transform<'a, 'i> {
 
                 let injected_vectors: std::result::Result<
                     serde_json::Map<String, serde_json::Value>,
-                    arroy::Error,
+                    hannoy::Error,
                 > = readers
                     .iter()
                     .filter_map(|(name, (reader, user_provided))| {
@@ -949,9 +949,9 @@ impl<'a, 'i> Transform<'a, 'i> {
             else {
                 continue;
             };
-            let arroy =
+            let hannoy =
-                ArroyWrapper::new(self.index.vector_arroy, infos.embedder_id, was_quantized);
+                HannoyWrapper::new(self.index.vector_hannoy, infos.embedder_id, was_quantized);
-            let Some(dimensions) = arroy.dimensions(wtxn)? else {
+            let Some(dimensions) = hannoy.dimensions(wtxn)? else {
                 continue;
             };
             for fragment_id in fragment_ids {
@@ -959,17 +959,17 @@ impl<'a, 'i> Transform<'a, 'i> {
 
                 if infos.embedding_status.user_provided_docids().is_empty() {
                     // no user provided: clear store
-                    arroy.clear_store(wtxn, *fragment_id, dimensions)?;
+                    hannoy.clear_store(wtxn, *fragment_id, dimensions)?;
                     continue;
                 }
 
                 // some user provided, remove only the ids that are not user provided
-                let to_delete = arroy.items_in_store(wtxn, *fragment_id, |items| {
+                let to_delete = hannoy.items_in_store(wtxn, *fragment_id, |items| {
                     items - infos.embedding_status.user_provided_docids()
                 })?;
 
                 for to_delete in to_delete {
-                    arroy.del_item_in_store(wtxn, to_delete, *fragment_id, dimensions)?;
+                    hannoy.del_item_in_store(wtxn, to_delete, *fragment_id, dimensions)?;
                 }
             }
         }

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

@@ -27,7 +27,7 @@ use crate::update::index_documents::helpers::{
 };
 use crate::update::settings::InnerIndexSettingsDiff;
 use crate::vector::db::{EmbeddingStatusDelta, IndexEmbeddingConfig};
-use crate::vector::ArroyWrapper;
+use crate::vector::HannoyWrapper;
 use crate::{
     lat_lng_to_xyz, CboRoaringBitmapCodec, DocumentId, FieldId, GeoPoint, Index, InternalError,
     Result, SerializationError, U8StrStrCodec,
@@ -677,7 +677,8 @@ pub(crate) fn write_typed_chunk_into_index(
                 .get(&embedder_name)
                 .is_some_and(|conf| conf.is_quantized);
             // FIXME: allow customizing distance
-            let writer = ArroyWrapper::new(index.vector_arroy, infos.embedder_id, binary_quantized);
+            let writer =
+                HannoyWrapper::new(index.vector_hannoy, infos.embedder_id, binary_quantized);
 
             // remove vectors for docids we want them removed
             let merger = remove_vectors_builder.build();

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

@@ -255,9 +255,9 @@ impl<'a> From<FrameGrantR<'a>> for FrameWithHeader<'a> {
 #[repr(u8)]
 pub enum EntryHeader {
     DbOperation(DbOperation),
-    ArroyDeleteVector(ArroyDeleteVector),
+    HannoyDeleteVector(HannoyDeleteVector),
-    ArroySetVectors(ArroySetVectors),
+    HannoySetVectors(HannoySetVectors),
-    ArroySetVector(ArroySetVector),
+    HannoySetVector(HannoySetVector),
 }
 
 impl EntryHeader {
@@ -268,9 +268,9 @@ impl EntryHeader {
     const fn variant_id(&self) -> u8 {
         match self {
             EntryHeader::DbOperation(_) => 0,
-            EntryHeader::ArroyDeleteVector(_) => 1,
+            EntryHeader::HannoyDeleteVector(_) => 1,
-            EntryHeader::ArroySetVectors(_) => 2,
+            EntryHeader::HannoySetVectors(_) => 2,
-            EntryHeader::ArroySetVector(_) => 3,
+            EntryHeader::HannoySetVector(_) => 3,
         }
     }
 
@@ -286,26 +286,26 @@ impl EntryHeader {
     }
 
     const fn total_delete_vector_size() -> usize {
-        Self::variant_size() + mem::size_of::<ArroyDeleteVector>()
+        Self::variant_size() + mem::size_of::<HannoyDeleteVector>()
     }
 
     /// The `dimensions` corresponds to the number of `f32` in the embedding.
     fn total_set_vectors_size(count: usize, dimensions: usize) -> usize {
         let embedding_size = dimensions * mem::size_of::<f32>();
-        Self::variant_size() + mem::size_of::<ArroySetVectors>() + embedding_size * count
+        Self::variant_size() + mem::size_of::<HannoySetVectors>() + embedding_size * count
     }
 
     fn total_set_vector_size(dimensions: usize) -> usize {
         let embedding_size = dimensions * mem::size_of::<f32>();
-        Self::variant_size() + mem::size_of::<ArroySetVector>() + embedding_size
+        Self::variant_size() + mem::size_of::<HannoySetVector>() + embedding_size
     }
 
     fn header_size(&self) -> usize {
         let payload_size = match self {
             EntryHeader::DbOperation(op) => mem::size_of_val(op),
-            EntryHeader::ArroyDeleteVector(adv) => mem::size_of_val(adv),
+            EntryHeader::HannoyDeleteVector(adv) => mem::size_of_val(adv),
-            EntryHeader::ArroySetVectors(asvs) => mem::size_of_val(asvs),
+            EntryHeader::HannoySetVectors(asvs) => mem::size_of_val(asvs),
-            EntryHeader::ArroySetVector(asv) => mem::size_of_val(asv),
+            EntryHeader::HannoySetVector(asv) => mem::size_of_val(asv),
         };
         Self::variant_size() + payload_size
     }
@@ -319,19 +319,19 @@ impl EntryHeader {
                 EntryHeader::DbOperation(header)
             }
             1 => {
-                let header_bytes = &remaining[..mem::size_of::<ArroyDeleteVector>()];
+                let header_bytes = &remaining[..mem::size_of::<HannoyDeleteVector>()];
                 let header = checked::pod_read_unaligned(header_bytes);
-                EntryHeader::ArroyDeleteVector(header)
+                EntryHeader::HannoyDeleteVector(header)
             }
             2 => {
-                let header_bytes = &remaining[..mem::size_of::<ArroySetVectors>()];
+                let header_bytes = &remaining[..mem::size_of::<HannoySetVectors>()];
                 let header = checked::pod_read_unaligned(header_bytes);
-                EntryHeader::ArroySetVectors(header)
+                EntryHeader::HannoySetVectors(header)
             }
             3 => {
-                let header_bytes = &remaining[..mem::size_of::<ArroySetVector>()];
+                let header_bytes = &remaining[..mem::size_of::<HannoySetVector>()];
                 let header = checked::pod_read_unaligned(header_bytes);
-                EntryHeader::ArroySetVector(header)
+                EntryHeader::HannoySetVector(header)
             }
             id => panic!("invalid variant id: {id}"),
         }
@@ -341,9 +341,9 @@ impl EntryHeader {
         let (first, remaining) = header_bytes.split_first_mut().unwrap();
         let payload_bytes = match self {
             EntryHeader::DbOperation(op) => bytemuck::bytes_of(op),
-            EntryHeader::ArroyDeleteVector(adv) => bytemuck::bytes_of(adv),
+            EntryHeader::HannoyDeleteVector(adv) => bytemuck::bytes_of(adv),
-            EntryHeader::ArroySetVectors(asvs) => bytemuck::bytes_of(asvs),
+            EntryHeader::HannoySetVectors(asvs) => bytemuck::bytes_of(asvs),
-            EntryHeader::ArroySetVector(asv) => bytemuck::bytes_of(asv),
+            EntryHeader::HannoySetVector(asv) => bytemuck::bytes_of(asv),
         };
         *first = self.variant_id();
         remaining.copy_from_slice(payload_bytes);
@@ -378,7 +378,7 @@ impl DbOperation {
 
 #[derive(Debug, Clone, Copy, NoUninit, CheckedBitPattern)]
 #[repr(transparent)]
-pub struct ArroyDeleteVector {
+pub struct HannoyDeleteVector {
     pub docid: DocumentId,
 }
 
@@ -386,13 +386,13 @@ pub struct ArroyDeleteVector {
 #[repr(C)]
 /// The embeddings are in the remaining space and represents
 /// non-aligned [f32] each with dimensions f32s.
-pub struct ArroySetVectors {
+pub struct HannoySetVectors {
     pub docid: DocumentId,
     pub embedder_id: u8,
     _padding: [u8; 3],
 }
 
-impl ArroySetVectors {
+impl HannoySetVectors {
     fn embeddings_bytes<'a>(frame: &'a FrameGrantR<'_>) -> &'a [u8] {
         let skip = EntryHeader::variant_size() + mem::size_of::<Self>();
         &frame[skip..]
@@ -416,14 +416,14 @@ impl ArroySetVectors {
 #[repr(C)]
 /// The embeddings are in the remaining space and represents
 /// non-aligned [f32] each with dimensions f32s.
-pub struct ArroySetVector {
+pub struct HannoySetVector {
     pub docid: DocumentId,
     pub embedder_id: u8,
     pub extractor_id: u8,
     _padding: [u8; 2],
 }
 
-impl ArroySetVector {
+impl HannoySetVector {
     fn embeddings_bytes<'a>(frame: &'a FrameGrantR<'_>) -> &'a [u8] {
         let skip = EntryHeader::variant_size() + mem::size_of::<Self>();
         &frame[skip..]
@@ -553,7 +553,7 @@ impl<'b> ExtractorBbqueueSender<'b> {
         let refcell = self.producers.get().unwrap();
         let mut producer = refcell.0.borrow_mut_or_yield();
 
-        let payload_header = EntryHeader::ArroyDeleteVector(ArroyDeleteVector { docid });
+        let payload_header = EntryHeader::HannoyDeleteVector(HannoyDeleteVector { docid });
         let total_length = EntryHeader::total_delete_vector_size();
         if total_length > max_grant {
             panic!("The entry is larger ({total_length} bytes) than the BBQueue max grant ({max_grant} bytes)");
@@ -589,8 +589,8 @@ impl<'b> ExtractorBbqueueSender<'b> {
         // to zero to allocate no extra space at all
         let dimensions = embeddings.first().map_or(0, |emb| emb.len());
 
-        let arroy_set_vector = ArroySetVectors { docid, embedder_id, _padding: [0; 3] };
+        let hannoy_set_vector = HannoySetVectors { docid, embedder_id, _padding: [0; 3] };
-        let payload_header = EntryHeader::ArroySetVectors(arroy_set_vector);
+        let payload_header = EntryHeader::HannoySetVectors(hannoy_set_vector);
         let total_length = EntryHeader::total_set_vectors_size(embeddings.len(), dimensions);
         if total_length > max_grant {
             let mut value_file = tempfile::tempfile().map(BufWriter::new)?;
@@ -650,9 +650,9 @@ impl<'b> ExtractorBbqueueSender<'b> {
         // to zero to allocate no extra space at all
         let dimensions = embedding.as_ref().map_or(0, |emb| emb.len());
 
-        let arroy_set_vector =
+        let hannoy_set_vector =
-            ArroySetVector { docid, embedder_id, extractor_id, _padding: [0; 2] };
+            HannoySetVector { docid, embedder_id, extractor_id, _padding: [0; 2] };
-        let payload_header = EntryHeader::ArroySetVector(arroy_set_vector);
+        let payload_header = EntryHeader::HannoySetVector(hannoy_set_vector);
         let total_length = EntryHeader::total_set_vector_size(dimensions);
         if total_length > max_grant {
             let mut value_file = tempfile::tempfile().map(BufWriter::new)?;

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

@@ -24,7 +24,7 @@ use crate::progress::{EmbedderStats, Progress};
 use crate::update::settings::SettingsDelta;
 use crate::update::GrenadParameters;
 use crate::vector::settings::{EmbedderAction, RemoveFragments, WriteBackToDocuments};
-use crate::vector::{ArroyWrapper, Embedder, RuntimeEmbedders};
+use crate::vector::{Embedder, HannoyWrapper, RuntimeEmbedders};
 use crate::{FieldsIdsMap, GlobalFieldsIdsMap, Index, InternalError, Result, ThreadPoolNoAbort};
 
 pub(crate) mod de;
@@ -66,7 +66,7 @@ where
     let mut bbbuffers = Vec::new();
     let finished_extraction = AtomicBool::new(false);
 
-    let arroy_memory = grenad_parameters.max_memory;
+    let hannoy_memory = grenad_parameters.max_memory;
 
     let (grenad_parameters, total_bbbuffer_capacity) =
         indexer_memory_settings(pool.current_num_threads(), grenad_parameters);
@@ -129,8 +129,8 @@ where
 
         let global_fields_ids_map = GlobalFieldsIdsMap::new(&new_fields_ids_map);
 
-        let vector_arroy = index.vector_arroy;
+        let vector_arroy = index.vector_hannoy;
-        let arroy_writers: Result<HashMap<_, _>> = embedders
+        let hannoy_writers: Result<HashMap<_, _>> = embedders
             .inner_as_ref()
             .iter()
             .map(|(embedder_name, runtime)| {
@@ -143,7 +143,7 @@ where
                     })?;
 
                 let dimensions = runtime.embedder.dimensions();
-                let writer = ArroyWrapper::new(vector_arroy, embedder_index, runtime.is_quantized);
+                let writer = HannoyWrapper::new(vector_arroy, embedder_index, runtime.is_quantized);
 
                 Ok((
                     embedder_index,
@@ -152,10 +152,10 @@ where
             })
             .collect();
 
-        let mut arroy_writers = arroy_writers?;
+        let mut hannoy_writers = hannoy_writers?;
 
         let congestion =
-            write_to_db(writer_receiver, finished_extraction, index, wtxn, &arroy_writers)?;
+            write_to_db(writer_receiver, finished_extraction, index, wtxn, &hannoy_writers)?;
 
         indexing_context.progress.update_progress(IndexingStep::WaitingForExtractors);
 
@@ -169,8 +169,8 @@ where
                 wtxn,
                 indexing_context.progress,
                 index_embeddings,
-                arroy_memory,
+                hannoy_memory,
-                &mut arroy_writers,
+                &mut hannoy_writers,
                 None,
                 &indexing_context.must_stop_processing,
             )
@@ -226,7 +226,7 @@ where
     let mut bbbuffers = Vec::new();
     let finished_extraction = AtomicBool::new(false);
 
-    let arroy_memory = grenad_parameters.max_memory;
+    let hannoy_memory = grenad_parameters.max_memory;
 
     let (grenad_parameters, total_bbbuffer_capacity) =
         indexer_memory_settings(pool.current_num_threads(), grenad_parameters);
@@ -283,7 +283,7 @@ where
         let new_embedders = settings_delta.new_embedders();
         let embedder_actions = settings_delta.embedder_actions();
         let index_embedder_category_ids = settings_delta.new_embedder_category_id();
-        let mut arroy_writers = arroy_writers_from_embedder_actions(
+        let mut hannoy_writers = hannoy_writers_from_embedder_actions(
             index,
             embedder_actions,
             new_embedders,
@@ -291,7 +291,7 @@ where
         )?;
 
         let congestion =
-            write_to_db(writer_receiver, finished_extraction, index, wtxn, &arroy_writers)?;
+            write_to_db(writer_receiver, finished_extraction, index, wtxn, &hannoy_writers)?;
 
         indexing_context.progress.update_progress(IndexingStep::WaitingForExtractors);
 
@@ -305,8 +305,8 @@ where
                 wtxn,
                 indexing_context.progress,
                 index_embeddings,
-                arroy_memory,
+                hannoy_memory,
-                &mut arroy_writers,
+                &mut hannoy_writers,
                 Some(embedder_actions),
                 &indexing_context.must_stop_processing,
             )
@@ -336,13 +336,13 @@ where
     Ok(congestion)
 }
 
-fn arroy_writers_from_embedder_actions<'indexer>(
+fn hannoy_writers_from_embedder_actions<'indexer>(
     index: &Index,
     embedder_actions: &'indexer BTreeMap<String, EmbedderAction>,
     embedders: &'indexer RuntimeEmbedders,
     index_embedder_category_ids: &'indexer std::collections::HashMap<String, u8>,
-) -> Result<HashMap<u8, (&'indexer str, &'indexer Embedder, ArroyWrapper, usize)>> {
+) -> Result<HashMap<u8, (&'indexer str, &'indexer Embedder, HannoyWrapper, usize)>> {
-    let vector_arroy = index.vector_arroy;
+    let vector_arroy = index.vector_hannoy;
 
     embedders
         .inner_as_ref()
@@ -361,7 +361,7 @@ fn arroy_writers_from_embedder_actions<'indexer>(
                     )));
                 };
                 let writer =
-                    ArroyWrapper::new(vector_arroy, embedder_category_id, action.was_quantized);
+                    HannoyWrapper::new(vector_arroy, embedder_category_id, action.was_quantized);
                 let dimensions = runtime.embedder.dimensions();
                 Some(Ok((
                     embedder_category_id,
@@ -384,7 +384,7 @@ where
         let Some(WriteBackToDocuments { embedder_id, .. }) = action.write_back() else {
             continue;
         };
-        let reader = ArroyWrapper::new(index.vector_arroy, *embedder_id, action.was_quantized);
+        let reader = HannoyWrapper::new(index.vector_hannoy, *embedder_id, action.was_quantized);
         let Some(dimensions) = reader.dimensions(wtxn)? else {
             continue;
         };
@@ -400,7 +400,7 @@ where
         let Some(infos) = index.embedding_configs().embedder_info(wtxn, embedder_name)? else {
             continue;
         };
-        let arroy = ArroyWrapper::new(index.vector_arroy, infos.embedder_id, was_quantized);
+        let arroy = HannoyWrapper::new(index.vector_hannoy, infos.embedder_id, was_quantized);
         let Some(dimensions) = arroy.dimensions(wtxn)? else {
             continue;
         };

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

@@ -15,7 +15,7 @@ use crate::progress::Progress;
 use crate::update::settings::InnerIndexSettings;
 use crate::vector::db::IndexEmbeddingConfig;
 use crate::vector::settings::EmbedderAction;
-use crate::vector::{ArroyWrapper, Embedder, Embeddings, RuntimeEmbedders};
+use crate::vector::{Embedder, Embeddings, HannoyWrapper, RuntimeEmbedders};
 use crate::{Error, Index, InternalError, Result, UserError};
 
 pub fn write_to_db(
@@ -23,9 +23,9 @@ pub fn write_to_db(
     finished_extraction: &AtomicBool,
     index: &Index,
     wtxn: &mut RwTxn<'_>,
-    arroy_writers: &HashMap<u8, (&str, &Embedder, ArroyWrapper, usize)>,
+    hannoy_writers: &HashMap<u8, (&str, &Embedder, HannoyWrapper, usize)>,
 ) -> Result<ChannelCongestion> {
-    // Used by by the ArroySetVector to copy the embedding into an
+    // Used by by the HannoySetVector to copy the embedding into an
     // aligned memory area, required by arroy to accept a new vector.
     let mut aligned_embedding = Vec::new();
     let span = tracing::trace_span!(target: "indexing::write_db", "all");
@@ -56,7 +56,7 @@ pub fn write_to_db(
             ReceiverAction::LargeVectors(large_vectors) => {
                 let LargeVectors { docid, embedder_id, .. } = large_vectors;
                 let (_, _, writer, dimensions) =
-                    arroy_writers.get(&embedder_id).expect("requested a missing embedder");
+                    hannoy_writers.get(&embedder_id).expect("requested a missing embedder");
                 let mut embeddings = Embeddings::new(*dimensions);
                 for embedding in large_vectors.read_embeddings(*dimensions) {
                     embeddings.push(embedding.to_vec()).unwrap();
@@ -68,7 +68,7 @@ pub fn write_to_db(
                 large_vector @ LargeVector { docid, embedder_id, extractor_id, .. },
             ) => {
                 let (_, _, writer, dimensions) =
-                    arroy_writers.get(&embedder_id).expect("requested a missing embedder");
+                    hannoy_writers.get(&embedder_id).expect("requested a missing embedder");
                 let embedding = large_vector.read_embedding(*dimensions);
                 writer.add_item_in_store(wtxn, docid, extractor_id, embedding)?;
             }
@@ -80,12 +80,12 @@ pub fn write_to_db(
             &mut writer_receiver,
             index,
             wtxn,
-            arroy_writers,
+            hannoy_writers,
             &mut aligned_embedding,
         )?;
     }
 
-    write_from_bbqueue(&mut writer_receiver, index, wtxn, arroy_writers, &mut aligned_embedding)?;
+    write_from_bbqueue(&mut writer_receiver, index, wtxn, hannoy_writers, &mut aligned_embedding)?;
 
     Ok(ChannelCongestion {
         attempts: writer_receiver.sent_messages_attempts(),
@@ -115,8 +115,8 @@ pub fn build_vectors<MSP>(
     wtxn: &mut RwTxn<'_>,
     progress: &Progress,
     index_embeddings: Vec<IndexEmbeddingConfig>,
-    arroy_memory: Option<usize>,
+    hannoy_memory: Option<usize>,
-    arroy_writers: &mut HashMap<u8, (&str, &Embedder, ArroyWrapper, usize)>,
+    hannoy_writers: &mut HashMap<u8, (&str, &Embedder, HannoyWrapper, usize)>,
     embeder_actions: Option<&BTreeMap<String, EmbedderAction>>,
     must_stop_processing: &MSP,
 ) -> Result<()>
@@ -129,7 +129,7 @@ where
 
     let seed = rand::random();
     let mut rng = rand::rngs::StdRng::seed_from_u64(seed);
-    for (_index, (embedder_name, _embedder, writer, dimensions)) in arroy_writers {
+    for (_index, (embedder_name, _embedder, writer, dimensions)) in hannoy_writers {
         let dimensions = *dimensions;
         let is_being_quantized = embeder_actions
             .and_then(|actions| actions.get(*embedder_name).map(|action| action.is_being_quantized))
@@ -140,7 +140,7 @@ where
             &mut rng,
             dimensions,
             is_being_quantized,
-            arroy_memory,
+            hannoy_memory,
             must_stop_processing,
         )?;
     }
@@ -181,7 +181,7 @@ pub fn write_from_bbqueue(
     writer_receiver: &mut WriterBbqueueReceiver<'_>,
     index: &Index,
     wtxn: &mut RwTxn<'_>,
-    arroy_writers: &HashMap<u8, (&str, &crate::vector::Embedder, ArroyWrapper, usize)>,
+    hannoy_writers: &HashMap<u8, (&str, &crate::vector::Embedder, HannoyWrapper, usize)>,
     aligned_embedding: &mut Vec<f32>,
 ) -> crate::Result<()> {
     while let Some(frame_with_header) = writer_receiver.recv_frame() {
@@ -221,17 +221,17 @@ pub fn write_from_bbqueue(
                     },
                 }
             }
-            EntryHeader::ArroyDeleteVector(ArroyDeleteVector { docid }) => {
+            EntryHeader::HannoyDeleteVector(HannoyDeleteVector { docid }) => {
-                for (_index, (_name, _embedder, writer, dimensions)) in arroy_writers {
+                for (_index, (_name, _embedder, writer, dimensions)) in hannoy_writers {
                     let dimensions = *dimensions;
                     writer.del_items(wtxn, dimensions, docid)?;
                 }
             }
-            EntryHeader::ArroySetVectors(asvs) => {
+            EntryHeader::HannoySetVectors(asvs) => {
-                let ArroySetVectors { docid, embedder_id, .. } = asvs;
+                let HannoySetVectors { docid, embedder_id, .. } = asvs;
                 let frame = frame_with_header.frame();
                 let (_, _, writer, dimensions) =
-                    arroy_writers.get(&embedder_id).expect("requested a missing embedder");
+                    hannoy_writers.get(&embedder_id).expect("requested a missing embedder");
                 let mut embeddings = Embeddings::new(*dimensions);
                 let all_embeddings = asvs.read_all_embeddings_into_vec(frame, aligned_embedding);
                 writer.del_items(wtxn, *dimensions, docid)?;
@@ -245,12 +245,12 @@ pub fn write_from_bbqueue(
                     writer.add_items(wtxn, docid, &embeddings)?;
                 }
             }
-            EntryHeader::ArroySetVector(
+            EntryHeader::HannoySetVector(
-                asv @ ArroySetVector { docid, embedder_id, extractor_id, .. },
+                asv @ HannoySetVector { docid, embedder_id, extractor_id, .. },
             ) => {
                 let frame = frame_with_header.frame();
                 let (_, _, writer, dimensions) =
-                    arroy_writers.get(&embedder_id).expect("requested a missing embedder");
+                    hannoy_writers.get(&embedder_id).expect("requested a missing embedder");
                 let embedding = asv.read_all_embeddings_into_vec(frame, aligned_embedding);
 
                 if embedding.is_empty() {

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

@@ -14,7 +14,7 @@ use crate::constants::RESERVED_VECTORS_FIELD_NAME;
 use crate::documents::FieldIdMapper;
 use crate::vector::db::{EmbeddingStatus, IndexEmbeddingConfig};
 use crate::vector::parsed_vectors::{RawVectors, RawVectorsError, VectorOrArrayOfVectors};
-use crate::vector::{ArroyWrapper, Embedding, RuntimeEmbedders};
+use crate::vector::{Embedding, HannoyWrapper, RuntimeEmbedders};
 use crate::{DocumentId, Index, InternalError, Result, UserError};
 
 #[derive(Serialize)]
@@ -121,7 +121,7 @@ impl<'t> VectorDocumentFromDb<'t> {
         status: &EmbeddingStatus,
     ) -> Result<VectorEntry<'t>> {
         let reader =
-            ArroyWrapper::new(self.index.vector_arroy, embedder_id, config.config.quantized());
+            HannoyWrapper::new(self.index.vector_hannoy, embedder_id, config.config.quantized());
         let vectors = reader.item_vectors(self.rtxn, self.docid)?;
 
         Ok(VectorEntry {
@@ -149,7 +149,7 @@ impl<'t> VectorDocument<'t> for VectorDocumentFromDb<'t> {
                     name,
                     entry_from_raw_value(value, false).map_err(|_| {
                         InternalError::Serialization(crate::SerializationError::Decoding {
-                            db_name: Some(crate::index::db_name::VECTOR_ARROY),
+                            db_name: Some(crate::index::db_name::VECTOR_HANNOY),
                         })
                     })?,
                 ))
@@ -167,7 +167,7 @@ impl<'t> VectorDocument<'t> for VectorDocumentFromDb<'t> {
                 Some(embedding_from_doc) => {
                     Some(entry_from_raw_value(embedding_from_doc, false).map_err(|_| {
                         InternalError::Serialization(crate::SerializationError::Decoding {
-                            db_name: Some(crate::index::db_name::VECTOR_ARROY),
+                            db_name: Some(crate::index::db_name::VECTOR_HANNOY),
                         })
                     })?)
                 }

crates/milli/src/update/upgrade/v1_14.rs

@@ -1,4 +1,4 @@
-use arroy::distances::Cosine;
+use hannoy::distances::Cosine;
 use heed::RwTxn;
 
 use super::UpgradeIndex;
@@ -25,12 +25,13 @@ impl UpgradeIndex for Latest_V1_13_To_Latest_V1_14 {
         progress.update_progress(VectorStore::UpdateInternalVersions);
 
         let rtxn = index.read_txn()?;
-        arroy::upgrade::from_0_5_to_0_6::<Cosine>(
+        // hannoy::upgrade::from_0_5_to_0_6::<Cosine>(
-            &rtxn,
+        //     &rtxn,
-            index.vector_arroy.remap_data_type(),
+        //     index.vector_hannoy.remap_data_type(),
-            wtxn,
+        //     wtxn,
-            index.vector_arroy.remap_data_type(),
+        //     index.vector_hannoy.remap_data_type(),
-        )?;
+        // )?;
+        unimplemented!("upgrade hannoy");
 
         Ok(false)
     }

crates/milli/src/vector/composite.rs

@@ -1,6 +1,6 @@
 use std::time::Instant;
 
-use arroy::Distance;
+use hannoy::Distance;
 
 use super::error::CompositeEmbedderContainsHuggingFace;
 use super::{
@@ -307,19 +307,18 @@ fn check_similarity(
     }
 
     for (left, right) in left.into_iter().zip(right) {
-        let left = arroy::internals::UnalignedVector::from_slice(&left);
+        let left = hannoy::internals::UnalignedVector::from_slice(&left);
-        let right = arroy::internals::UnalignedVector::from_slice(&right);
+        let right = hannoy::internals::UnalignedVector::from_slice(&right);
-        let left = arroy::internals::Leaf {
+        let left = hannoy::internals::Item {
-            header: arroy::distances::Cosine::new_header(&left),
+            header: hannoy::distances::Cosine::new_header(&left),
             vector: left,
         };
-        let right = arroy::internals::Leaf {
+        let right = hannoy::internals::Item {
-            header: arroy::distances::Cosine::new_header(&right),
+            header: hannoy::distances::Cosine::new_header(&right),
             vector: right,
         };
 
-        let distance = arroy::distances::Cosine::built_distance(&left, &right);
+        let distance = hannoy::distances::Cosine::distance(&left, &right);
-
         if distance > super::MAX_COMPOSITE_DISTANCE {
             return Err(NewEmbedderError::composite_embedding_value_mismatch(distance, hint));
         }

crates/milli/src/vector/mod.rs

@@ -3,9 +3,9 @@ use std::num::NonZeroUsize;
 use std::sync::{Arc, Mutex};
 use std::time::Instant;
 
-use arroy::distances::{BinaryQuantizedCosine, Cosine};
-use arroy::ItemId;
 use deserr::{DeserializeError, Deserr};
+use hannoy::distances::{BinaryQuantizedCosine, Cosine};
+use hannoy::ItemId;
 use heed::{RoTxn, RwTxn, Unspecified};
 use ordered_float::OrderedFloat;
 use roaring::RoaringBitmap;
@@ -41,15 +41,15 @@ pub type Embedding = Vec<f32>;
 pub const REQUEST_PARALLELISM: usize = 40;
 pub const MAX_COMPOSITE_DISTANCE: f32 = 0.01;
 
-pub struct ArroyWrapper {
+pub struct HannoyWrapper {
     quantized: bool,
     embedder_index: u8,
-    database: arroy::Database<Unspecified>,
+    database: hannoy::Database<Unspecified>,
 }
 
-impl ArroyWrapper {
+impl HannoyWrapper {
     pub fn new(
-        database: arroy::Database<Unspecified>,
+        database: hannoy::Database<Unspecified>,
         embedder_index: u8,
         quantized: bool,
     ) -> Self {
@@ -60,19 +60,19 @@ impl ArroyWrapper {
         self.embedder_index
     }
 
-    fn readers<'a, D: arroy::Distance>(
+    fn readers<'a, D: hannoy::Distance>(
         &'a self,
         rtxn: &'a RoTxn<'a>,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
-    ) -> impl Iterator<Item = Result<arroy::Reader<'a, D>, arroy::Error>> + 'a {
+    ) -> impl Iterator<Item = Result<hannoy::Reader<'a, D>, hannoy::Error>> + 'a {
-        arroy_store_range_for_embedder(self.embedder_index).filter_map(move |index| {
+        hannoy_store_range_for_embedder(self.embedder_index).filter_map(move |index| {
-            match arroy::Reader::open(rtxn, index, db) {
+            match hannoy::Reader::open(rtxn, index, db) {
                 Ok(reader) => match reader.is_empty(rtxn) {
                     Ok(false) => Some(Ok(reader)),
                     Ok(true) => None,
                     Err(e) => Some(Err(e)),
                 },
-                Err(arroy::Error::MissingMetadata(_)) => None,
+                Err(hannoy::Error::MissingMetadata(_)) => None,
                 Err(e) => Some(Err(e)),
             }
         })
@@ -86,7 +86,7 @@ impl ArroyWrapper {
         rtxn: &RoTxn,
         store_id: u8,
         with_items: F,
-    ) -> Result<O, arroy::Error>
+    ) -> Result<O, hannoy::Error>
     where
         F: FnOnce(&RoaringBitmap) -> O,
     {
@@ -97,26 +97,26 @@ impl ArroyWrapper {
         }
     }
 
-    fn _items_in_store<D: arroy::Distance, F, O>(
+    fn _items_in_store<D: hannoy::Distance, F, O>(
         &self,
         rtxn: &RoTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
         store_id: u8,
         with_items: F,
-    ) -> Result<O, arroy::Error>
+    ) -> Result<O, hannoy::Error>
     where
         F: FnOnce(&RoaringBitmap) -> O,
     {
-        let index = arroy_store_for_embedder(self.embedder_index, store_id);
+        let index = hannoy_store_for_embedder(self.embedder_index, store_id);
-        let reader = arroy::Reader::open(rtxn, index, db);
+        let reader = hannoy::Reader::open(rtxn, index, db);
         match reader {
             Ok(reader) => Ok(with_items(reader.item_ids())),
-            Err(arroy::Error::MissingMetadata(_)) => Ok(with_items(&RoaringBitmap::new())),
+            Err(hannoy::Error::MissingMetadata(_)) => Ok(with_items(&RoaringBitmap::new())),
             Err(err) => Err(err),
         }
     }
 
-    pub fn dimensions(&self, rtxn: &RoTxn) -> Result<Option<usize>, arroy::Error> {
+    pub fn dimensions(&self, rtxn: &RoTxn) -> Result<Option<usize>, hannoy::Error> {
         if self.quantized {
             Ok(self
                 .readers(rtxn, self.quantized_db())
@@ -140,39 +140,40 @@ impl ArroyWrapper {
         rng: &mut R,
         dimension: usize,
         quantizing: bool,
-        arroy_memory: Option<usize>,
+        hannoy_memory: Option<usize>,
         cancel: &(impl Fn() -> bool + Sync + Send),
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
-        for index in arroy_store_range_for_embedder(self.embedder_index) {
+        for index in hannoy_store_range_for_embedder(self.embedder_index) {
             if self.quantized {
-                let writer = arroy::Writer::new(self.quantized_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.quantized_db(), index, dimension);
                 if writer.need_build(wtxn)? {
-                    writer.builder(rng).build(wtxn)?
+                    writer.builder(rng).build::<16, 32>(wtxn)?
                 } else if writer.is_empty(wtxn)? {
                     continue;
                 }
             } else {
-                let writer = arroy::Writer::new(self.angular_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.angular_db(), index, dimension);
                 // If we are quantizing the databases, we can't know from meilisearch
                 // if the db was empty but still contained the wrong metadata, thus we need
                 // to quantize everything and can't stop early. Since this operation can
                 // only happens once in the life of an embedder, it's not very performances
                 // sensitive.
                 if quantizing && !self.quantized {
-                    let writer = writer.prepare_changing_distance::<BinaryQuantizedCosine>(wtxn)?;
+                    // let writer = writer.prepare_changing_distance::<BinaryQuantizedCosine>(wtxn)?;
-                    writer
+                    // writer
-                        .builder(rng)
+                    //     .builder(rng)
-                        .available_memory(arroy_memory.unwrap_or(usize::MAX))
+                    //     .available_memory(hannoy_memory.unwrap_or(usize::MAX))
-                        .progress(|step| progress.update_progress_from_arroy(step))
+                    //     .progress(|step| progress.update_progress_from_hannoy(step))
-                        .cancel(cancel)
+                    //     .cancel(cancel)
-                        .build(wtxn)?;
+                    //     .build(wtxn)?;
+                    unimplemented!("switching from quantized to non-quantized");
                 } else if writer.need_build(wtxn)? {
                     writer
                         .builder(rng)
-                        .available_memory(arroy_memory.unwrap_or(usize::MAX))
+                        .available_memory(hannoy_memory.unwrap_or(usize::MAX))
-                        .progress(|step| progress.update_progress_from_arroy(step))
+                        // .progress(|step| progress.update_progress_from_hannoy(step))
-                        .cancel(cancel)
+                        // .cancel(cancel)
-                        .build(wtxn)?;
+                        .build::<16, 32>(wtxn)?;
                 } else if writer.is_empty(wtxn)? {
                     continue;
                 }
@@ -188,18 +189,18 @@ impl ArroyWrapper {
     pub fn add_items(
         &self,
         wtxn: &mut RwTxn,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         embeddings: &Embeddings<f32>,
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         let dimension = embeddings.dimension();
         for (index, vector) in
-            arroy_store_range_for_embedder(self.embedder_index).zip(embeddings.iter())
+            hannoy_store_range_for_embedder(self.embedder_index).zip(embeddings.iter())
         {
             if self.quantized {
-                arroy::Writer::new(self.quantized_db(), index, dimension)
+                hannoy::Writer::new(self.quantized_db(), index, dimension)
                     .add_item(wtxn, item_id, vector)?
             } else {
-                arroy::Writer::new(self.angular_db(), index, dimension)
+                hannoy::Writer::new(self.angular_db(), index, dimension)
                     .add_item(wtxn, item_id, vector)?
             }
         }
@@ -210,9 +211,9 @@ impl ArroyWrapper {
     pub fn add_item(
         &self,
         wtxn: &mut RwTxn,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         vector: &[f32],
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         if self.quantized {
             self._add_item(wtxn, self.quantized_db(), item_id, vector)
         } else {
@@ -220,17 +221,17 @@ impl ArroyWrapper {
         }
     }
 
-    fn _add_item<D: arroy::Distance>(
+    fn _add_item<D: hannoy::Distance>(
         &self,
         wtxn: &mut RwTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         vector: &[f32],
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         let dimension = vector.len();
 
-        for index in arroy_store_range_for_embedder(self.embedder_index) {
+        for index in hannoy_store_range_for_embedder(self.embedder_index) {
-            let writer = arroy::Writer::new(db, index, dimension);
+            let writer = hannoy::Writer::new(db, index, dimension);
             if !writer.contains_item(wtxn, item_id)? {
                 writer.add_item(wtxn, item_id, vector)?;
                 break;
@@ -245,10 +246,10 @@ impl ArroyWrapper {
     pub fn add_item_in_store(
         &self,
         wtxn: &mut RwTxn,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         store_id: u8,
         vector: &[f32],
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         if self.quantized {
             self._add_item_in_store(wtxn, self.quantized_db(), item_id, store_id, vector)
         } else {
@@ -256,18 +257,18 @@ impl ArroyWrapper {
         }
     }
 
-    fn _add_item_in_store<D: arroy::Distance>(
+    fn _add_item_in_store<D: hannoy::Distance>(
         &self,
         wtxn: &mut RwTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         store_id: u8,
         vector: &[f32],
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         let dimension = vector.len();
 
-        let index = arroy_store_for_embedder(self.embedder_index, store_id);
+        let index = hannoy_store_for_embedder(self.embedder_index, store_id);
-        let writer = arroy::Writer::new(db, index, dimension);
+        let writer = hannoy::Writer::new(db, index, dimension);
         writer.add_item(wtxn, item_id, vector)
     }
 
@@ -276,14 +277,14 @@ impl ArroyWrapper {
         &self,
         wtxn: &mut RwTxn,
         dimension: usize,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
-        for index in arroy_store_range_for_embedder(self.embedder_index) {
+        for index in hannoy_store_range_for_embedder(self.embedder_index) {
             if self.quantized {
-                let writer = arroy::Writer::new(self.quantized_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.quantized_db(), index, dimension);
                 writer.del_item(wtxn, item_id)?;
             } else {
-                let writer = arroy::Writer::new(self.angular_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.angular_db(), index, dimension);
                 writer.del_item(wtxn, item_id)?;
             }
         }
@@ -301,10 +302,10 @@ impl ArroyWrapper {
     pub fn del_item_in_store(
         &self,
         wtxn: &mut RwTxn,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         store_id: u8,
         dimensions: usize,
-    ) -> Result<bool, arroy::Error> {
+    ) -> Result<bool, hannoy::Error> {
         if self.quantized {
             self._del_item_in_store(wtxn, self.quantized_db(), item_id, store_id, dimensions)
         } else {
@@ -312,16 +313,16 @@ impl ArroyWrapper {
         }
     }
 
-    fn _del_item_in_store<D: arroy::Distance>(
+    fn _del_item_in_store<D: hannoy::Distance>(
         &self,
         wtxn: &mut RwTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         store_id: u8,
         dimensions: usize,
-    ) -> Result<bool, arroy::Error> {
+    ) -> Result<bool, hannoy::Error> {
-        let index = arroy_store_for_embedder(self.embedder_index, store_id);
+        let index = hannoy_store_for_embedder(self.embedder_index, store_id);
-        let writer = arroy::Writer::new(db, index, dimensions);
+        let writer = hannoy::Writer::new(db, index, dimensions);
         writer.del_item(wtxn, item_id)
     }
 
@@ -335,7 +336,7 @@ impl ArroyWrapper {
         wtxn: &mut RwTxn,
         store_id: u8,
         dimensions: usize,
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         if self.quantized {
             self._clear_store(wtxn, self.quantized_db(), store_id, dimensions)
         } else {
@@ -343,15 +344,15 @@ impl ArroyWrapper {
         }
     }
 
-    fn _clear_store<D: arroy::Distance>(
+    fn _clear_store<D: hannoy::Distance>(
         &self,
         wtxn: &mut RwTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
         store_id: u8,
         dimensions: usize,
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
-        let index = arroy_store_for_embedder(self.embedder_index, store_id);
+        let index = hannoy_store_for_embedder(self.embedder_index, store_id);
-        let writer = arroy::Writer::new(db, index, dimensions);
+        let writer = hannoy::Writer::new(db, index, dimensions);
         writer.clear(wtxn)
     }
 
@@ -359,9 +360,9 @@ impl ArroyWrapper {
     pub fn del_item(
         &self,
         wtxn: &mut RwTxn,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         vector: &[f32],
-    ) -> Result<bool, arroy::Error> {
+    ) -> Result<bool, hannoy::Error> {
         if self.quantized {
             self._del_item(wtxn, self.quantized_db(), item_id, vector)
         } else {
@@ -369,37 +370,34 @@ impl ArroyWrapper {
         }
     }
 
-    fn _del_item<D: arroy::Distance>(
+    fn _del_item<D: hannoy::Distance>(
         &self,
         wtxn: &mut RwTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
-        item_id: arroy::ItemId,
+        item_id: hannoy::ItemId,
         vector: &[f32],
-    ) -> Result<bool, arroy::Error> {
+    ) -> Result<bool, hannoy::Error> {
         let dimension = vector.len();
 
-        for index in arroy_store_range_for_embedder(self.embedder_index) {
+        for index in hannoy_store_range_for_embedder(self.embedder_index) {
-            let writer = arroy::Writer::new(db, index, dimension);
+            let writer = hannoy::Writer::new(db, index, dimension);
-            let Some(candidate) = writer.item_vector(wtxn, item_id)? else {
+            if writer.contains_item(wtxn, item_id)? {
-                continue;
-            };
-            if candidate == vector {
                 return writer.del_item(wtxn, item_id);
             }
         }
         Ok(false)
     }
 
-    pub fn clear(&self, wtxn: &mut RwTxn, dimension: usize) -> Result<(), arroy::Error> {
+    pub fn clear(&self, wtxn: &mut RwTxn, dimension: usize) -> Result<(), hannoy::Error> {
-        for index in arroy_store_range_for_embedder(self.embedder_index) {
+        for index in hannoy_store_range_for_embedder(self.embedder_index) {
             if self.quantized {
-                let writer = arroy::Writer::new(self.quantized_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.quantized_db(), index, dimension);
                 if writer.is_empty(wtxn)? {
                     continue;
                 }
                 writer.clear(wtxn)?;
             } else {
-                let writer = arroy::Writer::new(self.angular_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.angular_db(), index, dimension);
                 if writer.is_empty(wtxn)? {
                     continue;
                 }
@@ -413,17 +411,17 @@ impl ArroyWrapper {
         &self,
         rtxn: &RoTxn,
         dimension: usize,
-        item: arroy::ItemId,
+        item: hannoy::ItemId,
-    ) -> Result<bool, arroy::Error> {
+    ) -> Result<bool, hannoy::Error> {
-        for index in arroy_store_range_for_embedder(self.embedder_index) {
+        for index in hannoy_store_range_for_embedder(self.embedder_index) {
             let contains = if self.quantized {
-                let writer = arroy::Writer::new(self.quantized_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.quantized_db(), index, dimension);
                 if writer.is_empty(rtxn)? {
                     continue;
                 }
                 writer.contains_item(rtxn, item)?
             } else {
-                let writer = arroy::Writer::new(self.angular_db(), index, dimension);
+                let writer = hannoy::Writer::new(self.angular_db(), index, dimension);
                 if writer.is_empty(rtxn)? {
                     continue;
                 }
@@ -442,7 +440,7 @@ impl ArroyWrapper {
         item: ItemId,
         limit: usize,
         filter: Option<&RoaringBitmap>,
-    ) -> Result<Vec<(ItemId, f32)>, arroy::Error> {
+    ) -> Result<Vec<(ItemId, f32)>, hannoy::Error> {
         if self.quantized {
             self._nns_by_item(rtxn, self.quantized_db(), item, limit, filter)
         } else {
@@ -450,24 +448,25 @@ impl ArroyWrapper {
         }
     }
 
-    fn _nns_by_item<D: arroy::Distance>(
+    fn _nns_by_item<D: hannoy::Distance>(
         &self,
         rtxn: &RoTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
         item: ItemId,
         limit: usize,
         filter: Option<&RoaringBitmap>,
-    ) -> Result<Vec<(ItemId, f32)>, arroy::Error> {
+    ) -> Result<Vec<(ItemId, f32)>, hannoy::Error> {
         let mut results = Vec::new();
 
         for reader in self.readers(rtxn, db) {
             let reader = reader?;
-            let mut searcher = reader.nns(limit);
+            let searcher = reader.nns(limit, limit * 2); // TODO find better ef
             if let Some(filter) = filter {
                 if reader.item_ids().is_disjoint(filter) {
                     continue;
                 }
-                searcher.candidates(filter);
+                unimplemented!("Hannoy doesn't support filtering");
+                // searcher.candidates(filter);
             }
 
             if let Some(mut ret) = searcher.by_item(rtxn, item)? {
@@ -484,7 +483,7 @@ impl ArroyWrapper {
         vector: &[f32],
         limit: usize,
         filter: Option<&RoaringBitmap>,
-    ) -> Result<Vec<(ItemId, f32)>, arroy::Error> {
+    ) -> Result<Vec<(ItemId, f32)>, hannoy::Error> {
         if self.quantized {
             self._nns_by_vector(rtxn, self.quantized_db(), vector, limit, filter)
         } else {
@@ -492,24 +491,25 @@ impl ArroyWrapper {
         }
     }
 
-    fn _nns_by_vector<D: arroy::Distance>(
+    fn _nns_by_vector<D: hannoy::Distance>(
         &self,
         rtxn: &RoTxn,
-        db: arroy::Database<D>,
+        db: hannoy::Database<D>,
         vector: &[f32],
         limit: usize,
         filter: Option<&RoaringBitmap>,
-    ) -> Result<Vec<(ItemId, f32)>, arroy::Error> {
+    ) -> Result<Vec<(ItemId, f32)>, hannoy::Error> {
         let mut results = Vec::new();
 
         for reader in self.readers(rtxn, db) {
             let reader = reader?;
-            let mut searcher = reader.nns(limit);
+            let searcher = reader.nns(limit, limit * 2); // TODO find better ef
             if let Some(filter) = filter {
                 if reader.item_ids().is_disjoint(filter) {
                     continue;
                 }
-                searcher.candidates(filter);
+                unimplemented!("Hannoy doesn't support filteting");
+                // searcher.candidates(filter);
             }
 
             results.append(&mut searcher.by_vector(rtxn, vector)?);
@@ -520,7 +520,7 @@ impl ArroyWrapper {
         Ok(results)
     }
 
-    pub fn item_vectors(&self, rtxn: &RoTxn, item_id: u32) -> Result<Vec<Vec<f32>>, arroy::Error> {
+    pub fn item_vectors(&self, rtxn: &RoTxn, item_id: u32) -> Result<Vec<Vec<f32>>, hannoy::Error> {
         let mut vectors = Vec::new();
 
         if self.quantized {
@@ -539,19 +539,19 @@ impl ArroyWrapper {
         Ok(vectors)
     }
 
-    fn angular_db(&self) -> arroy::Database<Cosine> {
+    fn angular_db(&self) -> hannoy::Database<Cosine> {
         self.database.remap_data_type()
     }
 
-    fn quantized_db(&self) -> arroy::Database<BinaryQuantizedCosine> {
+    fn quantized_db(&self) -> hannoy::Database<BinaryQuantizedCosine> {
         self.database.remap_data_type()
     }
 
     pub fn aggregate_stats(
         &self,
         rtxn: &RoTxn,
-        stats: &mut ArroyStats,
+        stats: &mut HannoyStats,
-    ) -> Result<(), arroy::Error> {
+    ) -> Result<(), hannoy::Error> {
         if self.quantized {
             for reader in self.readers(rtxn, self.quantized_db()) {
                 let reader = reader?;
@@ -579,10 +579,11 @@ impl ArroyWrapper {
 }
 
 #[derive(Debug, Default, Clone)]
-pub struct ArroyStats {
+pub struct HannoyStats {
     pub number_of_embeddings: u64,
     pub documents: RoaringBitmap,
 }
+
 /// One or multiple embeddings stored consecutively in a flat vector.
 #[derive(Debug, PartialEq)]
 pub struct Embeddings<F> {
@@ -1208,11 +1209,11 @@ pub const fn is_cuda_enabled() -> bool {
     cfg!(feature = "cuda")
 }
 
-fn arroy_store_range_for_embedder(embedder_id: u8) -> impl Iterator<Item = u16> {
+fn hannoy_store_range_for_embedder(embedder_id: u8) -> impl Iterator<Item = u16> {
-    (0..=u8::MAX).map(move |store_id| arroy_store_for_embedder(embedder_id, store_id))
+    (0..=u8::MAX).map(move |store_id| hannoy_store_for_embedder(embedder_id, store_id))
 }
 
-fn arroy_store_for_embedder(embedder_id: u8, store_id: u8) -> u16 {
+fn hannoy_store_for_embedder(embedder_id: u8, store_id: u8) -> u16 {
     let embedder_id = (embedder_id as u16) << 8;
     embedder_id | (store_id as u16)
 }