Use the DeCboRoaringBitmapCodec everywhere

Remove risk of command injection

.github/ISSUE_TEMPLATE/new_feature_issue.md

@@ -24,6 +24,11 @@ TBD
 - [ ] If not, add the `no db change` label to your PR, and you're good to merge.
 - [ ] If yes, add the `db change` label to your PR. You'll receive a message explaining you what to do.
 
+### Reminders when adding features
+
+- [ ] Write unit tests using insta
+- [ ] Write declarative integration tests in [workloads/tests](https://github.com/meilisearch/meilisearch/tree/main/workloads/test). Specify the routes to call and then call `cargo xtask test workloads/tests/YOUR_TEST.json --update-responses` so that responses are automatically filled.
+
 ### Reminders when modifying the API
 
 - [ ] Update the openAPI file with utoipa:

.github/workflows/bench-manual.yml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 180 # 3h
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/bench-pr.yml

@@ -66,7 +66,7 @@ jobs:
           fetch-depth: 0 # fetch full history to be able to get main commit sha
           ref: ${{ steps.comment-branch.outputs.head_ref }}
 
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
 
       - name: Run benchmarks on PR ${{ github.event.issue.id }}
         run: |

.github/workflows/bench-push-indexing.yml

@@ -12,7 +12,7 @@ jobs:
     timeout-minutes: 180 # 3h
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
 
       # Run benchmarks
       - name: Run benchmarks - Dataset ${BENCH_NAME} - Branch main - Commit ${{ github.sha }}

.github/workflows/benchmarks-manual.yml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 4320 # 72h
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/benchmarks-pr.yml

@@ -44,7 +44,7 @@ jobs:
             exit 1
           fi
 
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/benchmarks-push-indexing.yml

@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 4320 # 72h
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/benchmarks-push-search-geo.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: benchmarks
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/benchmarks-push-search-songs.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: benchmarks
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/benchmarks-push-search-wiki.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: benchmarks
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           profile: minimal
 

.github/workflows/db-change-comments.yml

@@ -19,6 +19,7 @@ env:
 
     - [ ] Detail the change to the DB format and why they are forward compatible
     - [ ] Forward-compatibility: A database created before this PR and using the features touched by this PR was able to be opened by a Meilisearch produced by the code of this PR.
+    - [ ] Declarative test: add a [declarative test containing a dumpless upgrade](https://github.com/meilisearch/meilisearch/blob/main/TESTING.md#typical-usage)
 
 
     ## This PR makes breaking changes
@@ -35,8 +36,7 @@ env:
       - [ ] Write the code to go from the old database to the new one
         - If the change happened in milli, the upgrade function should be written and called [here](https://github.com/meilisearch/meilisearch/blob/3fd86e8d76d7d468b0095d679adb09211ca3b6c0/crates/milli/src/update/upgrade/mod.rs#L24-L47)
         - If the change happened in the index-scheduler, we've never done it yet, but the right place to do it should be [here](https://github.com/meilisearch/meilisearch/blob/3fd86e8d76d7d468b0095d679adb09211ca3b6c0/crates/index-scheduler/src/scheduler/process_upgrade/mod.rs#L13)
-      - [ ] Write an integration test [here](https://github.com/meilisearch/meilisearch/blob/main/crates/meilisearch/tests/upgrade/mod.rs) ensuring you can read the old database, upgrade to the new database, and read the new database as expected
-    
+      - [ ] Declarative test: add a [declarative test containing a dumpless upgrade](https://github.com/meilisearch/meilisearch/blob/main/TESTING.md#typical-usage)
 
 jobs:
   add-comment:

.github/workflows/flaky-tests.yml

@@ -3,7 +3,7 @@ name: Look for flaky tests
 on:
   workflow_dispatch:
   schedule:
-    - cron: '0 4 * * *' # Every day at 4:00AM
+    - cron: "0 4 * * *" # Every day at 4:00AM
 
 jobs:
   flaky:
@@ -23,7 +23,7 @@ jobs:
         run: |
           apt-get update && apt-get install -y curl
           apt-get install build-essential -y
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Install cargo-flaky
         run: cargo install cargo-flaky
       - name: Run cargo flaky in the dumps

.github/workflows/fuzzer-indexing.yml

@@ -12,7 +12,7 @@ jobs:
     timeout-minutes: 4320 # 72h
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
 
       # Run benchmarks
       - name: Run the fuzzer

.github/workflows/publish-apt-brew-pkg.yml

@@ -31,7 +31,7 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Install cargo-deb
         run: cargo install cargo-deb
       - uses: actions/checkout@v5

.github/workflows/publish-docker-images.yml

@@ -208,8 +208,8 @@ jobs:
           done
           cosign sign --yes ${images}
 
-      # /!\ Don't touch this without checking with Cloud team
-      - name: Send CI information to Cloud team
+      # /!\ Don't touch this without checking with engineers working on the Cloud code base on #discussion-engineering Slack channel
+      - name: Notify meilisearch-cloud 
         # Do not send if nightly build (i.e. 'schedule' or 'workflow_dispatch' event)
         if: ${{ (github.event_name == 'push') && (matrix.edition == 'enterprise') }}
         uses: peter-evans/repository-dispatch@v3
@@ -218,3 +218,14 @@ jobs:
           repository: meilisearch/meilisearch-cloud
           event-type: cloud-docker-build
           client-payload: '{ "meilisearch_version": "${{ github.ref_name }}", "stable": "${{ steps.check-tag-format.outputs.stable }}" }'
+
+      # /!\ Don't touch this without checking with integration team members on #discussion-integrations Slack channel 
+      - name: Notify meilisearch-kubernetes
+        # Do not send if nightly build (i.e. 'schedule' or 'workflow_dispatch' event), or if not stable
+        if: ${{ github.event_name == 'push' && matrix.edition == 'community' && steps.check-tag-format.outputs.stable == 'true' }}
+        uses: peter-evans/repository-dispatch@v3
+        with:
+          token: ${{ secrets.MEILI_BOT_GH_PAT }}
+          repository: meilisearch/meilisearch-kubernetes
+          event-type: meilisearch-release
+          client-payload: '{ "version": "${{ github.ref_name }}" }'

.github/workflows/publish-release-assets.yml

@@ -76,7 +76,7 @@ jobs:
     needs: check-version
     steps:
       - uses: actions/checkout@v5
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Build
         run: cargo build --release --locked ${{ matrix.feature-flag }} ${{ matrix.extra-args }}
       # No need to upload binaries for dry run (cron or workflow_dispatch)

.github/workflows/sdks-tests.yml

@@ -25,14 +25,18 @@ jobs:
       - uses: actions/checkout@v5
       - name: Define the Docker image we need to use
         id: define-image
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          DOCKER_IMAGE_INPUT: ${{ github.event.inputs.docker_image }}
         run: |
-          event=${{ github.event_name }}
           echo "docker-image=nightly" >> $GITHUB_OUTPUT
-          if [[ $event == 'workflow_dispatch' ]]; then
-            echo "docker-image=${{ github.event.inputs.docker_image }}" >> $GITHUB_OUTPUT
+          if [[ "$EVENT_NAME" == 'workflow_dispatch' ]]; then
+            echo "docker-image=$DOCKER_IMAGE_INPUT" >> $GITHUB_OUTPUT
           fi
       - name: Docker image is ${{ steps.define-image.outputs.docker-image }}
-        run: echo "Docker image is ${{ steps.define-image.outputs.docker-image }}"
+        env:
+          DOCKER_IMAGE: ${{ steps.define-image.outputs.docker-image }}
+        run: echo "Docker image is $DOCKER_IMAGE"
 
 ##########
 ## SDKs ##

.github/workflows/test-suite.yml

@@ -34,7 +34,7 @@ jobs:
       - name: check free space after
         run: df -h
       - name: Setup test with Rust stable
-        uses: dtolnay/rust-toolchain@1.89
+        uses: dtolnay/rust-toolchain@1.91.1
       - name: Cache dependencies
         uses: Swatinem/rust-cache@v2.8.0
         with:
@@ -63,7 +63,7 @@ jobs:
       - uses: actions/checkout@v5
       - name: Cache dependencies
         uses: Swatinem/rust-cache@v2.8.0
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Run cargo build without any default features
         uses: actions-rs/cargo@v1
         with:
@@ -87,7 +87,7 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Run cargo build with almost all features
         run: |
           cargo build --workspace --locked --features "$(cargo xtask list-features --exclude-feature cuda,test-ollama)"
@@ -145,7 +145,7 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Run cargo tree without default features and check lindera is not present
         run: |
           if cargo tree -f '{p} {f}' -e normal --no-default-features | grep -qz lindera; then
@@ -167,14 +167,11 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Cache dependencies
         uses: Swatinem/rust-cache@v2.8.0
-      - name: Run cargo build in release
-        uses: actions-rs/cargo@v1
-        with:
-          command: build
-          args: --all-targets --release
+      - name: Build
+        run: cargo build --release --locked --target x86_64-unknown-linux-gnu
 
   clippy:
     name: Run Clippy
@@ -190,7 +187,7 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           components: clippy
       - name: Cache dependencies
@@ -212,7 +209,7 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
         with:
           components: rustfmt
       - name: Cache dependencies
@@ -224,3 +221,23 @@ jobs:
         run: |
           echo -ne "\n" > crates/benchmarks/benches/datasets_paths.rs
           cargo fmt --all -- --check
+
+  declarative-tests:
+    name: Run declarative tests
+    runs-on: ubuntu-22.04-arm
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v5
+      - name: Clean space as per https://github.com/actions/virtual-environments/issues/709
+        run: |
+          sudo rm -rf "/opt/ghc" || true
+          sudo rm -rf "/usr/share/dotnet" || true
+          sudo rm -rf "/usr/local/lib/android" || true
+          sudo rm -rf "/usr/local/share/boost" || true
+      - uses: dtolnay/rust-toolchain@1.91.1
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2.8.0
+      - name: Run declarative tests
+        run: |
+          cargo xtask test workloads/tests/*.json

.github/workflows/update-cargo-toml-version.yml

@@ -24,7 +24,7 @@ jobs:
           sudo rm -rf "/usr/share/dotnet" || true
           sudo rm -rf "/usr/local/lib/android" || true
           sudo rm -rf "/usr/local/share/boost" || true
-      - uses: dtolnay/rust-toolchain@1.89
+      - uses: dtolnay/rust-toolchain@1.91.1
       - name: Install sd
         run: cargo install sd
       - name: Update Cargo.toml file

BENCHMARKS.md

@@ -124,6 +124,7 @@ They are JSON files with the following structure (comments are not actually supp
 {
   // Name of the workload. Must be unique to the workload, as it will be used to group results on the dashboard.
   "name": "hackernews.ndjson_1M,no-threads",
+  "type": "bench",
   // Number of consecutive runs of the commands that should be performed.
   // Each run uses a fresh instance of Meilisearch and a fresh database.
   // Each run produces its own report file.

Cargo.toml

@@ -23,7 +23,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.28.2"
+version = "1.29.0"
 authors = [
     "Quentin de Quelen <quentin@dequelen.me>",
     "Clément Renault <clement@meilisearch.com>",

TESTING.md

@@ -0,0 +1,326 @@
+# Declarative tests
+
+Declarative tests ensure that Meilisearch features remain stable across versions.
+
+While we already have unit tests, those are run against **temporary databases** that are created fresh each time and therefore never risk corruption.
+
+Declarative tests instead **simulate the lifetime of a database**: they chain together commands and requests to change the binary, verifying that database state and API responses remain consistent.
+
+## Basic example
+
+```jsonc
+{
+  "type": "test",
+  "name": "api-keys",
+  "binary": { // the first command will run on the binary following this specification.
+    "source": "release", // get the binary as a release from GitHub
+    "version": "1.19.0", // version to fetch
+    "edition": "community" // edition to fetch
+  },
+  "commands": []
+}
+```
+
+This example defines a no-op test (it does nothing).
+
+If the file is saved at `workloads/tests/example.json`, you can run it with:
+
+```bash
+cargo xtask test workloads/tests/example.json
+```
+
+## Commands
+
+Commands represent API requests sent to Meilisearch endpoints during a test.
+
+They are executed sequentially, and their responses can be validated to ensure consistent behavior across upgrades.
+
+```jsonc
+
+{
+  "route": "keys",
+  "method": "POST",
+  "body": {
+    "inline": {
+      "actions": [
+        "search",
+        "documents.add"
+      ],
+      "description": "Test API Key",
+      "expiresAt": null,
+      "indexes": [ "movies" ]
+    }
+  }
+}
+```
+
+This command issues a `POST /keys` request, creating an API key with permissions to search and add documents in the `movies` index.
+
+### Using assets in commands
+
+To keep tests concise and reusable, you can define **assets** at the root of the workload file.
+
+Assets are external data sources (such as datasets) that are cached between runs, making tests faster and easier to read.
+
+```jsonc
+{
+  "type": "test",
+  "name": "movies",
+  "binary": {
+    "source": "release",
+    "version": "1.19.0",
+    "edition": "community"
+  },
+  "assets": {
+    "movies.json": {
+      "local_location": null,
+      "remote_location": "https://milli-benchmarks.fra1.digitaloceanspaces.com/bench/datasets/movies.json",
+      "sha256": "5b6e4cb660bc20327776e8a33ea197b43d9ec84856710ead1cc87ab24df77de1"
+    }
+  },
+  "commands": [
+    {
+      "route": "indexes/movies/documents",
+      "method": "POST",
+      "body": {
+        "asset": "movies.json"
+      }
+    }
+  ]
+}
+```
+
+In this example:
+- The `movies.json` dataset is defined as an asset, pointing to a remote URL.
+- The SHA-256 checksum ensures integrity.
+- The `POST /indexes/movies/documents` command uses this asset as the request body.
+
+This makes the test much cleaner than inlining a large dataset directly into the command.
+
+For asset handling, please refer to the [declarative benchmarks documentation](/BENCHMARKS.md#adding-new-assets).
+
+### Asserting responses
+
+Commands can specify both the **expected status code** and the **expected response body**.
+
+```jsonc
+{
+  "route": "indexes/movies/documents",
+  "method": "POST",
+  "body": {
+    "asset": "movies.json"
+  },
+  "expectedStatus": 202,
+  "expectedResponse": {
+    "enqueuedAt": "[timestamp]", // Set to a bracketed string to ignore the value
+    "indexUid": "movies",
+    "status": "enqueued",
+    "taskUid": 1,
+    "type": "documentAdditionOrUpdate"
+  },
+  "synchronous": "WaitForTask"
+}
+```
+
+Manually writing `expectedResponse` fields can be tedious.
+
+Instead, you can let the test runner populate them automatically:
+
+```bash
+# Run the workload to populate expected fields. Only adds the missing ones, doesn't change existing data
+cargo xtask test workloads/tests/example.json --add-missing-responses
+
+# OR
+
+# Run the workload to populate expected fields. Updates all fields including existing ones
+cargo xtask test workloads/tests/example.json --update-responses
+```
+
+This workflow is recommended:
+
+1. Write the test without expected fields.
+2. Run it with `--add-missing-responses` to capture the actual responses.
+3. Review and commit the generated expectations.
+
+## Changing binary
+
+It is possible to insert an instruction to change the current Meilisearch instance from one binary specification to another during a test.
+
+When executed, such an instruction will:
+1. Stop the current Meilisearch instance.
+2. Fetch the binary specified by the instruction.
+3. Restart the server with the specified binary on the same database.
+
+```jsonc
+{
+  "type": "test",
+  "name": "movies",
+  "binary": {
+    "source": "release",
+    "version": "1.19.0", // start with version v1.19.0
+    "edition": "community"
+  },
+  "assets": {
+    "movies.json": {
+      "local_location": null,
+      "remote_location": "https://milli-benchmarks.fra1.digitaloceanspaces.com/bench/datasets/movies.json",
+      "sha256": "5b6e4cb660bc20327776e8a33ea197b43d9ec84856710ead1cc87ab24df77de1"
+    }
+  },
+  "commands": [
+    // setup some data
+    {
+      "route": "indexes/movies/documents",
+      "method": "POST",
+      "body": {
+        "asset": "movies.json"
+      }
+    },
+    // switch binary to v1.24.0
+    {
+      "binary": {
+        "source": "release",
+        "version": "1.24.0",
+        "edition": "community"
+      }
+    }
+  ]
+}
+```
+
+### Typical Usage
+
+In most cases, the change binary instruction will be used to update a database.
+
+- **Set up** some data using commands on an older version.
+- **Upgrade** to the latest version.
+- **Assert** that the data and API behavior remain correct after the upgrade.
+
+To properly test the dumpless upgrade, one should typically:
+
+1. Open the database without processing the update task: Use a `binary` instruction to switch to the desired version, passing `--experimental-dumpless-upgrade` and `--experimental-max-number-of-batched-tasks=0` as extra CLI arguments
+2. Check that the search, stats and task queue still work.
+3. Open the database and process the update task: Use a `binary` instruction to switch to the desired version, passing `--experimental-dumpless-upgrade` as the extra CLI argument. Use a `health` command to wait for the upgrade task to finish.
+4. Check that the indexing, search, stats, and task queue still work.
+
+```jsonc
+{
+  "type": "test",
+  "name": "movies",
+  "binary": {
+    "source": "release",
+    "version": "1.12.0",
+    "edition": "community"
+  },
+  "commands": [
+    // 0. Run commands to populate the database
+    {
+      // ..
+    },
+    // 1. Open the database with new MS without processing the update task
+    {
+      "binary": {
+        "source": "build", // build the binary from the sources in the current git repository
+        "edition": "community",
+        "extraCliArgs": [
+          "--experimental-dumpless-upgrade", // allows to open with a newer MS
+          "--experimental-max-number-of-batched-tasks=0" // prevent processing of the update task
+        ]
+      }
+    },
+    // 2. Check the search etc.
+    {
+      // ..
+    },
+    // 3. Open the database with new MS and processing the update task
+    {
+      "binary": {
+        "source": "build", // build the binary from the sources in the current git repository
+        "edition": "community",
+        "extraCliArgs": [
+          "--experimental-dumpless-upgrade" // allows to open with a newer MS
+          // no `--experimental-max-number-of-batched-tasks=0`
+        ]
+      }
+    },
+    // 4. Check the indexing, search, etc.
+    {
+      // ..
+    }
+  ]
+}
+```
+
+This ensures backward compatibility: databases created with older Meilisearch versions should remain functional and consistent after an upgrade.
+
+## Variables
+
+Sometimes a command needs to use a value returned by a **previous response**.
+These values can be captured and reused using the register field.
+
+```jsonc
+{
+  "route": "keys",
+  "method": "POST",
+  "body": {
+    "inline": {
+        "actions": [
+        "search",
+        "documents.add"
+        ],
+        "description": "Test API Key",
+        "expiresAt": null,
+        "indexes": [ "movies" ]
+    }
+  },
+  "expectedResponse": {
+      "key": "c6f64630bad2996b1f675007c8800168e14adf5d6a7bb1a400a6d2b158050eaf",
+      // ...
+  },
+  "register": {
+    "key": "/key"
+  },
+  "synchronous": "WaitForResponse"
+}
+```
+
+The `register` field captures the value at the JSON path `/key` from the response.
+Paths follow the **JavaScript Object Notation Pointer (RFC 6901)** format.
+Registered variables are available for all subsequent commands.
+
+Registered variables can be referenced by wrapping their name in double curly braces:
+
+In the route/path:
+
+```jsonc
+{
+  "route": "tasks/{{ task_id }}",
+  "method": "GET"
+}
+```
+
+In the request body:
+
+```jsonc
+{
+  "route": "indexes/movies/documents",
+  "method": "PATCH",
+  "body": {
+    "inline": {
+      "id": "{{ document_id }}",
+      "overview": "Shazam turns evil and the world is in danger.",
+    }
+  }
+}
+```
+
+Or they can be referenced by their name (**without curly braces**) as an API key:
+
+```jsonc
+{
+  "route": "indexes/movies/documents",
+  "method": "POST",
+  "body": { /* ... */ },
+  "apiKeyVariable": "key" // The **content** of the key variable will be used as an API key
+}
+```

crates/benchmarks/benches/indexing.rs

@@ -21,6 +21,10 @@ use roaring::RoaringBitmap;
 #[global_allocator]
 static ALLOC: mimalloc::MiMalloc = mimalloc::MiMalloc;
 
+fn no_cancel() -> bool {
+    false
+}
+
 const BENCHMARK_ITERATION: usize = 10;
 
 fn setup_dir(path: impl AsRef<Path>) {
@@ -65,7 +69,7 @@ fn setup_settings<'t>(
     let sortable_fields = sortable_fields.iter().map(|s| s.to_string()).collect();
     builder.set_sortable_fields(sortable_fields);
 
-    builder.execute(&|| false, &Progress::default(), Default::default()).unwrap();
+    builder.execute(&no_cancel, &Progress::default(), Default::default()).unwrap();
 }
 
 fn setup_index_with_settings(
@@ -152,7 +156,7 @@ fn indexing_songs_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -168,7 +172,7 @@ fn indexing_songs_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -220,7 +224,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -236,7 +240,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -266,7 +270,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -282,7 +286,7 @@ fn reindexing_songs_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -336,7 +340,7 @@ fn deleting_songs_in_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -352,7 +356,7 @@ fn deleting_songs_in_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -414,7 +418,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -430,7 +434,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -460,7 +464,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -476,7 +480,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -502,7 +506,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -518,7 +522,7 @@ fn indexing_songs_in_three_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -571,7 +575,7 @@ fn indexing_songs_without_faceted_numbers(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -587,7 +591,7 @@ fn indexing_songs_without_faceted_numbers(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -639,7 +643,7 @@ fn indexing_songs_without_faceted_fields(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -655,7 +659,7 @@ fn indexing_songs_without_faceted_fields(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -707,7 +711,7 @@ fn indexing_wiki(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -723,7 +727,7 @@ fn indexing_wiki(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -774,7 +778,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -790,7 +794,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -820,7 +824,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -836,7 +840,7 @@ fn reindexing_wiki(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -889,7 +893,7 @@ fn deleting_wiki_in_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -905,7 +909,7 @@ fn deleting_wiki_in_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -967,7 +971,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -983,7 +987,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1014,7 +1018,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1030,7 +1034,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1057,7 +1061,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1073,7 +1077,7 @@ fn indexing_wiki_in_three_batches(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1125,7 +1129,7 @@ fn indexing_movies_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1141,7 +1145,7 @@ fn indexing_movies_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1192,7 +1196,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1208,7 +1212,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1238,7 +1242,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1254,7 +1258,7 @@ fn reindexing_movies_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1307,7 +1311,7 @@ fn deleting_movies_in_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1323,7 +1327,7 @@ fn deleting_movies_in_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1372,7 +1376,7 @@ fn delete_documents_from_ids(index: Index, document_ids_to_delete: Vec<RoaringBi
             Some(primary_key),
             &document_changes,
             RuntimeEmbedders::default(),
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -1422,7 +1426,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1438,7 +1442,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1468,7 +1472,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1484,7 +1488,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1510,7 +1514,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1526,7 +1530,7 @@ fn indexing_movies_in_three_batches(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1601,7 +1605,7 @@ fn indexing_nested_movies_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1617,7 +1621,7 @@ fn indexing_nested_movies_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1693,7 +1697,7 @@ fn deleting_nested_movies_in_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1709,7 +1713,7 @@ fn deleting_nested_movies_in_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1777,7 +1781,7 @@ fn indexing_nested_movies_without_faceted_fields(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1793,7 +1797,7 @@ fn indexing_nested_movies_without_faceted_fields(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1845,7 +1849,7 @@ fn indexing_geo(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1861,7 +1865,7 @@ fn indexing_geo(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1912,7 +1916,7 @@ fn reindexing_geo(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1928,7 +1932,7 @@ fn reindexing_geo(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -1958,7 +1962,7 @@ fn reindexing_geo(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -1974,7 +1978,7 @@ fn reindexing_geo(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )
@@ -2027,7 +2031,7 @@ fn deleting_geo_in_batches_default(c: &mut Criterion) {
                         &rtxn,
                         None,
                         &mut new_fields_ids_map,
-                        &|| false,
+                        &no_cancel,
                         Progress::default(),
                         None,
                     )
@@ -2043,7 +2047,7 @@ fn deleting_geo_in_batches_default(c: &mut Criterion) {
                     primary_key,
                     &document_changes,
                     RuntimeEmbedders::default(),
-                    &|| false,
+                    &no_cancel,
                     &Progress::default(),
                     &Default::default(),
                 )

crates/build-info/Cargo.toml

@@ -15,4 +15,4 @@ time = { version = "0.3.44", features = ["parsing"] }
 
 [build-dependencies]
 anyhow = "1.0.100"
-vergen-git2 = "1.0.7"
+vergen-gitcl = "1.0.8"

crates/build-info/build.rs

@@ -15,7 +15,7 @@ fn emit_git_variables() -> anyhow::Result<()> {
     // Note: any code that needs VERGEN_ environment variables should take care to define them manually in the Dockerfile and pass them
     // in the corresponding GitHub workflow (publish_docker.yml).
     // This is due to the Dockerfile building the binary outside of the git directory.
-    let mut builder = vergen_git2::Git2Builder::default();
+    let mut builder = vergen_gitcl::GitclBuilder::default();
 
     builder.branch(true);
     builder.commit_timestamp(true);
@@ -25,5 +25,5 @@ fn emit_git_variables() -> anyhow::Result<()> {
 
     let git2 = builder.build()?;
 
-    vergen_git2::Emitter::default().fail_on_error().add_instructions(&git2)?.emit()
+    vergen_gitcl::Emitter::default().fail_on_error().add_instructions(&git2)?.emit()
 }

crates/build-info/src/main.rs

@@ -0,0 +1,6 @@
+use build_info::BuildInfo;
+
+fn main() {
+    let info = BuildInfo::from_build();
+    dbg!(info);
+}

crates/dump/src/reader/v2/settings.rs

@@ -107,19 +107,14 @@ impl Settings<Unchecked> {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Default, Debug, Clone, PartialEq)]
 pub enum Setting<T> {
     Set(T),
     Reset,
+    #[default]
     NotSet,
 }
 
-impl<T> Default for Setting<T> {
-    fn default() -> Self {
-        Self::NotSet
-    }
-}
-
 impl<T> Setting<T> {
     pub const fn is_not_set(&self) -> bool {
         matches!(self, Self::NotSet)

crates/dump/src/reader/v3/settings.rs

@@ -161,19 +161,14 @@ pub struct Facets {
     pub min_level_size: Option<NonZeroUsize>,
 }
 
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Default, Debug, Clone, PartialEq, Eq)]
 pub enum Setting<T> {
     Set(T),
     Reset,
+    #[default]
     NotSet,
 }
 
-impl<T> Default for Setting<T> {
-    fn default() -> Self {
-        Self::NotSet
-    }
-}
-
 impl<T> Setting<T> {
     pub fn map<U, F>(self, f: F) -> Setting<U>
     where

crates/dump/src/reader/v4/meta.rs

@@ -1,9 +1,7 @@
 use std::fmt::{self, Display, Formatter};
-use std::marker::PhantomData;
 use std::str::FromStr;
 
-use serde::de::Visitor;
-use serde::{Deserialize, Deserializer};
+use serde::Deserialize;
 use uuid::Uuid;
 
 use super::settings::{Settings, Unchecked};
@@ -82,59 +80,3 @@ impl Display for IndexUidFormatError {
 }
 
 impl std::error::Error for IndexUidFormatError {}
-
-/// A type that tries to match either a star (*) or
-/// any other thing that implements `FromStr`.
-#[derive(Debug)]
-#[cfg_attr(test, derive(serde::Serialize))]
-pub enum StarOr<T> {
-    Star,
-    Other(T),
-}
-
-impl<'de, T, E> Deserialize<'de> for StarOr<T>
-where
-    T: FromStr<Err = E>,
-    E: Display,
-{
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: Deserializer<'de>,
-    {
-        /// Serde can't differentiate between `StarOr::Star` and `StarOr::Other` without a tag.
-        /// Simply using `#[serde(untagged)]` + `#[serde(rename="*")]` will lead to attempting to
-        /// deserialize everything as a `StarOr::Other`, including "*".
-        /// [`#[serde(other)]`](https://serde.rs/variant-attrs.html#other) might have helped but is
-        /// not supported on untagged enums.
-        struct StarOrVisitor<T>(PhantomData<T>);
-
-        impl<T, FE> Visitor<'_> for StarOrVisitor<T>
-        where
-            T: FromStr<Err = FE>,
-            FE: Display,
-        {
-            type Value = StarOr<T>;
-
-            fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
-                formatter.write_str("a string")
-            }
-
-            fn visit_str<SE>(self, v: &str) -> Result<Self::Value, SE>
-            where
-                SE: serde::de::Error,
-            {
-                match v {
-                    "*" => Ok(StarOr::Star),
-                    v => {
-                        let other = FromStr::from_str(v).map_err(|e: T::Err| {
-                            SE::custom(format!("Invalid `other` value: {}", e))
-                        })?;
-                        Ok(StarOr::Other(other))
-                    }
-                }
-            }
-        }
-
-        deserializer.deserialize_str(StarOrVisitor(PhantomData))
-    }
-}

crates/dump/src/reader/v4/settings.rs

@@ -192,19 +192,14 @@ pub struct Facets {
     pub min_level_size: Option<NonZeroUsize>,
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Copy)]
+#[derive(Default, Debug, Clone, PartialEq, Eq, Copy)]
 pub enum Setting<T> {
     Set(T),
     Reset,
+    #[default]
     NotSet,
 }
 
-impl<T> Default for Setting<T> {
-    fn default() -> Self {
-        Self::NotSet
-    }
-}
-
 impl<T> Setting<T> {
     pub fn set(self) -> Option<T> {
         match self {

crates/dump/src/reader/v5/settings.rs

@@ -47,20 +47,15 @@ pub struct Settings<T> {
     pub _kind: PhantomData<T>,
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Copy)]
+#[derive(Default, Debug, Clone, PartialEq, Eq, Copy)]
 #[cfg_attr(test, derive(serde::Serialize))]
 pub enum Setting<T> {
     Set(T),
     Reset,
+    #[default]
     NotSet,
 }
 
-impl<T> Default for Setting<T> {
-    fn default() -> Self {
-        Self::NotSet
-    }
-}
-
 impl<T> Setting<T> {
     pub fn set(self) -> Option<T> {
         match self {

crates/dump/src/reader/v5/tasks.rs

@@ -322,7 +322,7 @@ impl From<Task> for TaskView {
             _ => None,
         });
 
-        let duration = finished_at.zip(started_at).map(|(tf, ts)| (tf - ts));
+        let duration = finished_at.zip(started_at).map(|(tf, ts)| tf - ts);
 
         Self {
             uid: id,

crates/index-scheduler/src/insta_snapshot.rs

@@ -4,9 +4,9 @@ use std::fmt::Write;
 use meilisearch_types::batches::{Batch, BatchEnqueuedAt, BatchStats};
 use meilisearch_types::heed::types::{SerdeBincode, SerdeJson, Str};
 use meilisearch_types::heed::{Database, RoTxn};
-use meilisearch_types::milli::{CboRoaringBitmapCodec, RoaringBitmapCodec, BEU32};
+use meilisearch_types::milli::{DeCboRoaringBitmapCodec, RoaringBitmapCodec, BEU32};
 use meilisearch_types::tasks::{Details, Kind, Status, Task};
-use meilisearch_types::versioning;
+use meilisearch_types::versioning::{self, VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH};
 use roaring::RoaringBitmap;
 
 use crate::index_mapper::IndexMapper;
@@ -187,7 +187,7 @@ pub fn snapshot_all_batches(rtxn: &RoTxn, db: Database<BEU32, SerdeJson<Batch>>)
 
 pub fn snapshot_batches_to_tasks_mappings(
     rtxn: &RoTxn,
-    db: Database<BEU32, CboRoaringBitmapCodec>,
+    db: Database<BEU32, DeCboRoaringBitmapCodec>,
 ) -> String {
     let mut snap = String::new();
     let iter = db.iter(rtxn).unwrap();
@@ -198,7 +198,7 @@ pub fn snapshot_batches_to_tasks_mappings(
     snap
 }
 
-pub fn snapshot_date_db(rtxn: &RoTxn, db: Database<BEI128, CboRoaringBitmapCodec>) -> String {
+pub fn snapshot_date_db(rtxn: &RoTxn, db: Database<BEI128, DeCboRoaringBitmapCodec>) -> String {
     let mut snap = String::new();
     let iter = db.iter(rtxn).unwrap();
     for next in iter {
@@ -320,8 +320,12 @@ fn snapshot_details(d: &Details) -> String {
             format!("{{ url: {url:?}, api_key: {api_key:?}, payload_size: {payload_size:?}, indexes: {indexes:?} }}")
         }
         Details::UpgradeDatabase { from, to } => {
+            if to == &(VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH) {
+                format!("{{ from: {from:?}, to: [current version] }}")
+            } else {
                 format!("{{ from: {from:?}, to: {to:?} }}")
             }
+        }
         Details::IndexCompaction { index_uid, pre_compaction_size, post_compaction_size } => {
             format!("{{ index_uid: {index_uid:?}, pre_compaction_size: {pre_compaction_size:?}, post_compaction_size: {post_compaction_size:?} }}")
         }
@@ -400,7 +404,21 @@ pub fn snapshot_batch(batch: &Batch) -> String {
 
     snap.push('{');
     snap.push_str(&format!("uid: {uid}, "));
-    snap.push_str(&format!("details: {}, ", serde_json::to_string(details).unwrap()));
+    let details = if let Some(upgrade_to) = &details.upgrade_to {
+        if upgrade_to.as_str()
+            == format!("v{VERSION_MAJOR}.{VERSION_MINOR}.{VERSION_PATCH}").as_str()
+        {
+            let mut details = details.clone();
+
+            details.upgrade_to = Some("[current version]".into());
+            serde_json::to_string(&details).unwrap()
+        } else {
+            serde_json::to_string(details).unwrap()
+        }
+    } else {
+        serde_json::to_string(details).unwrap()
+    };
+    snap.push_str(&format!("details: {details}, "));
     snap.push_str(&format!("stats: {}, ", serde_json::to_string(&stats).unwrap()));
     if !embedder_stats.skip_serializing() {
         snap.push_str(&format!(

crates/index-scheduler/src/queue/batches.rs

@@ -4,7 +4,7 @@ use std::ops::{Bound, RangeBounds};
 use meilisearch_types::batches::{Batch, BatchId};
 use meilisearch_types::heed::types::{DecodeIgnore, SerdeBincode, SerdeJson, Str};
 use meilisearch_types::heed::{Database, Env, RoTxn, RwTxn, WithoutTls};
-use meilisearch_types::milli::{CboRoaringBitmapCodec, RoaringBitmapCodec, BEU32};
+use meilisearch_types::milli::{DeCboRoaringBitmapCodec, RoaringBitmapCodec, BEU32};
 use meilisearch_types::tasks::{Kind, Status};
 use roaring::{MultiOps, RoaringBitmap};
 use time::OffsetDateTime;
@@ -42,11 +42,11 @@ pub struct BatchQueue {
     /// Store the batches associated to an index.
     pub(crate) index_tasks: Database<Str, RoaringBitmapCodec>,
     /// Store the batches containing tasks which were enqueued at a specific date
-    pub(crate) enqueued_at: Database<BEI128, CboRoaringBitmapCodec>,
+    pub(crate) enqueued_at: Database<BEI128, DeCboRoaringBitmapCodec>,
     /// Store the batches containing finished tasks started at a specific date
-    pub(crate) started_at: Database<BEI128, CboRoaringBitmapCodec>,
+    pub(crate) started_at: Database<BEI128, DeCboRoaringBitmapCodec>,
     /// Store the batches containing tasks finished at a specific date
-    pub(crate) finished_at: Database<BEI128, CboRoaringBitmapCodec>,
+    pub(crate) finished_at: Database<BEI128, DeCboRoaringBitmapCodec>,
 }
 
 impl BatchQueue {

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

@@ -14,7 +14,7 @@ use std::time::Duration;
 use file_store::FileStore;
 use meilisearch_types::batches::BatchId;
 use meilisearch_types::heed::{Database, Env, RoTxn, RwTxn, WithoutTls};
-use meilisearch_types::milli::{CboRoaringBitmapCodec, BEU32};
+use meilisearch_types::milli::{DeCboRoaringBitmapCodec, BEU32};
 use meilisearch_types::tasks::{Kind, KindWithContent, Status, Task};
 use roaring::RoaringBitmap;
 use time::format_description::well_known::Rfc3339;
@@ -130,7 +130,7 @@ pub struct Queue {
     pub(crate) batches: batches::BatchQueue,
 
     /// Matches a batch id with the associated task ids.
-    pub(crate) batch_to_tasks_mapping: Database<BEU32, CboRoaringBitmapCodec>,
+    pub(crate) batch_to_tasks_mapping: Database<BEU32, DeCboRoaringBitmapCodec>,
 
     /// The list of files referenced by the tasks.
     pub(crate) file_store: FileStore,

crates/index-scheduler/src/queue/tasks.rs

@@ -2,7 +2,7 @@ use std::ops::{Bound, RangeBounds};
 
 use meilisearch_types::heed::types::{DecodeIgnore, SerdeBincode, SerdeJson, Str};
 use meilisearch_types::heed::{Database, Env, RoTxn, RwTxn, WithoutTls};
-use meilisearch_types::milli::{CboRoaringBitmapCodec, RoaringBitmapCodec, BEU32};
+use meilisearch_types::milli::{DeCboRoaringBitmapCodec, RoaringBitmapCodec, BEU32};
 use meilisearch_types::tasks::{Kind, Status, Task};
 use roaring::{MultiOps, RoaringBitmap};
 use time::OffsetDateTime;
@@ -43,11 +43,11 @@ pub struct TaskQueue {
     /// Store the tasks that were canceled by a task uid
     pub(crate) canceled_by: Database<BEU32, RoaringBitmapCodec>,
     /// Store the task ids of tasks which were enqueued at a specific date
-    pub(crate) enqueued_at: Database<BEI128, CboRoaringBitmapCodec>,
+    pub(crate) enqueued_at: Database<BEI128, DeCboRoaringBitmapCodec>,
     /// Store the task ids of finished tasks which started being processed at a specific date
-    pub(crate) started_at: Database<BEI128, CboRoaringBitmapCodec>,
+    pub(crate) started_at: Database<BEI128, DeCboRoaringBitmapCodec>,
     /// Store the task ids of tasks which finished at a specific date
-    pub(crate) finished_at: Database<BEI128, CboRoaringBitmapCodec>,
+    pub(crate) finished_at: Database<BEI128, DeCboRoaringBitmapCodec>,
 }
 
 impl TaskQueue {

crates/index-scheduler/src/scheduler/snapshots/test_failure.rs/upgrade_failure/after_processing_everything.snap

@@ -6,7 +6,7 @@ source: crates/index-scheduler/src/scheduler/test_failure.rs
 []
 ----------------------------------------------------------------------
 ### All Tasks:
-0 {uid: 0, batch_uid: 0, status: succeeded, details: { from: (1, 12, 0), to: (1, 28, 2) }, kind: UpgradeDatabase { from: (1, 12, 0) }}
+0 {uid: 0, batch_uid: 0, status: succeeded, details: { from: (1, 12, 0), to: [current version] }, kind: UpgradeDatabase { from: (1, 12, 0) }}
 1 {uid: 1, batch_uid: 1, status: succeeded, details: { primary_key: Some("mouse"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}
 2 {uid: 2, batch_uid: 2, status: succeeded, details: { primary_key: Some("bone"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "doggo", primary_key: Some("bone") }}
 3 {uid: 3, batch_uid: 3, status: failed, error: ResponseError { code: 200, message: "Index `doggo` already exists.", error_code: "index_already_exists", error_type: "invalid_request", error_link: "https://docs.meilisearch.com/errors#index_already_exists" }, details: { primary_key: Some("bone"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "doggo", primary_key: Some("bone") }}
@@ -57,7 +57,7 @@ girafo: { number_of_documents: 0, field_distribution: {} }
 [timestamp] [4,]
 ----------------------------------------------------------------------
 ### All Batches:
-0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"v1.28.2"}, stats: {"totalNbTasks":1,"status":{"succeeded":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
+0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"[current version]"}, stats: {"totalNbTasks":1,"status":{"succeeded":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
 1 {uid: 1, details: {"primaryKey":"mouse"}, stats: {"totalNbTasks":1,"status":{"succeeded":1},"types":{"indexCreation":1},"indexUids":{"catto":1}}, stop reason: "created batch containing only task with id 1 of type `indexCreation` that cannot be batched with any other task.", }
 2 {uid: 2, details: {"primaryKey":"bone"}, stats: {"totalNbTasks":1,"status":{"succeeded":1},"types":{"indexCreation":1},"indexUids":{"doggo":1}}, stop reason: "created batch containing only task with id 2 of type `indexCreation` that cannot be batched with any other task.", }
 3 {uid: 3, details: {"primaryKey":"bone"}, stats: {"totalNbTasks":1,"status":{"failed":1},"types":{"indexCreation":1},"indexUids":{"doggo":1}}, stop reason: "created batch containing only task with id 3 of type `indexCreation` that cannot be batched with any other task.", }

crates/index-scheduler/src/scheduler/snapshots/test_failure.rs/upgrade_failure/register_automatic_upgrade_task.snap

@@ -6,7 +6,7 @@ source: crates/index-scheduler/src/scheduler/test_failure.rs
 []
 ----------------------------------------------------------------------
 ### All Tasks:
-0 {uid: 0, status: enqueued, details: { from: (1, 12, 0), to: (1, 28, 2) }, kind: UpgradeDatabase { from: (1, 12, 0) }}
+0 {uid: 0, status: enqueued, details: { from: (1, 12, 0), to: [current version] }, kind: UpgradeDatabase { from: (1, 12, 0) }}
 ----------------------------------------------------------------------
 ### Status:
 enqueued [0,]

crates/index-scheduler/src/scheduler/snapshots/test_failure.rs/upgrade_failure/registered_a_task_while_the_upgrade_task_is_enqueued.snap

@@ -6,7 +6,7 @@ source: crates/index-scheduler/src/scheduler/test_failure.rs
 []
 ----------------------------------------------------------------------
 ### All Tasks:
-0 {uid: 0, status: enqueued, details: { from: (1, 12, 0), to: (1, 28, 2) }, kind: UpgradeDatabase { from: (1, 12, 0) }}
+0 {uid: 0, status: enqueued, details: { from: (1, 12, 0), to: [current version] }, kind: UpgradeDatabase { from: (1, 12, 0) }}
 1 {uid: 1, status: enqueued, details: { primary_key: Some("mouse"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}
 ----------------------------------------------------------------------
 ### Status:

crates/index-scheduler/src/scheduler/snapshots/test_failure.rs/upgrade_failure/upgrade_task_failed.snap

@@ -6,7 +6,7 @@ source: crates/index-scheduler/src/scheduler/test_failure.rs
 []
 ----------------------------------------------------------------------
 ### All Tasks:
-0 {uid: 0, batch_uid: 0, status: failed, error: ResponseError { code: 200, message: "Planned failure for tests.", error_code: "internal", error_type: "internal", error_link: "https://docs.meilisearch.com/errors#internal" }, details: { from: (1, 12, 0), to: (1, 28, 2) }, kind: UpgradeDatabase { from: (1, 12, 0) }}
+0 {uid: 0, batch_uid: 0, status: failed, error: ResponseError { code: 200, message: "Planned failure for tests.", error_code: "internal", error_type: "internal", error_link: "https://docs.meilisearch.com/errors#internal" }, details: { from: (1, 12, 0), to: [current version] }, kind: UpgradeDatabase { from: (1, 12, 0) }}
 1 {uid: 1, status: enqueued, details: { primary_key: Some("mouse"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}
 ----------------------------------------------------------------------
 ### Status:
@@ -37,7 +37,7 @@ catto [1,]
 [timestamp] [0,]
 ----------------------------------------------------------------------
 ### All Batches:
-0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"v1.28.2"}, stats: {"totalNbTasks":1,"status":{"failed":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
+0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"[current version]"}, stats: {"totalNbTasks":1,"status":{"failed":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
 ----------------------------------------------------------------------
 ### Batch to tasks mapping:
 0 [0,]

crates/index-scheduler/src/scheduler/snapshots/test_failure.rs/upgrade_failure/upgrade_task_failed_again.snap

@@ -6,7 +6,7 @@ source: crates/index-scheduler/src/scheduler/test_failure.rs
 []
 ----------------------------------------------------------------------
 ### All Tasks:
-0 {uid: 0, batch_uid: 0, status: failed, error: ResponseError { code: 200, message: "Planned failure for tests.", error_code: "internal", error_type: "internal", error_link: "https://docs.meilisearch.com/errors#internal" }, details: { from: (1, 12, 0), to: (1, 28, 2) }, kind: UpgradeDatabase { from: (1, 12, 0) }}
+0 {uid: 0, batch_uid: 0, status: failed, error: ResponseError { code: 200, message: "Planned failure for tests.", error_code: "internal", error_type: "internal", error_link: "https://docs.meilisearch.com/errors#internal" }, details: { from: (1, 12, 0), to: [current version] }, kind: UpgradeDatabase { from: (1, 12, 0) }}
 1 {uid: 1, status: enqueued, details: { primary_key: Some("mouse"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}
 2 {uid: 2, status: enqueued, details: { primary_key: Some("bone"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "doggo", primary_key: Some("bone") }}
 ----------------------------------------------------------------------
@@ -40,7 +40,7 @@ doggo [2,]
 [timestamp] [0,]
 ----------------------------------------------------------------------
 ### All Batches:
-0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"v1.28.2"}, stats: {"totalNbTasks":1,"status":{"failed":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
+0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"[current version]"}, stats: {"totalNbTasks":1,"status":{"failed":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
 ----------------------------------------------------------------------
 ### Batch to tasks mapping:
 0 [0,]

crates/index-scheduler/src/scheduler/snapshots/test_failure.rs/upgrade_failure/upgrade_task_succeeded.snap

@@ -6,7 +6,7 @@ source: crates/index-scheduler/src/scheduler/test_failure.rs
 []
 ----------------------------------------------------------------------
 ### All Tasks:
-0 {uid: 0, batch_uid: 0, status: succeeded, details: { from: (1, 12, 0), to: (1, 28, 2) }, kind: UpgradeDatabase { from: (1, 12, 0) }}
+0 {uid: 0, batch_uid: 0, status: succeeded, details: { from: (1, 12, 0), to: [current version] }, kind: UpgradeDatabase { from: (1, 12, 0) }}
 1 {uid: 1, status: enqueued, details: { primary_key: Some("mouse"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "catto", primary_key: Some("mouse") }}
 2 {uid: 2, status: enqueued, details: { primary_key: Some("bone"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "doggo", primary_key: Some("bone") }}
 3 {uid: 3, status: enqueued, details: { primary_key: Some("bone"), old_new_uid: None, new_index_uid: None }, kind: IndexCreation { index_uid: "doggo", primary_key: Some("bone") }}
@@ -43,7 +43,7 @@ doggo [2,3,]
 [timestamp] [0,]
 ----------------------------------------------------------------------
 ### All Batches:
-0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"v1.28.2"}, stats: {"totalNbTasks":1,"status":{"succeeded":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
+0 {uid: 0, details: {"upgradeFrom":"v1.12.0","upgradeTo":"[current version]"}, stats: {"totalNbTasks":1,"status":{"succeeded":1},"types":{"upgradeDatabase":1},"indexUids":{}}, stop reason: "stopped after the last task of type `upgradeDatabase` because they cannot be batched with tasks of any other type.", }
 ----------------------------------------------------------------------
 ### Batch to tasks mapping:
 0 [0,]

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

@@ -1,7 +1,7 @@
 use anyhow::bail;
 use meilisearch_types::heed::{Env, RwTxn, WithoutTls};
 use meilisearch_types::tasks::{Details, KindWithContent, Status, Task};
-use meilisearch_types::versioning::{VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH};
+use meilisearch_types::versioning;
 use time::OffsetDateTime;
 use tracing::info;
 
@@ -9,83 +9,82 @@ use crate::queue::TaskQueue;
 use crate::versioning::Versioning;
 
 trait UpgradeIndexScheduler {
-    fn upgrade(
-        &self,
-        env: &Env<WithoutTls>,
-        wtxn: &mut RwTxn,
-        original: (u32, u32, u32),
-    ) -> anyhow::Result<()>;
-    fn target_version(&self) -> (u32, u32, u32);
+    fn upgrade(&self, env: &Env<WithoutTls>, wtxn: &mut RwTxn) -> anyhow::Result<()>;
+    /// Whether the migration should be applied, depending on the initial version of the index scheduler before
+    /// any migration was applied
+    fn must_upgrade(&self, initial_version: (u32, u32, u32)) -> bool;
+    /// A progress-centric description of the migration
+    fn description(&self) -> &'static str;
 }
 
+/// Upgrade the index scheduler to the binary version.
+///
+/// # Warning
+///
+/// The current implementation uses a single wtxn to the index scheduler for the whole duration of the upgrade.
+/// If migrations start taking take a long time, it might prevent tasks from being registered.
+/// If this issue manifests, then it can be mitigated by adding a `fn target_version` to `UpgradeIndexScheduler`,
+/// to be able to write intermediate versions and drop the wtxn between applying migrations.
 pub fn upgrade_index_scheduler(
     env: &Env<WithoutTls>,
     versioning: &Versioning,
-    from: (u32, u32, u32),
-    to: (u32, u32, u32),
+    initial_version: (u32, u32, u32),
 ) -> anyhow::Result<()> {
-    let current_major = to.0;
-    let current_minor = to.1;
-    let current_patch = to.2;
+    let target_major: u32 = versioning::VERSION_MAJOR;
+    let target_minor: u32 = versioning::VERSION_MINOR;
+    let target_patch: u32 = versioning::VERSION_PATCH;
+    let target_version = (target_major, target_minor, target_patch);
+
+    if initial_version == target_version {
+        return Ok(());
+    }
 
     let upgrade_functions: &[&dyn UpgradeIndexScheduler] = &[
-        // This is the last upgrade function, it will be called when the index is up to date.
-        // any other upgrade function should be added before this one.
-        &ToCurrentNoOp {},
+        // List all upgrade functions to apply in order here.
     ];
 
-    let start = match from {
-        (1, 12, _) => 0,
-        (1, 13, _) => 0,
-        (1, 14, _) => 0,
-        (1, 15, _) => 0,
-        (1, 16, _) => 0,
-        (1, 17, _) => 0,
-        (1, 18, _) => 0,
-        (1, 19, _) => 0,
-        (1, 20, _) => 0,
-        (1, 21, _) => 0,
-        (1, 22, _) => 0,
-        (1, 23, _) => 0,
-        (1, 24, _) => 0,
-        (1, 25, _) => 0,
-        (1, 26, _) => 0,
-        (1, 27, _) => 0,
-        (1, 28, _) => 0,
-        (major, minor, patch) => {
-            if major > current_major
-                || (major == current_major && minor > current_minor)
-                || (major == current_major && minor == current_minor && patch > current_patch)
-            {
+    let (initial_major, initial_minor, initial_patch) = initial_version;
+
+    if initial_version > target_version {
         bail!(
-                "Database version {major}.{minor}.{patch} is higher than the Meilisearch version {current_major}.{current_minor}.{current_patch}. Downgrade is not supported",
+                "Database version {initial_major}.{initial_minor}.{initial_patch} is higher than the Meilisearch version {target_major}.{target_minor}.{target_patch}. Downgrade is not supported",
             );
-            } else if major < 1 || (major == current_major && minor < 12) {
+    }
+
+    if initial_version < (1, 12, 0) {
         bail!(
-                "Database version {major}.{minor}.{patch} is too old for the experimental dumpless upgrade feature. Please generate a dump using the v{major}.{minor}.{patch} and import it in the v{current_major}.{current_minor}.{current_patch}",
+                "Database version {initial_major}.{initial_minor}.{initial_patch} is too old for the experimental dumpless upgrade feature. Please generate a dump using the v{initial_major}.{initial_minor}.{initial_patch} and import it in the v{target_major}.{target_minor}.{target_patch}",
             );
-            } else {
-                bail!("Unknown database version: v{major}.{minor}.{patch}");
     }
-        }
-    };
 
     info!("Upgrading the task queue");
-    let mut local_from = from;
-    for upgrade in upgrade_functions[start..].iter() {
-        let target = upgrade.target_version();
-        info!(
-            "Upgrading from v{}.{}.{} to v{}.{}.{}",
-            local_from.0, local_from.1, local_from.2, target.0, target.1, target.2
-        );
     let mut wtxn = env.write_txn()?;
-        upgrade.upgrade(env, &mut wtxn, local_from)?;
-        versioning.set_version(&mut wtxn, target)?;
-        wtxn.commit()?;
-        local_from = target;
+    let migration_count = upgrade_functions.len();
+    for (migration_index, upgrade) in upgrade_functions.iter().enumerate() {
+        if upgrade.must_upgrade(initial_version) {
+            info!(
+                "[{migration_index}/{migration_count}]Applying migration: {}",
+                upgrade.description()
+            );
+
+            upgrade.upgrade(env, &mut wtxn)?;
+
+            info!(
+                "[{}/{migration_count}]Migration applied: {}",
+                migration_index + 1,
+                upgrade.description()
+            )
+        } else {
+            info!(
+                "[{migration_index}/{migration_count}]Skipping unnecessary migration: {}",
+                upgrade.description()
+            )
+        }
     }
 
-    let mut wtxn = env.write_txn()?;
+    versioning.set_version(&mut wtxn, target_version)?;
+    info!("Task queue upgraded, spawning the upgrade database task");
+
     let queue = TaskQueue::new(env, &mut wtxn)?;
     let uid = queue.next_task_id(&wtxn)?;
     queue.register(
@@ -98,9 +97,9 @@ pub fn upgrade_index_scheduler(
             finished_at: None,
             error: None,
             canceled_by: None,
-            details: Some(Details::UpgradeDatabase { from, to }),
+            details: Some(Details::UpgradeDatabase { from: initial_version, to: target_version }),
             status: Status::Enqueued,
-            kind: KindWithContent::UpgradeDatabase { from },
+            kind: KindWithContent::UpgradeDatabase { from: initial_version },
             network: None,
             custom_metadata: None,
         },
@@ -109,21 +108,3 @@ pub fn upgrade_index_scheduler(
 
     Ok(())
 }
-
-#[allow(non_camel_case_types)]
-struct ToCurrentNoOp {}
-
-impl UpgradeIndexScheduler for ToCurrentNoOp {
-    fn upgrade(
-        &self,
-        _env: &Env<WithoutTls>,
-        _wtxn: &mut RwTxn,
-        _original: (u32, u32, u32),
-    ) -> anyhow::Result<()> {
-        Ok(())
-    }
-
-    fn target_version(&self) -> (u32, u32, u32) {
-        (VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH)
-    }
-}

crates/index-scheduler/src/utils.rs

@@ -6,7 +6,7 @@ use std::sync::Arc;
 
 use meilisearch_types::batches::{Batch, BatchEnqueuedAt, BatchId, BatchStats};
 use meilisearch_types::heed::{Database, RoTxn, RwTxn};
-use meilisearch_types::milli::CboRoaringBitmapCodec;
+use meilisearch_types::milli::DeCboRoaringBitmapCodec;
 use meilisearch_types::task_view::DetailsView;
 use meilisearch_types::tasks::{
     BatchStopReason, Details, IndexSwap, Kind, KindWithContent, Status,
@@ -161,7 +161,7 @@ impl ProcessingBatch {
 
 pub(crate) fn insert_task_datetime(
     wtxn: &mut RwTxn,
-    database: Database<BEI128, CboRoaringBitmapCodec>,
+    database: Database<BEI128, DeCboRoaringBitmapCodec>,
     time: OffsetDateTime,
     task_id: TaskId,
 ) -> Result<()> {
@@ -174,7 +174,7 @@ pub(crate) fn insert_task_datetime(
 
 pub(crate) fn remove_task_datetime(
     wtxn: &mut RwTxn,
-    database: Database<BEI128, CboRoaringBitmapCodec>,
+    database: Database<BEI128, DeCboRoaringBitmapCodec>,
     time: OffsetDateTime,
     task_id: TaskId,
 ) -> Result<()> {
@@ -193,7 +193,7 @@ pub(crate) fn remove_task_datetime(
 
 pub(crate) fn remove_n_tasks_datetime_earlier_than(
     wtxn: &mut RwTxn,
-    database: Database<BEI128, CboRoaringBitmapCodec>,
+    database: Database<BEI128, DeCboRoaringBitmapCodec>,
     earlier_than: OffsetDateTime,
     mut count: usize,
     task_id: TaskId,
@@ -221,7 +221,7 @@ pub(crate) fn remove_n_tasks_datetime_earlier_than(
 pub(crate) fn keep_ids_within_datetimes(
     rtxn: &RoTxn,
     ids: &mut RoaringBitmap,
-    database: Database<BEI128, CboRoaringBitmapCodec>,
+    database: Database<BEI128, DeCboRoaringBitmapCodec>,
     after: Option<OffsetDateTime>,
     before: Option<OffsetDateTime>,
 ) -> Result<()> {

crates/index-scheduler/src/versioning.rs

@@ -64,14 +64,7 @@ impl Versioning {
         };
         wtxn.commit()?;
 
-        let bin_major: u32 = versioning::VERSION_MAJOR;
-        let bin_minor: u32 = versioning::VERSION_MINOR;
-        let bin_patch: u32 = versioning::VERSION_PATCH;
-        let to = (bin_major, bin_minor, bin_patch);
-
-        if from != to {
-            upgrade_index_scheduler(env, &this, from, to)?;
-        }
+        upgrade_index_scheduler(env, &this, from)?;
 
         // Once we reach this point it means the upgrade process, if there was one is entirely finished
         // we can safely say we reached the latest version of the index scheduler

crates/meilisearch-types/src/network.rs

@@ -1,6 +1,7 @@
-use serde::{Deserialize, Serialize};
 use std::collections::BTreeMap;
 
+use serde::{Deserialize, Serialize};
+
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Default)]
 #[serde(rename_all = "camelCase")]
 pub struct Network {

crates/meilisearch/src/analytics/segment_analytics.rs

@@ -1,7 +1,7 @@
 use std::any::TypeId;
 use std::collections::{HashMap, HashSet};
 use std::fs;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 
@@ -300,6 +300,7 @@ impl Infos {
             max_indexing_memory,
             max_indexing_threads,
             skip_index_budget: _,
+            experimental_disable_delta_encoding: _,
             experimental_no_edition_2024_for_settings,
             experimental_no_edition_2024_for_dumps,
             experimental_no_edition_2024_for_prefix_post_processing,
@@ -344,14 +345,14 @@ impl Infos {
             experimental_no_edition_2024_for_dumps,
             experimental_vector_store_setting: vector_store_setting,
             gpu_enabled: meilisearch_types::milli::vector::is_cuda_enabled(),
-            db_path: db_path != PathBuf::from("./data.ms"),
+            db_path: db_path != Path::new("./data.ms"),
             import_dump: import_dump.is_some(),
-            dump_dir: dump_dir != PathBuf::from("dumps/"),
+            dump_dir: dump_dir != Path::new("dumps/"),
             ignore_missing_dump,
             ignore_dump_if_db_exists,
             import_snapshot: import_snapshot.is_some(),
             schedule_snapshot,
-            snapshot_dir: snapshot_dir != PathBuf::from("snapshots/"),
+            snapshot_dir: snapshot_dir != Path::new("snapshots/"),
             uses_s3_snapshots: s3_snapshot_options.is_some(),
             ignore_missing_snapshot,
             ignore_snapshot_if_db_exists,

crates/meilisearch/src/main.rs

@@ -21,6 +21,7 @@ use meilisearch::{
     LogStderrType, Opt, ServicesData, SubscriberForSecondLayer,
 };
 use meilisearch_auth::{generate_master_key, AuthController, MASTER_KEY_MIN_SIZE};
+use meilisearch_types::milli::heed_codec::DELTA_ENCODING_STATUS;
 use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
 use tracing::level_filters::LevelFilter;
 use tracing_subscriber::layer::SubscriberExt as _;
@@ -95,6 +96,14 @@ async fn main() -> anyhow::Result<()> {
 async fn try_main(runtime: tokio::runtime::Handle) -> anyhow::Result<()> {
     let (opt, config_read_from) = Opt::try_build()?;
 
+    // Disables the delta encoding of bitmaps as soon as possible
+    if opt.indexer_options.experimental_disable_delta_encoding {
+        DELTA_ENCODING_STATUS.set_to_disabled()
+    } else {
+        DELTA_ENCODING_STATUS.set_to_enabled()
+    }
+    .expect("the delta-encoding status to be set only once");
+
     std::panic::set_hook(Box::new(on_panic));
 
     anyhow::ensure!(

crates/meilisearch/src/option.rs

@@ -60,6 +60,7 @@ const MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_FACET_POST_PROCESSING: &str =
     "MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_FACET_POST_PROCESSING";
 const MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_PREFIX_POST_PROCESSING: &str =
     "MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_PREFIX_POST_PROCESSING";
+const MEILI_EXPERIMENTAL_DISABLE_DELTA_ENCODING: &str = "MEILI_EXPERIMENTAL_DISABLE_DELTA_ENCODING";
 const MEILI_EXPERIMENTAL_ENABLE_METRICS: &str = "MEILI_EXPERIMENTAL_ENABLE_METRICS";
 const MEILI_EXPERIMENTAL_SEARCH_QUEUE_SIZE: &str = "MEILI_EXPERIMENTAL_SEARCH_QUEUE_SIZE";
 const MEILI_EXPERIMENTAL_DROP_SEARCH_AFTER: &str = "MEILI_EXPERIMENTAL_DROP_SEARCH_AFTER";
@@ -845,6 +846,14 @@ pub struct IndexerOpts {
     #[clap(long, env = MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_FACET_POST_PROCESSING)]
     #[serde(default)]
     pub experimental_no_edition_2024_for_facet_post_processing: bool,
+
+    /// Experimental disable delta-encoding for bitmaps. For more information,
+    /// see: <https://github.com/orgs/meilisearch/discussions/875>
+    ///
+    /// Enables the experimental disable delta-encoding for bitmaps feature.
+    #[clap(long, env = MEILI_EXPERIMENTAL_DISABLE_DELTA_ENCODING)]
+    #[serde(default)]
+    pub experimental_disable_delta_encoding: bool,
 }
 
 impl IndexerOpts {
@@ -858,6 +867,7 @@ impl IndexerOpts {
             experimental_no_edition_2024_for_dumps,
             experimental_no_edition_2024_for_prefix_post_processing,
             experimental_no_edition_2024_for_facet_post_processing,
+            experimental_disable_delta_encoding,
         } = self;
         if let Some(max_indexing_memory) = max_indexing_memory.0 {
             export_to_env_if_not_present(
@@ -895,6 +905,12 @@ impl IndexerOpts {
                 experimental_no_edition_2024_for_facet_post_processing.to_string(),
             );
         }
+        if experimental_disable_delta_encoding {
+            export_to_env_if_not_present(
+                MEILI_EXPERIMENTAL_DISABLE_DELTA_ENCODING,
+                experimental_disable_delta_encoding.to_string(),
+            );
+        }
     }
 }
 
@@ -910,6 +926,7 @@ impl TryFrom<&IndexerOpts> for IndexerConfig {
             experimental_no_edition_2024_for_dumps,
             experimental_no_edition_2024_for_prefix_post_processing,
             experimental_no_edition_2024_for_facet_post_processing,
+            experimental_disable_delta_encoding: _, // managed in try_main
         } = other;
 
         let thread_pool = ThreadPoolNoAbortBuilder::new_for_indexing()
@@ -1245,7 +1262,7 @@ where
     T: AsRef<OsStr>,
 {
     if let Err(VarError::NotPresent) = std::env::var(key) {
-        std::env::set_var(key, value);
+        unsafe { std::env::set_var(key, value) }
     }
 }
 

crates/meilisearch/src/search/mod.rs

@@ -789,11 +789,12 @@ impl TryFrom<Value> for ExternalDocumentId {
     }
 }
 
-#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserr, ToSchema, Serialize)]
+#[derive(Default, Debug, Copy, Clone, PartialEq, Eq, Deserr, ToSchema, Serialize)]
 #[deserr(rename_all = camelCase)]
 #[serde(rename_all = "camelCase")]
 pub enum MatchingStrategy {
     /// Remove query words from last to first
+    #[default]
     Last,
     /// All query words are mandatory
     All,
@@ -801,12 +802,6 @@ pub enum MatchingStrategy {
     Frequency,
 }
 
-impl Default for MatchingStrategy {
-    fn default() -> Self {
-        Self::Last
-    }
-}
-
 impl From<MatchingStrategy> for TermsMatchingStrategy {
     fn from(other: MatchingStrategy) -> Self {
         match other {

crates/meilisearch/tests/auth/tenant_token.rs

@@ -187,7 +187,7 @@ macro_rules! compute_forbidden_search {
 
 #[actix_rt::test]
 async fn search_authorized_simple_token() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -239,7 +239,7 @@ async fn search_authorized_simple_token() {
 
 #[actix_rt::test]
 async fn search_authorized_filter_token() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {"filter": "color = blue"}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -292,7 +292,7 @@ async fn search_authorized_filter_token() {
 
 #[actix_rt::test]
 async fn filter_search_authorized_filter_token() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {"filter": "color = blue"}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -353,7 +353,7 @@ async fn filter_search_authorized_filter_token() {
 /// Tests that those Tenant Token are incompatible with the REFUSED_KEYS defined above.
 #[actix_rt::test]
 async fn error_search_token_forbidden_parent_key() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -389,7 +389,7 @@ async fn error_search_token_forbidden_parent_key() {
 
 #[actix_rt::test]
 async fn error_search_forbidden_token() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         // bad index
         hashmap! {
             "searchRules" => json!({"products": {}}),

crates/meilisearch/tests/auth/tenant_token_multi_search.rs

@@ -680,7 +680,7 @@ async fn multi_search_authorized_simple_token() {
 
 #[actix_rt::test]
 async fn single_search_authorized_filter_token() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {"filter": "color = blue"}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -733,7 +733,7 @@ async fn single_search_authorized_filter_token() {
 
 #[actix_rt::test]
 async fn multi_search_authorized_filter_token() {
-    let both_tenant_tokens = vec![
+    let both_tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"sales": {"filter": "color = blue"}, "products": {"filter": "doggos.age <= 5"}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -842,7 +842,7 @@ async fn filter_single_search_authorized_filter_token() {
 
 #[actix_rt::test]
 async fn filter_multi_search_authorized_filter_token() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"sales": {"filter": "color = blue"}, "products": {"filter": "doggos.age <= 5"}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -900,7 +900,7 @@ async fn filter_multi_search_authorized_filter_token() {
 /// Tests that those Tenant Token are incompatible with the REFUSED_KEYS defined above.
 #[actix_rt::test]
 async fn error_single_search_token_forbidden_parent_key() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())
@@ -941,7 +941,7 @@ async fn error_single_search_token_forbidden_parent_key() {
 /// Tests that those Tenant Token are incompatible with the REFUSED_KEYS defined above.
 #[actix_rt::test]
 async fn error_multi_search_token_forbidden_parent_key() {
-    let tenant_tokens = vec![
+    let tenant_tokens = [
         hashmap! {
             "searchRules" => json!({"*": {}}),
             "exp" => json!((OffsetDateTime::now_utc() + Duration::hours(1)).unix_timestamp())

crates/meilisearch/tests/common/server.rs

@@ -43,9 +43,9 @@ impl Server<Owned> {
         let dir = TempDir::new().unwrap();
 
         if cfg!(windows) {
-            std::env::set_var("TMP", TEST_TEMP_DIR.path());
+            unsafe { std::env::set_var("TMP", TEST_TEMP_DIR.path()) }
         } else {
-            std::env::set_var("TMPDIR", TEST_TEMP_DIR.path());
+            unsafe { std::env::set_var("TMPDIR", TEST_TEMP_DIR.path()) }
         }
 
         let options = default_settings(dir.path());
@@ -58,9 +58,9 @@ impl Server<Owned> {
 
     pub async fn new_auth_with_options(mut options: Opt, dir: TempDir) -> Self {
         if cfg!(windows) {
-            std::env::set_var("TMP", TEST_TEMP_DIR.path());
+            unsafe { std::env::set_var("TMP", TEST_TEMP_DIR.path()) }
         } else {
-            std::env::set_var("TMPDIR", TEST_TEMP_DIR.path());
+            unsafe { std::env::set_var("TMPDIR", TEST_TEMP_DIR.path()) }
         }
 
         options.master_key = Some("MASTER_KEY".to_string());
@@ -215,9 +215,9 @@ impl Server<Shared> {
         let dir = TempDir::new().unwrap();
 
         if cfg!(windows) {
-            std::env::set_var("TMP", TEST_TEMP_DIR.path());
+            unsafe { std::env::set_var("TMP", TEST_TEMP_DIR.path()) }
         } else {
-            std::env::set_var("TMPDIR", TEST_TEMP_DIR.path());
+            unsafe { std::env::set_var("TMPDIR", TEST_TEMP_DIR.path()) }
         }
 
         let options = default_settings(dir.path());
@@ -508,6 +508,8 @@ pub fn default_settings(dir: impl AsRef<Path>) -> Opt {
             experimental_no_edition_2024_for_dumps: false,
             experimental_no_edition_2024_for_prefix_post_processing: false,
             experimental_no_edition_2024_for_facet_post_processing: false,
+            // It has no effect to set the delta encoding here as the toggle is done in try_main
+            experimental_disable_delta_encoding: false,
         },
         experimental_enable_metrics: false,
         ..Parser::parse_from(None as Option<&str>)

crates/meilisearch/tests/settings/get_settings.rs

@@ -197,7 +197,7 @@ test_setting_routes!(
     {
       setting: vector_store,
       update_verb: patch,
-      default_value: null
+      default_value: "experimental"
     },
 );
 

crates/meilisearch/tests/upgrade/mod.rs

@@ -42,8 +42,16 @@ async fn version_too_old() {
     std::fs::create_dir_all(&db_path).unwrap();
     std::fs::write(db_path.join("VERSION"), "1.11.9999").unwrap();
     let options = Opt { experimental_dumpless_upgrade: true, ..default_settings };
-    let err = Server::new_with_options(options).await.map(|_| ()).unwrap_err();
-    snapshot!(err, @"Database version 1.11.9999 is too old for the experimental dumpless upgrade feature. Please generate a dump using the v1.11.9999 and import it in the v1.28.2");
+    let err = Server::new_with_options(options).await.map(|_| ()).unwrap_err().to_string();
+
+    let major = meilisearch_types::versioning::VERSION_MAJOR;
+    let minor = meilisearch_types::versioning::VERSION_MINOR;
+    let patch = meilisearch_types::versioning::VERSION_PATCH;
+
+    let current_version = format!("{major}.{minor}.{patch}");
+    let err = err.replace(&current_version, "[current version]");
+
+    snapshot!(err, @"Database version 1.11.9999 is too old for the experimental dumpless upgrade feature. Please generate a dump using the v1.11.9999 and import it in the v[current version]");
 }
 
 #[actix_rt::test]
@@ -54,11 +62,21 @@ async fn version_requires_downgrade() {
     std::fs::create_dir_all(&db_path).unwrap();
     let major = meilisearch_types::versioning::VERSION_MAJOR;
     let minor = meilisearch_types::versioning::VERSION_MINOR;
-    let patch = meilisearch_types::versioning::VERSION_PATCH + 1;
-    std::fs::write(db_path.join("VERSION"), format!("{major}.{minor}.{patch}")).unwrap();
+    let mut patch = meilisearch_types::versioning::VERSION_PATCH;
+
+    let current_version = format!("{major}.{minor}.{patch}");
+    patch += 1;
+    let future_version = format!("{major}.{minor}.{patch}");
+
+    std::fs::write(db_path.join("VERSION"), &future_version).unwrap();
     let options = Opt { experimental_dumpless_upgrade: true, ..default_settings };
     let err = Server::new_with_options(options).await.map(|_| ()).unwrap_err();
-    snapshot!(err, @"Database version 1.28.3 is higher than the Meilisearch version 1.28.2. Downgrade is not supported");
+
+    let err = err.to_string();
+    let err = err.replace(&current_version, "[current version]");
+    let err = err.replace(&future_version, "[future version]");
+
+    snapshot!(err, @"Database version [future version] is higher than the Meilisearch version [current version]. Downgrade is not supported");
 }
 
 #[actix_rt::test]

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/batches_filter_afterEnqueuedAt_equal_2025-01-16T16_47_41.snap

@@ -8,7 +8,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "progress": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "stats": {
         "totalNbTasks": 1,

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/batches_filter_afterFinishedAt_equal_2025-01-16T16_47_41.snap

@@ -8,7 +8,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "progress": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "stats": {
         "totalNbTasks": 1,

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/batches_filter_afterStartedAt_equal_2025-01-16T16_47_41.snap

@@ -8,7 +8,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "progress": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "stats": {
         "totalNbTasks": 1,

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/tasks_filter_afterEnqueuedAt_equal_2025-01-16T16_47_41.snap

@@ -12,7 +12,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "canceledBy": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "error": null,
       "duration": "[duration]",

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/tasks_filter_afterFinishedAt_equal_2025-01-16T16_47_41.snap

@@ -12,7 +12,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "canceledBy": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "error": null,
       "duration": "[duration]",

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/tasks_filter_afterStartedAt_equal_2025-01-16T16_47_41.snap

@@ -12,7 +12,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "canceledBy": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "error": null,
       "duration": "[duration]",

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/the_whole_batch_queue_once_everything_has_been_processed.snap

@@ -8,7 +8,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "progress": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "stats": {
         "totalNbTasks": 1,

crates/meilisearch/tests/upgrade/v1_12/snapshots/v1_12_0.rs/check_the_index_scheduler/the_whole_task_queue_once_everything_has_been_processed.snap

@@ -12,7 +12,7 @@ source: crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs
       "canceledBy": null,
       "details": {
         "upgradeFrom": "v1.12.0",
-        "upgradeTo": "v1.28.2"
+        "upgradeTo": "[current version]"
       },
       "error": null,
       "duration": "[duration]",

crates/meilisearch/tests/upgrade/v1_12/v1_12_0.rs

@@ -166,55 +166,55 @@ async fn check_the_index_scheduler(server: &Server) {
     // We rewrite the first task for all calls because it may be the upgrade database with unknown dates and duration.
     // The other tasks should NOT change
     let (tasks, _) = server.tasks_filter("limit=1000").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "the_whole_task_queue_once_everything_has_been_processed");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "the_whole_task_queue_once_everything_has_been_processed");
     let (batches, _) = server.batches_filter("limit=1000").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "the_whole_batch_queue_once_everything_has_been_processed");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "the_whole_batch_queue_once_everything_has_been_processed");
 
     // Tests all the tasks query parameters
     let (tasks, _) = server.tasks_filter("uids=10").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_uids_equal_10");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_uids_equal_10");
     let (tasks, _) = server.tasks_filter("batchUids=10").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_batchUids_equal_10");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_batchUids_equal_10");
     let (tasks, _) = server.tasks_filter("statuses=canceled").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_statuses_equal_canceled");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_statuses_equal_canceled");
     // types has already been tested above to retrieve the upgrade database
     let (tasks, _) = server.tasks_filter("canceledBy=19").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_canceledBy_equal_19");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_canceledBy_equal_19");
     let (tasks, _) = server.tasks_filter("beforeEnqueuedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_beforeEnqueuedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_beforeEnqueuedAt_equal_2025-01-16T16_47_41");
     let (tasks, _) = server.tasks_filter("afterEnqueuedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_afterEnqueuedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_afterEnqueuedAt_equal_2025-01-16T16_47_41");
     let (tasks, _) = server.tasks_filter("beforeStartedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_beforeStartedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_beforeStartedAt_equal_2025-01-16T16_47_41");
     let (tasks, _) = server.tasks_filter("afterStartedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_afterStartedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_afterStartedAt_equal_2025-01-16T16_47_41");
     let (tasks, _) = server.tasks_filter("beforeFinishedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_beforeFinishedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_beforeFinishedAt_equal_2025-01-16T16_47_41");
     let (tasks, _) = server.tasks_filter("afterFinishedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(tasks, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_afterFinishedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(tasks, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]" }), name: "tasks_filter_afterFinishedAt_equal_2025-01-16T16_47_41");
 
     // Tests all the batches query parameters
     let (batches, _) = server.batches_filter("uids=10").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_uids_equal_10");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_uids_equal_10");
     let (batches, _) = server.batches_filter("batchUids=10").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_batchUids_equal_10");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_batchUids_equal_10");
     let (batches, _) = server.batches_filter("statuses=canceled").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_statuses_equal_canceled");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_statuses_equal_canceled");
     // types has already been tested above to retrieve the upgrade database
     let (batches, _) = server.batches_filter("canceledBy=19").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_canceledBy_equal_19");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_canceledBy_equal_19");
     let (batches, _) = server.batches_filter("beforeEnqueuedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_beforeEnqueuedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_beforeEnqueuedAt_equal_2025-01-16T16_47_41");
     let (batches, _) = server.batches_filter("afterEnqueuedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_afterEnqueuedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_afterEnqueuedAt_equal_2025-01-16T16_47_41");
     let (batches, _) = server.batches_filter("beforeStartedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_beforeStartedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_beforeStartedAt_equal_2025-01-16T16_47_41");
     let (batches, _) = server.batches_filter("afterStartedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_afterStartedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_afterStartedAt_equal_2025-01-16T16_47_41");
     let (batches, _) = server.batches_filter("beforeFinishedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_beforeFinishedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_beforeFinishedAt_equal_2025-01-16T16_47_41");
     let (batches, _) = server.batches_filter("afterFinishedAt=2025-01-16T16:47:41Z").await;
-    snapshot!(json_string!(batches, { ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_afterFinishedAt_equal_2025-01-16T16_47_41");
+    snapshot!(json_string!(batches, { ".results[0].details.upgradeTo" => "[current version]", ".results[0].duration" => "[duration]", ".results[0].enqueuedAt" => "[date]", ".results[0].startedAt" => "[date]", ".results[0].finishedAt" => "[date]", ".results[0].stats.progressTrace" => "[progressTrace]", ".results[0].stats.internalDatabaseSizes" => "[internalDatabaseSizes]", ".results[0].stats.writeChannelCongestion" => "[writeChannelCongestion]" }), name: "batches_filter_afterFinishedAt_equal_2025-01-16T16_47_41");
 
     let (stats, _) = server.stats().await;
     assert_json_snapshot!(stats, {

crates/meilisearch/tests/vector/binary_quantized.rs

@@ -104,8 +104,8 @@ async fn binary_quantize_before_sending_documents() {
             "manual": {
               "embeddings": [
                 [
-                  -1.0,
-                  -1.0,
+                  0.0,
+                  0.0,
                   1.0
                 ]
               ],
@@ -122,7 +122,7 @@ async fn binary_quantize_before_sending_documents() {
                 [
                   1.0,
                   1.0,
-                  -1.0
+                  0.0
                 ]
               ],
               "regenerate": false
@@ -191,8 +191,8 @@ async fn binary_quantize_after_sending_documents() {
             "manual": {
               "embeddings": [
                 [
-                  -1.0,
-                  -1.0,
+                  0.0,
+                  0.0,
                   1.0
                 ]
               ],
@@ -209,7 +209,7 @@ async fn binary_quantize_after_sending_documents() {
                 [
                   1.0,
                   1.0,
-                  -1.0
+                  0.0
                 ]
               ],
               "regenerate": false

crates/meilisearch/tests/vector/huggingface.rs

@@ -0,0 +1,43 @@
+use meili_snap::snapshot;
+
+use crate::common::{GetAllDocumentsOptions, Server};
+use crate::json;
+
+#[actix_rt::test]
+async fn hf_bge_m3_force_cls_settings() {
+    let server = Server::new_shared();
+    let index = server.unique_index();
+
+    let (response, code) = index
+        .update_settings(json!({
+          "embedders": {
+              "default": {
+                  "source": "huggingFace",
+                  "model": "baai/bge-m3",
+                  "revision": "5617a9f61b028005a4858fdac845db406aefb181",
+                  "pooling": "forceCls",
+                  // minimal template to allow potential document embedding if used later
+                  "documentTemplate": "{{doc.title}}"
+              }
+          }
+        }))
+        .await;
+    snapshot!(code, @"202 Accepted");
+    server.wait_task(response.uid()).await.succeeded();
+
+    // Try to embed one simple document
+    let (task, code) =
+        index.add_documents(json!([{ "id": 1, "title": "Hello world" }]), None).await;
+    snapshot!(code, @"202 Accepted");
+    server.wait_task(task.uid()).await.succeeded();
+
+    // Retrieve the document with vectors and assert embeddings were produced
+    let (documents, _code) = index
+        .get_all_documents(GetAllDocumentsOptions { retrieve_vectors: true, ..Default::default() })
+        .await;
+    let has_vectors = documents["results"][0]["_vectors"]["default"]["embeddings"]
+        .as_array()
+        .map(|a| !a.is_empty())
+        .unwrap_or(false);
+    snapshot!(has_vectors, @"true");
+}

crates/meilisearch/tests/vector/mod.rs

@@ -1,5 +1,6 @@
 mod binary_quantized;
 mod fragments;
+mod huggingface;
 #[cfg(feature = "test-ollama")]
 mod ollama;
 mod openai;

crates/milli/Cargo.toml

@@ -91,7 +91,7 @@ rhai = { version = "1.23.6", features = [
     "sync",
 ] }
 arroy = "0.6.4-nested-rtxns"
-hannoy = { version = "0.0.9-nested-rtxns-2", features = ["arroy"] }
+hannoy = { version = "0.1.0-nested-rtxns", features = ["arroy"] }
 rand = "0.8.5"
 tracing = "0.1.41"
 ureq = { version = "2.12.1", features = ["json"] }
@@ -120,14 +120,16 @@ twox-hash = { version = "2.1.2", default-features = false, features = [
 ] }
 geo-types = "0.7.17"
 zerometry = "0.3.0"
+bitpacking = "0.9.2"
 
 [dev-dependencies]
-mimalloc = { version = "0.1.48", default-features = false }
 # fixed version due to format breakages in v1.40
 insta = "=1.39.0"
+mimalloc = { version = "0.1.48", default-features = false }
 maplit = "1.0.2"
 md5 = "0.8.0"
 meili-snap = { path = "../meili-snap" }
+quickcheck = "1.0.3"
 rand = { version = "0.8.5", features = ["small_rng"] }
 
 [features]

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

@@ -12,7 +12,7 @@ use roaring::RoaringBitmap;
 pub use self::field_doc_id_facet_codec::FieldDocIdFacetCodec;
 pub use self::ordered_f64_codec::OrderedF64Codec;
 use super::StrRefCodec;
-use crate::{CboRoaringBitmapCodec, BEU16};
+use crate::{DeCboRoaringBitmapCodec, BEU16};
 
 pub type FieldDocIdFacetF64Codec = FieldDocIdFacetCodec<OrderedF64Codec>;
 pub type FieldDocIdFacetStringCodec = FieldDocIdFacetCodec<StrRefCodec>;
@@ -97,7 +97,7 @@ impl<'a> heed::BytesEncode<'a> for FacetGroupValueCodec {
 
     fn bytes_encode(value: &'a Self::EItem) -> Result<Cow<'a, [u8]>, BoxedError> {
         let mut v = vec![value.size];
-        CboRoaringBitmapCodec::serialize_into_vec(&value.bitmap, &mut v);
+        DeCboRoaringBitmapCodec::serialize_into(&value.bitmap, &mut v);
         Ok(Cow::Owned(v))
     }
 }
@@ -107,7 +107,7 @@ impl<'a> heed::BytesDecode<'a> for FacetGroupValueCodec {
 
     fn bytes_decode(bytes: &'a [u8]) -> Result<Self::DItem, BoxedError> {
         let size = bytes[0];
-        let bitmap = CboRoaringBitmapCodec::deserialize_from(&bytes[1..])?;
+        let bitmap = DeCboRoaringBitmapCodec::deserialize_from(&bytes[1..])?;
         Ok(FacetGroupValue { size, bitmap })
     }
 }

crates/milli/src/heed_codec/mod.rs

@@ -22,7 +22,9 @@ pub use self::beu32_str_codec::BEU32StrCodec;
 pub use self::field_id_word_count_codec::FieldIdWordCountCodec;
 pub use self::fst_set_codec::FstSetCodec;
 pub use self::obkv_codec::ObkvCodec;
-pub use self::roaring_bitmap::{BoRoaringBitmapCodec, CboRoaringBitmapCodec, RoaringBitmapCodec};
+pub use self::roaring_bitmap::{
+    BoRoaringBitmapCodec, DeCboRoaringBitmapCodec, RoaringBitmapCodec, DELTA_ENCODING_STATUS,
+};
 pub use self::roaring_bitmap_length::{
     BoRoaringBitmapLenCodec, CboRoaringBitmapLenCodec, RoaringBitmapLenCodec,
 };

crates/milli/src/heed_codec/roaring_bitmap/cbo_roaring_bitmap_codec.rs

@@ -19,8 +19,19 @@ pub const THRESHOLD: usize = 7;
 pub struct CboRoaringBitmapCodec;
 
 impl CboRoaringBitmapCodec {
+    /// If the number of items (u32s) to encode is less than or equal to the threshold
+    /// it means that it would weigh the same or less than the RoaringBitmap
+    /// header, so we directly encode them using ByteOrder instead.
+    pub fn bitmap_serialize_as_raw_u32s(roaring: &RoaringBitmap) -> bool {
+        roaring.len() <= THRESHOLD as u64
+    }
+
+    pub fn bytes_deserialize_as_raw_u32s(bytes: &[u8]) -> bool {
+        bytes.len() <= THRESHOLD * size_of::<u32>()
+    }
+
     pub fn serialized_size(roaring: &RoaringBitmap) -> usize {
-        if roaring.len() <= THRESHOLD as u64 {
+        if Self::bitmap_serialize_as_raw_u32s(roaring) {
             roaring.len() as usize * size_of::<u32>()
         } else {
             roaring.serialized_size()
@@ -35,10 +46,7 @@ impl CboRoaringBitmapCodec {
         roaring: &RoaringBitmap,
         mut writer: W,
     ) -> io::Result<()> {
-        if roaring.len() <= THRESHOLD as u64 {
-            // If the number of items (u32s) to encode is less than or equal to the threshold
-            // it means that it would weigh the same or less than the RoaringBitmap
-            // header, so we directly encode them using ByteOrder instead.
+        if Self::bitmap_serialize_as_raw_u32s(roaring) {
             for integer in roaring {
                 writer.write_u32::<NativeEndian>(integer)?;
             }
@@ -51,7 +59,7 @@ impl CboRoaringBitmapCodec {
     }
 
     pub fn deserialize_from(mut bytes: &[u8]) -> io::Result<RoaringBitmap> {
-        if bytes.len() <= THRESHOLD * size_of::<u32>() {
+        if Self::bytes_deserialize_as_raw_u32s(bytes) {
             // If there is threshold or less than threshold integers that can fit into this array
             // of bytes it means that we used the ByteOrder codec serializer.
             let mut bitmap = RoaringBitmap::new();
@@ -71,7 +79,7 @@ impl CboRoaringBitmapCodec {
         other: &RoaringBitmap,
     ) -> io::Result<RoaringBitmap> {
         // See above `deserialize_from` method for implementation details.
-        if bytes.len() <= THRESHOLD * size_of::<u32>() {
+        if Self::bytes_deserialize_as_raw_u32s(bytes) {
             let mut bitmap = RoaringBitmap::new();
             while let Ok(integer) = bytes.read_u32::<NativeEndian>() {
                 if other.contains(integer) {
@@ -98,7 +106,7 @@ impl CboRoaringBitmapCodec {
         let mut vec = Vec::new();
 
         for bytes in slices {
-            if bytes.as_ref().len() <= THRESHOLD * size_of::<u32>() {
+            if Self::bytes_deserialize_as_raw_u32s(bytes.as_ref()) {
                 let mut reader = bytes.as_ref();
                 while let Ok(integer) = reader.read_u32::<NativeEndian>() {
                     vec.push(integer);
@@ -112,6 +120,8 @@ impl CboRoaringBitmapCodec {
             vec.sort_unstable();
             vec.dedup();
 
+            // Be careful when modifying this condition,
+            // the rule must be the same everywhere
             if vec.len() <= THRESHOLD {
                 for integer in vec {
                     buffer.extend_from_slice(&integer.to_ne_bytes());

crates/milli/src/heed_codec/roaring_bitmap/de_cbo_roaring_bitmap_codec.rs

@@ -0,0 +1,177 @@
+use std::borrow::Cow;
+use std::io::{self, ErrorKind};
+use std::sync::OnceLock;
+
+use heed::BoxedError;
+use roaring::RoaringBitmap;
+
+use super::cbo_roaring_bitmap_codec::CboRoaringBitmapCodec;
+use super::de_roaring_bitmap_codec::DeRoaringBitmapCodec;
+use crate::heed_codec::BytesDecodeOwned;
+use crate::update::del_add::KvReaderDelAdd;
+
+/// Defines the status of the delta encoding on whether we have enabled it or not.
+pub static DELTA_ENCODING_STATUS: DeltaEncodingStatusLock = DeltaEncodingStatusLock::new();
+
+pub struct DeCboRoaringBitmapCodec;
+
+impl DeCboRoaringBitmapCodec {
+    pub fn serialized_size_with_tmp_buffer(
+        bitmap: &RoaringBitmap,
+        tmp_buffer: &mut Vec<u32>,
+    ) -> usize {
+        // We are stuck with this format because the CboRoaringBitmapCodec decides to write
+        // raw and unencoded u32s, without a header when there is at most THRESHOLD elements.
+        if CboRoaringBitmapCodec::bitmap_serialize_as_raw_u32s(bitmap)
+            && DELTA_ENCODING_STATUS.is_disabled()
+        {
+            CboRoaringBitmapCodec::serialized_size(bitmap)
+        } else {
+            DeRoaringBitmapCodec::serialized_size_with_tmp_buffer(bitmap, tmp_buffer)
+        }
+    }
+
+    /// Writes the delta-encoded compressed version of
+    /// the given roaring bitmap into the provided writer.
+    pub fn serialize_into<W: io::Write>(bitmap: &RoaringBitmap, writer: &mut W) -> io::Result<()> {
+        let mut tmp_buffer = Vec::new();
+        Self::serialize_into_with_tmp_buffer(bitmap, writer, &mut tmp_buffer)
+    }
+
+    /// Same as [Self::serialize_into] but accepts a buffer to avoid allocating one.
+    ///
+    /// Note that we always serialize the bitmap with the delta-encoded compressed version.
+    pub fn serialize_into_with_tmp_buffer<W: io::Write>(
+        bitmap: &RoaringBitmap,
+        writer: &mut W,
+        tmp_buffer: &mut Vec<u32>,
+    ) -> io::Result<()> {
+        // We are stuck with this format because the CboRoaringBitmapCodec decides to write
+        // raw and unencoded u32s, without a header when there is at most THRESHOLD elements.
+        if CboRoaringBitmapCodec::bitmap_serialize_as_raw_u32s(bitmap)
+            && DELTA_ENCODING_STATUS.is_disabled()
+        {
+            CboRoaringBitmapCodec::serialize_into_writer(bitmap, writer)
+        } else {
+            DeRoaringBitmapCodec::serialize_into_with_tmp_buffer(bitmap, writer, tmp_buffer)
+        }
+    }
+
+    /// Returns the delta-decoded roaring bitmap from the compressed bytes.
+    pub fn deserialize_from(compressed: &[u8]) -> io::Result<RoaringBitmap> {
+        let mut tmp_buffer = Vec::new();
+        Self::deserialize_from_with_tmp_buffer(compressed, &mut tmp_buffer)
+    }
+
+    /// Same as [Self::deserialize_from] but accepts a buffer to avoid allocating one.
+    ///
+    /// It tries to decode the input by using the delta-decoded version and
+    /// if it fails, falls back to the CboRoaringBitmap version.
+    pub fn deserialize_from_with_tmp_buffer(
+        input: &[u8],
+        tmp_buffer: &mut Vec<u32>,
+    ) -> io::Result<RoaringBitmap> {
+        // The input is too short to be a valid delta-decoded bitmap.
+        // We fall back to the CboRoaringBitmap version with raw u32s.
+        if CboRoaringBitmapCodec::bytes_deserialize_as_raw_u32s(input) {
+            return CboRoaringBitmapCodec::deserialize_from(input);
+        }
+
+        match DeRoaringBitmapCodec::deserialize_from_with_tmp_buffer(input, tmp_buffer) {
+            Ok(bitmap) => Ok(bitmap),
+            // If the error kind is Other it means that the delta-decoder found
+            // an invalid magic header. We fall back to the CboRoaringBitmap version.
+            Err(e) if e.kind() == ErrorKind::Other => {
+                CboRoaringBitmapCodec::deserialize_from(input)
+            }
+            Err(e) => Err(e),
+        }
+    }
+
+    pub fn merge_into<I, A>(slices: I, buffer: &mut Vec<u8>) -> io::Result<()>
+    where
+        I: IntoIterator<Item = A>,
+        A: AsRef<[u8]>,
+    {
+        todo!()
+    }
+
+    pub fn intersection_with_serialized(
+        mut bytes: &[u8],
+        other: &RoaringBitmap,
+    ) -> io::Result<RoaringBitmap> {
+        todo!()
+    }
+
+    pub fn merge_deladd_into<'a>(
+        deladd: &KvReaderDelAdd,
+        previous: &[u8],
+        buffer: &'a mut Vec<u8>,
+    ) -> io::Result<Option<&'a [u8]>> {
+        todo!()
+    }
+}
+
+impl heed::BytesDecode<'_> for DeCboRoaringBitmapCodec {
+    type DItem = RoaringBitmap;
+
+    fn bytes_decode(bytes: &[u8]) -> Result<Self::DItem, BoxedError> {
+        Self::deserialize_from(bytes).map_err(Into::into)
+    }
+}
+
+impl BytesDecodeOwned for DeCboRoaringBitmapCodec {
+    type DItem = RoaringBitmap;
+
+    fn bytes_decode_owned(bytes: &[u8]) -> Result<Self::DItem, BoxedError> {
+        Self::deserialize_from(bytes).map_err(Into::into)
+    }
+}
+
+impl heed::BytesEncode<'_> for DeCboRoaringBitmapCodec {
+    type EItem = RoaringBitmap;
+
+    fn bytes_encode(item: &Self::EItem) -> Result<Cow<'_, [u8]>, BoxedError> {
+        let mut tmp_buffer = Vec::new();
+        let capacity = Self::serialized_size_with_tmp_buffer(&item, &mut tmp_buffer);
+        let mut output = Vec::with_capacity(capacity);
+        Self::serialize_into_with_tmp_buffer(item, &mut output, &mut tmp_buffer)?;
+        Ok(Cow::Owned(output))
+    }
+}
+
+/// Manages the global status of the delta encoding.
+///
+/// Whether we must use delta encoding or not when encoding roaring bitmaps.
+pub struct DeltaEncodingStatusLock(OnceLock<DeltaEncodingStatus>);
+
+impl DeltaEncodingStatusLock {
+    pub const fn new() -> Self {
+        Self(OnceLock::new())
+    }
+}
+
+#[derive(Default)]
+enum DeltaEncodingStatus {
+    Enabled,
+    #[default]
+    Disabled,
+}
+
+impl DeltaEncodingStatusLock {
+    pub fn set_to_enabled(&self) -> Result<(), ()> {
+        self.0.set(DeltaEncodingStatus::Enabled).map_err(drop)
+    }
+
+    pub fn set_to_disabled(&self) -> Result<(), ()> {
+        self.0.set(DeltaEncodingStatus::Disabled).map_err(drop)
+    }
+
+    pub fn is_enabled(&self) -> bool {
+        matches!(self.0.get(), Some(DeltaEncodingStatus::Enabled))
+    }
+
+    pub fn is_disabled(&self) -> bool {
+        !self.is_enabled()
+    }
+}

crates/milli/src/heed_codec/roaring_bitmap/de_roaring_bitmap_codec.rs

@@ -0,0 +1,377 @@
+use std::io::{self, ErrorKind};
+use std::mem::{self, size_of, size_of_val};
+
+use bitpacking::{BitPacker, BitPacker1x, BitPacker4x, BitPacker8x};
+use roaring::RoaringBitmap;
+
+/// The magic header for our custom encoding format
+const MAGIC_HEADER: u16 = 36869;
+
+pub struct DeRoaringBitmapCodec;
+
+// TODO reintroduce:
+//  - serialized_size?
+//  - serialize_into_vec
+//  - intersection_with_serialized
+//  - merge_into
+//  - merge_deladd_into
+impl DeRoaringBitmapCodec {
+    /// Returns the serialized size of the given roaring bitmap with the delta encoding format.
+    pub fn serialized_size_with_tmp_buffer(
+        bitmap: &RoaringBitmap,
+        tmp_buffer: &mut Vec<u32>,
+    ) -> usize {
+        let mut size = 2; // u16 magic header
+
+        let bitpacker8x = BitPacker8x::new();
+        let bitpacker4x = BitPacker4x::new();
+        let bitpacker1x = BitPacker1x::new();
+
+        // This temporary buffer is used to store each chunk of decompressed u32s.
+        tmp_buffer.resize(BitPacker8x::BLOCK_LEN, 0u32);
+        let decompressed = &mut tmp_buffer[..];
+
+        let mut buffer_index = 0;
+        let mut initial = None;
+        // We initially collect all the integers into a flat buffer of the size
+        // of the largest bitpacker. We encode them with it until we don't have
+        // enough of them...
+        for n in bitmap {
+            decompressed[buffer_index] = n;
+            buffer_index += 1;
+            if buffer_index == BitPacker8x::BLOCK_LEN {
+                let num_bits = bitpacker8x.num_bits_strictly_sorted(initial, decompressed);
+                let compressed_len = BitPacker8x::compressed_block_size(num_bits);
+                size += 1; // u8 chunk header
+                size += compressed_len; // compressed data length
+                initial = Some(n);
+                buffer_index = 0;
+            }
+        }
+
+        // ...We then switch to a smaller bitpacker to encode the remaining chunks...
+        let decompressed = &decompressed[..buffer_index];
+        let mut chunks = decompressed.chunks_exact(BitPacker4x::BLOCK_LEN);
+        for decompressed in chunks.by_ref() {
+            let num_bits = bitpacker4x.num_bits_strictly_sorted(initial, decompressed);
+            let compressed_len = BitPacker4x::compressed_block_size(num_bits);
+            size += 1; // u8 chunk header
+            size += compressed_len; // compressed data length
+            initial = decompressed.iter().last().copied();
+        }
+
+        // ...And so on...
+        let decompressed = chunks.remainder();
+        let mut chunks = decompressed.chunks_exact(BitPacker1x::BLOCK_LEN);
+        for decompressed in chunks.by_ref() {
+            let num_bits = bitpacker1x.num_bits_strictly_sorted(initial, decompressed);
+            let compressed_len = BitPacker1x::compressed_block_size(num_bits);
+            size += 1; // u8 chunk header
+            size += compressed_len; // compressed data length
+            initial = decompressed.iter().last().copied();
+        }
+
+        // ...Until we don't have any small enough bitpacker. We put them raw
+        // at the end of out buffer with a header indicating the matter.
+        let decompressed = chunks.remainder();
+        if !decompressed.is_empty() {
+            size += 1; // u8 chunk header
+            size += mem::size_of_val(decompressed); // remaining uncompressed u32s
+        }
+
+        size
+    }
+
+    /// Writes the delta-encoded compressed version of
+    /// the given roaring bitmap into the provided writer.
+    pub fn serialize_into<W: io::Write>(bitmap: &RoaringBitmap, writer: W) -> io::Result<()> {
+        let mut tmp_buffer = Vec::new();
+        Self::serialize_into_with_tmp_buffer(bitmap, writer, &mut tmp_buffer)
+    }
+
+    /// Same as [Self::serialize_into] but accepts a buffer to avoid allocating one.
+    pub fn serialize_into_with_tmp_buffer<W: io::Write>(
+        bitmap: &RoaringBitmap,
+        mut writer: W,
+        tmp_buffer: &mut Vec<u32>,
+    ) -> io::Result<()> {
+        // Insert the magic header
+        writer.write_all(&MAGIC_HEADER.to_ne_bytes())?;
+
+        let bitpacker8x = BitPacker8x::new();
+        let bitpacker4x = BitPacker4x::new();
+        let bitpacker1x = BitPacker1x::new();
+
+        // This temporary buffer is used to store each chunk of decompressed and
+        // compressed and delta-encoded u32s. We need room for the decompressed
+        // u32s coming from the roaring bitmap, the compressed output that can
+        // be as large as the decompressed u32s, and the chunk header.
+        tmp_buffer.resize((BitPacker8x::BLOCK_LEN * 2) + 1, 0u32);
+        let (decompressed, compressed) = tmp_buffer.split_at_mut(BitPacker8x::BLOCK_LEN);
+        let compressed = bytemuck::cast_slice_mut(compressed);
+
+        let mut buffer_index = 0;
+        let mut initial = None;
+        // We initially collect all the integers into a flat buffer of the size
+        // of the largest bitpacker. We encode them with it until we don't have
+        // enough of them...
+        for n in bitmap {
+            decompressed[buffer_index] = n;
+            buffer_index += 1;
+            if buffer_index == BitPacker8x::BLOCK_LEN {
+                let output = encode_with_packer(&bitpacker8x, decompressed, initial, compressed);
+                writer.write_all(output)?;
+                initial = Some(n);
+                buffer_index = 0;
+            }
+        }
+
+        // ...We then switch to a smaller bitpacker to encode the remaining chunks...
+        let decompressed = &decompressed[..buffer_index];
+        let mut chunks = decompressed.chunks_exact(BitPacker4x::BLOCK_LEN);
+        for decompressed in chunks.by_ref() {
+            let output = encode_with_packer(&bitpacker4x, decompressed, initial, compressed);
+            writer.write_all(output)?;
+            initial = decompressed.iter().last().copied();
+        }
+
+        // ...And so on...
+        let decompressed = chunks.remainder();
+        let mut chunks = decompressed.chunks_exact(BitPacker1x::BLOCK_LEN);
+        for decompressed in chunks.by_ref() {
+            let output = encode_with_packer(&bitpacker1x, decompressed, initial, compressed);
+            writer.write_all(output)?;
+            initial = decompressed.iter().last().copied();
+        }
+
+        // ...Until we don't have any small enough bitpacker. We put them raw
+        // at the end of out buffer with a header indicating the matter.
+        let decompressed = chunks.remainder();
+        if !decompressed.is_empty() {
+            let header = encode_chunk_header(BitPackerLevel::None, u32::BITS as u8);
+            // Note: Not convinced about the performance of writing a single
+            //       byte followed by a larger write. However, we will use this
+            //       codec with a BufWriter or directly with a Vec of bytes.
+            writer.write_all(&[header])?;
+            writer.write_all(bytemuck::cast_slice(decompressed))?;
+        }
+
+        Ok(())
+    }
+
+    /// Returns the delta-decoded roaring bitmap from the compressed bytes.
+    pub fn deserialize_from(compressed: &[u8]) -> io::Result<RoaringBitmap> {
+        let mut tmp_buffer = Vec::new();
+        Self::deserialize_from_with_tmp_buffer(compressed, &mut tmp_buffer)
+    }
+
+    /// Same as [Self::deserialize_from] but accepts a buffer to avoid allocating one.
+    pub fn deserialize_from_with_tmp_buffer(
+        input: &[u8],
+        tmp_buffer: &mut Vec<u32>,
+    ) -> io::Result<RoaringBitmap> {
+        let Some((header, mut compressed)) = input.split_at_checked(size_of_val(&MAGIC_HEADER))
+        else {
+            return Err(io::Error::new(ErrorKind::UnexpectedEof, "expecting a two-bytes header"));
+        };
+
+        // Safety: This unwrap cannot happen as the header buffer is the right size
+        let header = u16::from_ne_bytes(header.try_into().unwrap());
+
+        if header != MAGIC_HEADER {
+            return Err(io::Error::other("invalid header value"));
+        }
+
+        let bitpacker8x = BitPacker8x::new();
+        let bitpacker4x = BitPacker4x::new();
+        let bitpacker1x = BitPacker1x::new();
+
+        let mut bitmap = RoaringBitmap::new();
+        tmp_buffer.resize(BitPacker8x::BLOCK_LEN, 0u32);
+        let decompressed = &mut tmp_buffer[..];
+        let mut initial = None;
+
+        while let Some((&chunk_header, encoded)) = compressed.split_first() {
+            let (level, num_bits) = decode_chunk_header(chunk_header);
+            let (bytes_read, decompressed) = match level {
+                BitPackerLevel::None => {
+                    if num_bits != u32::BITS as u8 {
+                        return Err(io::Error::new(
+                            ErrorKind::InvalidData,
+                            "invalid number of bits to encode non-compressed u32s",
+                        ));
+                    }
+
+                    let chunks = encoded.chunks_exact(size_of::<u32>());
+                    if !chunks.remainder().is_empty() {
+                        return Err(io::Error::new(
+                            io::ErrorKind::InvalidData,
+                            "expecting last chunk to be a multiple of the size of an u32",
+                        ));
+                    }
+
+                    let integers = chunks
+                        // safety: This unwrap cannot happen as
+                        //         the size of u32 is set correctly.
+                        .map(|b| b.try_into().unwrap())
+                        .map(u32::from_ne_bytes);
+
+                    bitmap
+                        .append(integers)
+                        .map_err(|e| io::Error::new(ErrorKind::InvalidData, e))?;
+
+                    // This is basically always the last chunk that exists in
+                    // this delta-encoded format as the raw u32s are appended
+                    // when there is not enough of them to fit in a bitpacker.
+                    break;
+                }
+                BitPackerLevel::BitPacker1x => {
+                    decode_with_packer(&bitpacker1x, decompressed, initial, encoded, num_bits)
+                }
+                BitPackerLevel::BitPacker4x => {
+                    decode_with_packer(&bitpacker4x, decompressed, initial, encoded, num_bits)
+                }
+                BitPackerLevel::BitPacker8x => {
+                    decode_with_packer(&bitpacker8x, decompressed, initial, encoded, num_bits)
+                }
+            };
+
+            initial = decompressed.iter().last().copied();
+            // TODO investigate perf
+            // Safety: Bitpackers cannot output unsorter integers when
+            //         used with the compress_strictly_sorted function.
+            bitmap.append(decompressed.iter().copied()).unwrap();
+            // What the delta-decoding read plus the chunk header size
+            compressed = &compressed[bytes_read + 1..];
+        }
+
+        Ok(bitmap)
+    }
+}
+
+/// Takes a strickly sorted list of u32s and outputs delta-encoded
+/// bytes with a chunk header. We expect the output buffer to be
+/// at least BLOCK_LEN + 1.
+fn encode_with_packer<'c, B: BitPackerExt>(
+    bitpacker: &B,
+    decompressed: &[u32],
+    initial: Option<u32>,
+    output: &'c mut [u8],
+) -> &'c [u8] {
+    let num_bits = bitpacker.num_bits_strictly_sorted(initial, decompressed);
+    let compressed_len = B::compressed_block_size(num_bits);
+    let chunk_header = encode_chunk_header(B::level(), num_bits);
+    let buffer = &mut output[..compressed_len + 1];
+    // Safety: The buffer is at least one byte
+    let (header_in_buffer, encoded) = buffer.split_first_mut().unwrap();
+    *header_in_buffer = chunk_header;
+    bitpacker.compress_strictly_sorted(initial, decompressed, encoded, num_bits);
+    buffer
+}
+
+/// Returns the number of bytes read and the decoded unsigned integers.
+fn decode_with_packer<'d, B: BitPacker>(
+    bitpacker: &B,
+    decompressed: &'d mut [u32],
+    initial: Option<u32>,
+    compressed: &[u8],
+    num_bits: u8,
+) -> (usize, &'d [u32]) {
+    let decompressed = &mut decompressed[..B::BLOCK_LEN];
+    let read = bitpacker.decompress_strictly_sorted(initial, compressed, decompressed, num_bits);
+    (read, decompressed)
+}
+
+/// An identifier for the bitpacker to be able
+/// to correctly decode the compressed integers.
+#[derive(Debug, PartialEq, Eq)]
+#[repr(u8)]
+enum BitPackerLevel {
+    /// The remaining bytes are raw little endian encoded u32s.
+    None,
+    /// The remaining bits are encoded using a `BitPacker1x`.
+    BitPacker1x,
+    /// The remaining bits are encoded using a `BitPacker4x`.
+    BitPacker4x,
+    /// The remaining bits are encoded using a `BitPacker8x`.
+    BitPacker8x,
+}
+
+/// Returns the chunk header based on the bitpacker level
+/// and the number of bits to encode the list of integers.
+fn encode_chunk_header(level: BitPackerLevel, num_bits: u8) -> u8 {
+    debug_assert!(num_bits as u32 <= 2_u32.pow(6));
+    let level = level as u8;
+    debug_assert!(level <= 3);
+    num_bits | (level << 6)
+}
+
+/// Decodes the chunk header and output the bitpacker level
+/// and the number of bits to decode the following bytes.
+fn decode_chunk_header(data: u8) -> (BitPackerLevel, u8) {
+    let num_bits = data & 0b00111111;
+    let level = match data >> 6 {
+        0 => BitPackerLevel::None,
+        1 => BitPackerLevel::BitPacker1x,
+        2 => BitPackerLevel::BitPacker4x,
+        3 => BitPackerLevel::BitPacker8x,
+        invalid => panic!("Invalid bitpacker level: {invalid}"),
+    };
+    debug_assert!(num_bits as u32 <= 2_u32.pow(6));
+    (level, num_bits)
+}
+
+/// A simple helper trait to get the BitPackerLevel
+/// and correctly generate the chunk header.
+trait BitPackerExt: BitPacker {
+    /// Returns the level of the bitpacker: an identifier to be
+    /// able to decode the numbers with the right bitpacker.
+    fn level() -> BitPackerLevel;
+}
+
+impl BitPackerExt for BitPacker8x {
+    fn level() -> BitPackerLevel {
+        BitPackerLevel::BitPacker8x
+    }
+}
+
+impl BitPackerExt for BitPacker4x {
+    fn level() -> BitPackerLevel {
+        BitPackerLevel::BitPacker4x
+    }
+}
+
+impl BitPackerExt for BitPacker1x {
+    fn level() -> BitPackerLevel {
+        BitPackerLevel::BitPacker1x
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use quickcheck::quickcheck;
+    use roaring::RoaringBitmap;
+
+    use super::DeRoaringBitmapCodec;
+
+    quickcheck! {
+        fn qc_random(xs: Vec<u32>) -> bool {
+            let bitmap = RoaringBitmap::from_iter(xs);
+            let mut compressed = Vec::new();
+            DeRoaringBitmapCodec::serialize_into(&bitmap, &mut compressed).unwrap();
+            let decompressed = DeRoaringBitmapCodec::deserialize_from(&compressed[..]).unwrap();
+            decompressed == bitmap
+        }
+    }
+
+    quickcheck! {
+        fn qc_random_check_serialized_size(xs: Vec<u32>) -> bool {
+            let bitmap = RoaringBitmap::from_iter(xs);
+            let mut compressed = Vec::new();
+            let mut tmp_buffer = Vec::new();
+            DeRoaringBitmapCodec::serialize_into(&bitmap, &mut compressed).unwrap();
+            let expected_len = DeRoaringBitmapCodec::serialized_size_with_tmp_buffer(&bitmap, &mut tmp_buffer);
+            compressed.len() == expected_len
+        }
+    }
+}

crates/milli/src/heed_codec/roaring_bitmap/mod.rs

@@ -1,7 +1,10 @@
 mod bo_roaring_bitmap_codec;
 pub mod cbo_roaring_bitmap_codec;
+pub mod de_cbo_roaring_bitmap_codec;
+mod de_roaring_bitmap_codec;
 mod roaring_bitmap_codec;
 
 pub use self::bo_roaring_bitmap_codec::BoRoaringBitmapCodec;
-pub use self::cbo_roaring_bitmap_codec::CboRoaringBitmapCodec;
+// pub use self::cbo_roaring_bitmap_codec::CboRoaringBitmapCodec;
+pub use self::de_cbo_roaring_bitmap_codec::{DeCboRoaringBitmapCodec, DELTA_ENCODING_STATUS};
 pub use self::roaring_bitmap_codec::RoaringBitmapCodec;

crates/milli/src/index.rs

@@ -34,7 +34,7 @@ use crate::update::new::StdResult;
 use crate::vector::db::IndexEmbeddingConfigs;
 use crate::vector::{Embedding, VectorStore, VectorStoreBackend, VectorStoreStats};
 use crate::{
-    default_criteria, CboRoaringBitmapCodec, Criterion, DocumentId, ExternalDocumentsIds,
+    default_criteria, Criterion, DeCboRoaringBitmapCodec, DocumentId, ExternalDocumentsIds,
     FacetDistribution, FieldDistribution, FieldId, FieldIdMapMissingEntry, FieldIdWordCountCodec,
     FieldidsWeightsMap, FilterableAttributesRule, GeoPoint, LocalizedAttributesRule, ObkvCodec,
     Result, RoaringBitmapCodec, RoaringBitmapLenCodec, Search, U8StrStrCodec, Weight, BEU16, BEU32,
@@ -133,38 +133,38 @@ pub struct Index {
     pub external_documents_ids: Database<Str, BEU32>,
 
     /// A word and all the documents ids containing the word.
-    pub word_docids: Database<Str, CboRoaringBitmapCodec>,
+    pub word_docids: Database<Str, DeCboRoaringBitmapCodec>,
 
     /// A word and all the documents ids containing the word, from attributes for which typos are not allowed.
-    pub exact_word_docids: Database<Str, CboRoaringBitmapCodec>,
+    pub exact_word_docids: Database<Str, DeCboRoaringBitmapCodec>,
 
     /// A prefix of word and all the documents ids containing this prefix.
-    pub word_prefix_docids: Database<Str, CboRoaringBitmapCodec>,
+    pub word_prefix_docids: Database<Str, DeCboRoaringBitmapCodec>,
 
     /// A prefix of word and all the documents ids containing this prefix, from attributes for which typos are not allowed.
-    pub exact_word_prefix_docids: Database<Str, CboRoaringBitmapCodec>,
+    pub exact_word_prefix_docids: Database<Str, DeCboRoaringBitmapCodec>,
 
     /// Maps the proximity between a pair of words with all the docids where this relation appears.
-    pub word_pair_proximity_docids: Database<U8StrStrCodec, CboRoaringBitmapCodec>,
+    pub word_pair_proximity_docids: Database<U8StrStrCodec, DeCboRoaringBitmapCodec>,
 
     /// Maps the word and the position with the docids that corresponds to it.
-    pub word_position_docids: Database<StrBEU16Codec, CboRoaringBitmapCodec>,
+    pub word_position_docids: Database<StrBEU16Codec, DeCboRoaringBitmapCodec>,
     /// Maps the word and the field id with the docids that corresponds to it.
-    pub word_fid_docids: Database<StrBEU16Codec, CboRoaringBitmapCodec>,
+    pub word_fid_docids: Database<StrBEU16Codec, DeCboRoaringBitmapCodec>,
 
     /// Maps the field id and the word count with the docids that corresponds to it.
-    pub field_id_word_count_docids: Database<FieldIdWordCountCodec, CboRoaringBitmapCodec>,
+    pub field_id_word_count_docids: Database<FieldIdWordCountCodec, DeCboRoaringBitmapCodec>,
     /// Maps the word prefix and a position with all the docids where the prefix appears at the position.
-    pub word_prefix_position_docids: Database<StrBEU16Codec, CboRoaringBitmapCodec>,
+    pub word_prefix_position_docids: Database<StrBEU16Codec, DeCboRoaringBitmapCodec>,
     /// Maps the word prefix and a field id with all the docids where the prefix appears inside the field
-    pub word_prefix_fid_docids: Database<StrBEU16Codec, CboRoaringBitmapCodec>,
+    pub word_prefix_fid_docids: Database<StrBEU16Codec, DeCboRoaringBitmapCodec>,
 
     /// Maps the facet field id and the docids for which this field exists
-    pub facet_id_exists_docids: Database<FieldIdCodec, CboRoaringBitmapCodec>,
+    pub facet_id_exists_docids: Database<FieldIdCodec, DeCboRoaringBitmapCodec>,
     /// Maps the facet field id and the docids for which this field is set as null
-    pub facet_id_is_null_docids: Database<FieldIdCodec, CboRoaringBitmapCodec>,
+    pub facet_id_is_null_docids: Database<FieldIdCodec, DeCboRoaringBitmapCodec>,
     /// Maps the facet field id and the docids for which this field is considered empty
-    pub facet_id_is_empty_docids: Database<FieldIdCodec, CboRoaringBitmapCodec>,
+    pub facet_id_is_empty_docids: Database<FieldIdCodec, DeCboRoaringBitmapCodec>,
 
     /// Maps the facet field id and ranges of numbers with the docids that corresponds to them.
     pub facet_id_f64_docids: Database<FacetGroupKeyCodec<OrderedF64Codec>, FacetGroupValueCodec>,
@@ -281,6 +281,9 @@ impl Index {
                 &mut wtxn,
                 (constants::VERSION_MAJOR, constants::VERSION_MINOR, constants::VERSION_PATCH),
             )?;
+            // The database before v1.29 defaulted to using arroy, so we
+            // need to set it explicitly because the new default is hannoy.
+            this.put_vector_store(&mut wtxn, VectorStoreBackend::Hannoy)?;
         }
         wtxn.commit()?;
 

crates/milli/src/lib.rs

@@ -73,7 +73,7 @@ pub use self::filterable_attributes_rules::{
 };
 pub use self::heed_codec::{
     BEU16StrCodec, BEU32StrCodec, BoRoaringBitmapCodec, BoRoaringBitmapLenCodec,
-    CboRoaringBitmapCodec, CboRoaringBitmapLenCodec, FieldIdWordCountCodec, ObkvCodec,
+    CboRoaringBitmapLenCodec, DeCboRoaringBitmapCodec, FieldIdWordCountCodec, ObkvCodec,
     RoaringBitmapCodec, RoaringBitmapLenCodec, StrBEU32Codec, U8StrStrCodec,
     UncheckedU8StrStrCodec,
 };

crates/milli/src/search/facet/facet_distribution_iter.rs

@@ -10,7 +10,7 @@ use crate::heed_codec::facet::{
     FacetGroupKey, FacetGroupKeyCodec, FacetGroupLazyValueCodec, FacetGroupValueCodec,
 };
 use crate::heed_codec::BytesRefCodec;
-use crate::{CboRoaringBitmapCodec, DocumentId};
+use crate::{DeCboRoaringBitmapCodec, DocumentId};
 
 /// Call the given closure on the facet distribution of the candidate documents.
 ///
@@ -88,7 +88,7 @@ where
             if key.field_id != field_id {
                 break;
             }
-            let intersection = CboRoaringBitmapCodec::intersection_with_serialized(
+            let intersection = DeCboRoaringBitmapCodec::intersection_with_serialized(
                 value.bitmap_bytes,
                 candidates,
             )?;
@@ -120,7 +120,7 @@ where
                     if key.field_id != field_id {
                         break;
                     }
-                    let intersection = CboRoaringBitmapCodec::intersection_with_serialized(
+                    let intersection = DeCboRoaringBitmapCodec::intersection_with_serialized(
                         value.bitmap_bytes,
                         candidates,
                     )?;
@@ -173,7 +173,7 @@ where
             if key.field_id != self.field_id {
                 return Ok(ControlFlow::Break(()));
             }
-            let docids_in_common = CboRoaringBitmapCodec::intersection_with_serialized(
+            let docids_in_common = DeCboRoaringBitmapCodec::intersection_with_serialized(
                 value.bitmap_bytes,
                 candidates,
             )?;
@@ -210,7 +210,7 @@ where
             if key.field_id != self.field_id {
                 return Ok(ControlFlow::Break(()));
             }
-            let docids_in_common = CboRoaringBitmapCodec::intersection_with_serialized(
+            let docids_in_common = DeCboRoaringBitmapCodec::intersection_with_serialized(
                 value.bitmap_bytes,
                 candidates,
             )?;

crates/milli/src/search/facet/facet_range_search.rs

@@ -8,7 +8,7 @@ use crate::heed_codec::facet::{
     FacetGroupKey, FacetGroupKeyCodec, FacetGroupLazyValueCodec, FacetGroupValueCodec,
 };
 use crate::heed_codec::BytesRefCodec;
-use crate::{CboRoaringBitmapCodec, Result};
+use crate::{DeCboRoaringBitmapCodec, Result};
 
 /// Find all the document ids for which the given field contains a value contained within
 /// the two bounds.
@@ -114,11 +114,11 @@ impl<'t> FacetRangeSearch<'t, '_, '_> {
 
             if RangeBounds::<&[u8]>::contains(&(self.left, self.right), &key.left_bound) {
                 *self.docids |= match self.universe {
-                    Some(universe) => CboRoaringBitmapCodec::intersection_with_serialized(
+                    Some(universe) => DeCboRoaringBitmapCodec::intersection_with_serialized(
                         value.bitmap_bytes,
                         universe,
                     )?,
-                    None => CboRoaringBitmapCodec::deserialize_from(value.bitmap_bytes)?,
+                    None => DeCboRoaringBitmapCodec::deserialize_from(value.bitmap_bytes)?,
                 };
             }
         }
@@ -211,11 +211,11 @@ impl<'t> FacetRangeSearch<'t, '_, '_> {
             };
             if should_take_whole_group {
                 *self.docids |= match self.universe {
-                    Some(universe) => CboRoaringBitmapCodec::intersection_with_serialized(
+                    Some(universe) => DeCboRoaringBitmapCodec::intersection_with_serialized(
                         previous_value.bitmap_bytes,
                         universe,
                     )?,
-                    None => CboRoaringBitmapCodec::deserialize_from(previous_value.bitmap_bytes)?,
+                    None => DeCboRoaringBitmapCodec::deserialize_from(previous_value.bitmap_bytes)?,
                 };
                 previous_key = next_key;
                 previous_value = next_value;
@@ -313,11 +313,11 @@ impl<'t> FacetRangeSearch<'t, '_, '_> {
         };
         if should_take_whole_group {
             *self.docids |= match self.universe {
-                Some(universe) => CboRoaringBitmapCodec::intersection_with_serialized(
+                Some(universe) => DeCboRoaringBitmapCodec::intersection_with_serialized(
                     previous_value.bitmap_bytes,
                     universe,
                 )?,
-                None => CboRoaringBitmapCodec::deserialize_from(previous_value.bitmap_bytes)?,
+                None => DeCboRoaringBitmapCodec::deserialize_from(previous_value.bitmap_bytes)?,
             };
         } else {
             let level = level - 1;

crates/milli/src/search/mod.rs

@@ -385,9 +385,10 @@ pub struct SearchResult {
     pub query_vector: Option<Embedding>,
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq)]
 pub enum TermsMatchingStrategy {
     // remove last word first
+    #[default]
     Last,
     // all words are mandatory
     All,
@@ -395,12 +396,6 @@ pub enum TermsMatchingStrategy {
     Frequency,
 }
 
-impl Default for TermsMatchingStrategy {
-    fn default() -> Self {
-        Self::Last
-    }
-}
-
 impl From<MatchingStrategy> for TermsMatchingStrategy {
     fn from(other: MatchingStrategy) -> Self {
         match other {

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

@@ -14,7 +14,7 @@ use crate::heed_codec::{BytesDecodeOwned, StrBEU16Codec};
 use crate::proximity::ProximityPrecision;
 use crate::update::MergeCboRoaringBitmaps;
 use crate::{
-    CboRoaringBitmapCodec, CboRoaringBitmapLenCodec, Result, SearchContext, U8StrStrCodec,
+    CboRoaringBitmapLenCodec, DeCboRoaringBitmapCodec, Result, SearchContext, U8StrStrCodec,
 };
 
 /// A cache storing pointers to values in the LMDB databases.
@@ -72,11 +72,11 @@ impl<'ctx> DatabaseCache<'ctx> {
 
         match (bitmap_bytes, universe) {
             (bytes, Some(universe)) => {
-                CboRoaringBitmapCodec::intersection_with_serialized(bytes, universe)
+                DeCboRoaringBitmapCodec::intersection_with_serialized(bytes, universe)
                     .map(Some)
                     .map_err(Into::into)
             }
-            (bytes, None) => CboRoaringBitmapCodec::bytes_decode_owned(bytes)
+            (bytes, None) => DeCboRoaringBitmapCodec::bytes_decode_owned(bytes)
                 .map(Some)
                 .map_err(heed::Error::Decoding)
                 .map_err(Into::into),
@@ -157,11 +157,11 @@ impl<'ctx> DatabaseCache<'ctx> {
 
         match (bitmap_bytes, universe) {
             (bytes, Some(universe)) => {
-                CboRoaringBitmapCodec::intersection_with_serialized(bytes, universe)
+                DeCboRoaringBitmapCodec::intersection_with_serialized(bytes, universe)
                     .map(Some)
                     .map_err(Into::into)
             }
-            (bytes, None) => CboRoaringBitmapCodec::bytes_decode_owned(bytes)
+            (bytes, None) => DeCboRoaringBitmapCodec::bytes_decode_owned(bytes)
                 .map(Some)
                 .map_err(heed::Error::Decoding)
                 .map_err(Into::into),
@@ -377,7 +377,7 @@ impl<'ctx> SearchContext<'ctx> {
                 {
                     docids
                         .as_ref()
-                        .map(|d| CboRoaringBitmapCodec::bytes_decode_owned(d))
+                        .map(|d| DeCboRoaringBitmapCodec::bytes_decode_owned(d))
                         .transpose()
                         .map_err(heed::Error::Decoding)?
                 } else {
@@ -395,7 +395,7 @@ impl<'ctx> SearchContext<'ctx> {
                             docids |= word1_docids & word2_docids;
                         }
                     }
-                    let encoded = CboRoaringBitmapCodec::bytes_encode(&docids)
+                    let encoded = DeCboRoaringBitmapCodec::bytes_encode(&docids)
                         .map(Cow::into_owned)
                         .map(Cow::Owned)
                         .map(Some)

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

@@ -6,7 +6,7 @@ use super::ranking_rules::{RankingRule, RankingRuleOutput};
 use crate::score_details::{self, ScoreDetails};
 use crate::search::new::query_graph::QueryNodeData;
 use crate::search::new::query_term::ExactTerm;
-use crate::{CboRoaringBitmapCodec, Result, SearchContext, SearchLogger, TimeBudget};
+use crate::{DeCboRoaringBitmapCodec, Result, SearchContext, SearchLogger, TimeBudget};
 
 /// A ranking rule that produces 3 disjoint buckets:
 ///
@@ -219,7 +219,7 @@ impl State {
 
                     match bitmap_bytes {
                         Some(bytes) => {
-                            CboRoaringBitmapCodec::intersection_with_serialized(bytes, universe)?
+                            DeCboRoaringBitmapCodec::intersection_with_serialized(bytes, universe)?
                         }
                         None => RoaringBitmap::default(),
                     }

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

@@ -15,7 +15,7 @@ use crate::heed_codec::BytesRefCodec;
 use crate::update::del_add::{DelAdd, KvReaderDelAdd};
 use crate::update::index_documents::{create_writer, valid_lmdb_key, writer_into_reader};
 use crate::update::MergeDeladdCboRoaringBitmaps;
-use crate::{CboRoaringBitmapCodec, CboRoaringBitmapLenCodec, FieldId, Index, Result};
+use crate::{CboRoaringBitmapLenCodec, DeCboRoaringBitmapCodec, FieldId, Index, Result};
 
 /// Algorithm to insert elememts into the `facet_id_(string/f64)_docids` databases
 /// by rebuilding the database "from scratch".
@@ -162,7 +162,7 @@ impl<R: std::io::Read + std::io::Seek> FacetsUpdateBulkInner<R> {
                     Some(prev_value) => {
                         // prev_value is the group size for level 0, followed by the previous bitmap.
                         let old_bitmap = &prev_value[1..];
-                        CboRoaringBitmapCodec::merge_deladd_into(value, old_bitmap, &mut buffer)?;
+                        DeCboRoaringBitmapCodec::merge_deladd_into(value, old_bitmap, &mut buffer)?;
                     }
                     None => {
                         // it is safe to ignore the del in that case.

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

@@ -16,7 +16,7 @@ use crate::search::facet::get_highest_level;
 use crate::update::del_add::DelAdd;
 use crate::update::index_documents::valid_lmdb_key;
 use crate::update::MergeDeladdCboRoaringBitmaps;
-use crate::{CboRoaringBitmapCodec, Index, Result};
+use crate::{DeCboRoaringBitmapCodec, Index, Result};
 
 /// Enum used as a return value for the facet incremental indexing.
 ///
@@ -112,13 +112,13 @@ impl FacetsUpdateIncremental {
             let value = KvReader::from_slice(value);
             let docids_to_delete = value
                 .get(DelAdd::Deletion)
-                .map(CboRoaringBitmapCodec::bytes_decode)
+                .map(DeCboRoaringBitmapCodec::bytes_decode)
                 .map(|o| o.map_err(heed::Error::Encoding))
                 .transpose()?;
 
             let docids_to_add = value
                 .get(DelAdd::Addition)
-                .map(CboRoaringBitmapCodec::bytes_decode)
+                .map(DeCboRoaringBitmapCodec::bytes_decode)
                 .map(|o| o.map_err(heed::Error::Encoding))
                 .transpose()?;
 

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

@@ -366,7 +366,7 @@ pub(crate) mod test_helpers {
     use crate::update::del_add::{DelAdd, KvWriterDelAdd};
     use crate::update::index_documents::MergeDeladdCboRoaringBitmaps;
     use crate::update::FacetsUpdateIncrementalInner;
-    use crate::CboRoaringBitmapCodec;
+    use crate::DeCboRoaringBitmapCodec;
 
     /// Utility function to generate a string whose position in a lexicographically
     /// ordered list is `i`.
@@ -496,7 +496,7 @@ pub(crate) mod test_helpers {
                     FacetGroupKey { field_id: *field_id, level: 0, left_bound: &left_bound_bytes };
                 let key = FacetGroupKeyCodec::<BytesRefCodec>::bytes_encode(&key).unwrap();
                 let mut inner_writer = KvWriterDelAdd::memory();
-                let value = CboRoaringBitmapCodec::bytes_encode(docids).unwrap();
+                let value = DeCboRoaringBitmapCodec::bytes_encode(docids).unwrap();
                 inner_writer.insert(DelAdd::Addition, value).unwrap();
                 writer.insert(&key, inner_writer.into_inner().unwrap()).unwrap();
             }

crates/milli/src/update/index_documents/extract/extract_fid_docid_facet_values.rs

@@ -19,7 +19,7 @@ use crate::facet::value_encoding::f64_into_bytes;
 use crate::update::del_add::{DelAdd, KvReaderDelAdd, KvWriterDelAdd};
 use crate::update::index_documents::{create_writer, writer_into_reader};
 use crate::update::settings::InnerIndexSettingsDiff;
-use crate::{CboRoaringBitmapCodec, DocumentId, FieldId, Result, MAX_FACET_VALUE_LENGTH};
+use crate::{DeCboRoaringBitmapCodec, DocumentId, FieldId, Result, MAX_FACET_VALUE_LENGTH};
 
 /// The length of the elements that are always in the buffer when inserting new values.
 const TRUNCATE_SIZE: usize = size_of::<FieldId>() + size_of::<DocumentId>();
@@ -311,8 +311,8 @@ fn deladd_obkv_cbo_roaring_bitmaps(
 ) -> io::Result<()> {
     buffer.clear();
     let mut obkv = KvWriterDelAdd::new(buffer);
-    let del_bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(del_bitmap).unwrap();
-    let add_bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(add_bitmap).unwrap();
+    let del_bitmap_bytes = DeCboRoaringBitmapCodec::bytes_encode(del_bitmap).unwrap();
+    let add_bitmap_bytes = DeCboRoaringBitmapCodec::bytes_encode(add_bitmap).unwrap();
     obkv.insert(DelAdd::Deletion, del_bitmap_bytes)?;
     obkv.insert(DelAdd::Addition, add_bitmap_bytes)?;
     obkv.finish()

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

@@ -124,7 +124,7 @@ impl GrenadParameters {
     /// This should be called inside of a rayon thread pool,
     /// otherwise, it will take the global number of threads.
     pub fn max_memory_by_thread(&self) -> Option<usize> {
-        self.max_memory.map(|max_memory| (max_memory / rayon::current_num_threads()))
+        self.max_memory.map(|max_memory| max_memory / rayon::current_num_threads())
     }
 }
 

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

@@ -7,7 +7,7 @@ use either::Either;
 use grenad::MergeFunction;
 use roaring::RoaringBitmap;
 
-use crate::heed_codec::CboRoaringBitmapCodec;
+use crate::heed_codec::DeCboRoaringBitmapCodec;
 use crate::update::del_add::{DelAdd, KvReaderDelAdd, KvWriterDelAdd};
 use crate::update::index_documents::transform::Operation;
 use crate::Result;
@@ -200,7 +200,7 @@ impl MergeFunction for MergeCboRoaringBitmaps {
             Ok(values[0].clone())
         } else {
             let mut vec = Vec::new();
-            CboRoaringBitmapCodec::merge_into(values, &mut vec)?;
+            DeCboRoaringBitmapCodec::merge_into(values, &mut vec)?;
             Ok(Cow::from(vec))
         }
     }
@@ -232,10 +232,10 @@ impl MergeFunction for MergeDeladdCboRoaringBitmaps {
 
             let mut output_deladd_obkv = KvWriterDelAdd::memory();
             let mut buffer = Vec::new();
-            CboRoaringBitmapCodec::merge_into(del_bitmaps_bytes, &mut buffer)?;
+            DeCboRoaringBitmapCodec::merge_into(del_bitmaps_bytes, &mut buffer)?;
             output_deladd_obkv.insert(DelAdd::Deletion, &buffer)?;
             buffer.clear();
-            CboRoaringBitmapCodec::merge_into(add_bitmaps_bytes, &mut buffer)?;
+            DeCboRoaringBitmapCodec::merge_into(add_bitmaps_bytes, &mut buffer)?;
             output_deladd_obkv.insert(DelAdd::Addition, &buffer)?;
             output_deladd_obkv.into_inner().map(Cow::from).map_err(Into::into)
         }
@@ -251,7 +251,7 @@ pub fn merge_deladd_cbo_roaring_bitmaps_into_cbo_roaring_bitmap<'a>(
     previous: &[u8],
     buffer: &'a mut Vec<u8>,
 ) -> Result<Option<&'a [u8]>> {
-    Ok(CboRoaringBitmapCodec::merge_deladd_into(
+    Ok(DeCboRoaringBitmapCodec::merge_deladd_into(
         KvReaderDelAdd::from_slice(deladd_obkv),
         previous,
         buffer,

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

@@ -40,7 +40,7 @@ use crate::update::{
 };
 use crate::vector::db::EmbedderInfo;
 use crate::vector::{RuntimeEmbedders, VectorStore};
-use crate::{CboRoaringBitmapCodec, Index, Result, UserError};
+use crate::{DeCboRoaringBitmapCodec, Index, Result, UserError};
 
 static MERGED_DATABASE_COUNT: usize = 7;
 static PREFIX_DATABASE_COUNT: usize = 4;
@@ -54,11 +54,12 @@ pub struct DocumentAdditionResult {
     pub number_of_documents: u64,
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
 #[non_exhaustive]
 pub enum IndexDocumentsMethod {
     /// Replace the previous document with the new one,
     /// removing all the already known attributes.
+    #[default]
     ReplaceDocuments,
 
     /// Merge the previous version of the document with the new version,
@@ -66,12 +67,6 @@ pub enum IndexDocumentsMethod {
     UpdateDocuments,
 }
 
-impl Default for IndexDocumentsMethod {
-    fn default() -> Self {
-        Self::ReplaceDocuments
-    }
-}
-
 pub struct IndexDocuments<'t, 'i, 'a, FP, FA> {
     wtxn: &'t mut heed::RwTxn<'i>,
     index: &'i Index,
@@ -769,8 +764,8 @@ where
 fn execute_word_prefix_docids(
     txn: &mut heed::RwTxn<'_>,
     merger: Merger<CursorClonableMmap, MergeDeladdCboRoaringBitmaps>,
-    word_docids_db: Database<Str, CboRoaringBitmapCodec>,
-    word_prefix_docids_db: Database<Str, CboRoaringBitmapCodec>,
+    word_docids_db: Database<Str, DeCboRoaringBitmapCodec>,
+    word_prefix_docids_db: Database<Str, DeCboRoaringBitmapCodec>,
     indexer_config: &IndexerConfig,
     new_prefix_fst_words: &[String],
     common_prefix_fst_words: &[&[String]],
@@ -806,6 +801,10 @@ mod tests {
     use crate::vector::db::IndexEmbeddingConfig;
     use crate::{all_obkv_to_json, db_snap, Filter, FilterableAttributesRule, Search, UserError};
 
+    fn no_cancel() -> bool {
+        false
+    }
+
     #[test]
     fn simple_document_replacement() {
         let index = TempIndex::new();
@@ -1985,7 +1984,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2038,7 +2037,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2057,7 +2056,7 @@ mod tests {
             primary_key,
             &document_changes,
             RuntimeEmbedders::default(),
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2127,7 +2126,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2146,7 +2145,7 @@ mod tests {
             primary_key,
             &document_changes,
             RuntimeEmbedders::default(),
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2317,7 +2316,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2333,7 +2332,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2381,7 +2380,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2397,7 +2396,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2436,7 +2435,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2452,7 +2451,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2490,7 +2489,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2506,7 +2505,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2546,7 +2545,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2562,7 +2561,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2607,7 +2606,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2623,7 +2622,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2661,7 +2660,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2677,7 +2676,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2715,7 +2714,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2731,7 +2730,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2927,7 +2926,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -2943,7 +2942,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -2988,7 +2987,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -3004,7 +3003,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )
@@ -3046,7 +3045,7 @@ mod tests {
                 &rtxn,
                 None,
                 &mut new_fields_ids_map,
-                &|| false,
+                &no_cancel,
                 Progress::default(),
                 None,
             )
@@ -3062,7 +3061,7 @@ mod tests {
             primary_key,
             &document_changes,
             embedders,
-            &|| false,
+            &no_cancel,
             &Progress::default(),
             &Default::default(),
         )

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

@@ -29,7 +29,7 @@ use crate::update::settings::InnerIndexSettingsDiff;
 use crate::vector::db::{EmbeddingStatusDelta, IndexEmbeddingConfig};
 use crate::vector::VectorStore;
 use crate::{
-    lat_lng_to_xyz, CboRoaringBitmapCodec, DocumentId, FieldId, GeoPoint, Index, InternalError,
+    lat_lng_to_xyz, DeCboRoaringBitmapCodec, DocumentId, FieldId, GeoPoint, Index, InternalError,
     Result, SerializationError, U8StrStrCodec, UserError,
 };
 
@@ -866,7 +866,7 @@ where
 #[tracing::instrument(level = "trace", skip_all, target = "indexing::write_db")]
 fn write_proximity_entries_into_database_additional_searchables<R, MF>(
     merger: Merger<R, MF>,
-    database: &heed::Database<U8StrStrCodec, CboRoaringBitmapCodec>,
+    database: &heed::Database<U8StrStrCodec, DeCboRoaringBitmapCodec>,
     wtxn: &mut RwTxn<'_>,
 ) -> Result<()>
 where
@@ -881,7 +881,7 @@ where
                 U8StrStrCodec::bytes_decode(key).map_err(heed::Error::Decoding)?;
             let data_to_insert = match KvReaderDelAdd::from_slice(value).get(DelAdd::Addition) {
                 Some(value) => {
-                    CboRoaringBitmapCodec::bytes_decode(value).map_err(heed::Error::Decoding)?
+                    DeCboRoaringBitmapCodec::bytes_decode(value).map_err(heed::Error::Decoding)?
                 }
                 None => continue,
             };

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

@@ -27,7 +27,7 @@ use crate::index::db_name;
 use crate::index::main_key::{GEO_FACETED_DOCUMENTS_IDS_KEY, GEO_RTREE_KEY};
 use crate::update::new::KvReaderFieldId;
 use crate::vector::Embedding;
-use crate::{CboRoaringBitmapCodec, DocumentId, Error, Index, InternalError};
+use crate::{DeCboRoaringBitmapCodec, DocumentId, Error, Index, InternalError};
 
 /// Note that the FrameProducer requires up to 9 bytes to
 /// encode the length, the max grant has been computed accordingly.
@@ -971,7 +971,9 @@ pub struct WordDocidsSender<'a, 'b, D> {
 
 impl<D: DatabaseType> WordDocidsSender<'_, '_, D> {
     pub fn write(&self, key: &[u8], bitmap: &RoaringBitmap) -> crate::Result<()> {
-        let value_length = CboRoaringBitmapCodec::serialized_size(bitmap);
+        let mut tmp_buffer = Vec::new();
+        let value_length =
+            DeCboRoaringBitmapCodec::serialized_size_with_tmp_buffer(bitmap, &mut tmp_buffer);
         let key_length = key.len().try_into().ok().and_then(NonZeroU16::new).ok_or_else(|| {
             InternalError::StorePut {
                 database_name: D::DATABASE.database_name(),
@@ -986,7 +988,10 @@ impl<D: DatabaseType> WordDocidsSender<'_, '_, D> {
             value_length,
             |key_buffer, value_buffer| {
                 key_buffer.copy_from_slice(key);
-                CboRoaringBitmapCodec::serialize_into_writer(bitmap, value_buffer)?;
+                DeCboRoaringBitmapCodec::serialize_into(
+                    bitmap,
+                    &mut io::Cursor::new(value_buffer),
+                )?;
                 Ok(())
             },
         )
@@ -1007,7 +1012,9 @@ impl FacetDocidsSender<'_, '_> {
         let (facet_kind, key) = FacetKind::extract_from_key(key);
         let database = Database::from(facet_kind);
 
-        let value_length = CboRoaringBitmapCodec::serialized_size(bitmap);
+        let mut tmp_buffer = Vec::new();
+        let value_length =
+            DeCboRoaringBitmapCodec::serialized_size_with_tmp_buffer(bitmap, &mut tmp_buffer);
         let value_length = match facet_kind {
             // We must take the facet group size into account
             // when we serialize strings and numbers.
@@ -1041,7 +1048,7 @@ impl FacetDocidsSender<'_, '_> {
                     FacetKind::Null | FacetKind::Empty | FacetKind::Exists => value_out,
                 };
 
-                CboRoaringBitmapCodec::serialize_into_writer(bitmap, value_out)?;
+                DeCboRoaringBitmapCodec::serialize_into(bitmap, &mut io::Cursor::new(value_out))?;
 
                 Ok(())
             },

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

@@ -82,7 +82,7 @@ use crate::update::del_add::{DelAdd, KvWriterDelAdd};
 use crate::update::new::thread_local::MostlySend;
 use crate::update::new::KvReaderDelAdd;
 use crate::update::MergeDeladdCboRoaringBitmaps;
-use crate::{CboRoaringBitmapCodec, Result};
+use crate::{DeCboRoaringBitmapCodec, Result};
 
 /// A cache that stores bytes keys associated to CboDelAddRoaringBitmaps.
 ///
@@ -323,6 +323,7 @@ struct SpillingCaches<'extractor> {
     spilled_entries: Vec<grenad::Sorter<MergeDeladdCboRoaringBitmaps>>,
     deladd_buffer: Vec<u8>,
     cbo_buffer: Vec<u8>,
+    tmp_buffer: Vec<u32>,
 }
 
 impl<'extractor> SpillingCaches<'extractor> {
@@ -348,6 +349,7 @@ impl<'extractor> SpillingCaches<'extractor> {
             caches,
             deladd_buffer: Vec::new(),
             cbo_buffer: Vec::new(),
+            tmp_buffer: Vec::new(),
         }
     }
 
@@ -370,6 +372,7 @@ impl<'extractor> SpillingCaches<'extractor> {
                 &mut self.spilled_entries[bucket],
                 &mut self.deladd_buffer,
                 &mut self.cbo_buffer,
+                &mut self.tmp_buffer,
                 key,
                 DelAddRoaringBitmap::new_del_u32(n),
             ),
@@ -395,6 +398,7 @@ impl<'extractor> SpillingCaches<'extractor> {
                 &mut self.spilled_entries[bucket],
                 &mut self.deladd_buffer,
                 &mut self.cbo_buffer,
+                &mut self.tmp_buffer,
                 key,
                 DelAddRoaringBitmap::new_add_u32(n),
             ),
@@ -411,6 +415,7 @@ fn spill_entry_to_sorter(
     spilled_entries: &mut grenad::Sorter<MergeDeladdCboRoaringBitmaps>,
     deladd_buffer: &mut Vec<u8>,
     cbo_buffer: &mut Vec<u8>,
+    tmp_buffer: &mut Vec<u32>,
     key: &[u8],
     deladd: DelAddRoaringBitmap,
 ) -> Result<()> {
@@ -420,21 +425,29 @@ fn spill_entry_to_sorter(
     match deladd {
         DelAddRoaringBitmap { del: Some(del), add: None } => {
             cbo_buffer.clear();
-            CboRoaringBitmapCodec::serialize_into_vec(&del, cbo_buffer);
+            DeCboRoaringBitmapCodec::serialize_into_with_tmp_buffer(
+                &del, cbo_buffer, tmp_buffer,
+            );
             value_writer.insert(DelAdd::Deletion, &cbo_buffer)?;
         }
         DelAddRoaringBitmap { del: None, add: Some(add) } => {
             cbo_buffer.clear();
-            CboRoaringBitmapCodec::serialize_into_vec(&add, cbo_buffer);
+            DeCboRoaringBitmapCodec::serialize_into_with_tmp_buffer(
+                &add, cbo_buffer, tmp_buffer,
+            );
             value_writer.insert(DelAdd::Addition, &cbo_buffer)?;
         }
         DelAddRoaringBitmap { del: Some(del), add: Some(add) } => {
             cbo_buffer.clear();
-            CboRoaringBitmapCodec::serialize_into_vec(&del, cbo_buffer);
+            DeCboRoaringBitmapCodec::serialize_into_with_tmp_buffer(
+                &del, cbo_buffer, tmp_buffer,
+            );
             value_writer.insert(DelAdd::Deletion, &cbo_buffer)?;
 
             cbo_buffer.clear();
-            CboRoaringBitmapCodec::serialize_into_vec(&add, cbo_buffer);
+            DeCboRoaringBitmapCodec::serialize_into_with_tmp_buffer(
+                &add, cbo_buffer, tmp_buffer,
+            );
             value_writer.insert(DelAdd::Addition, &cbo_buffer)?;
         }
         DelAddRoaringBitmap { del: None, add: None } => return Ok(()),
@@ -640,12 +653,12 @@ impl DelAddRoaringBitmap {
         let reader = KvReaderDelAdd::from_slice(bytes);
 
         let del = match reader.get(DelAdd::Deletion) {
-            Some(bytes) => CboRoaringBitmapCodec::deserialize_from(bytes).map(Some)?,
+            Some(bytes) => DeCboRoaringBitmapCodec::deserialize_from(bytes).map(Some)?,
             None => None,
         };
 
         let add = match reader.get(DelAdd::Addition) {
-            Some(bytes) => CboRoaringBitmapCodec::deserialize_from(bytes).map(Some)?,
+            Some(bytes) => DeCboRoaringBitmapCodec::deserialize_from(bytes).map(Some)?,
             None => None,
         };
 

crates/milli/src/update/new/indexer/post_processing/facet_bulk.rs

@@ -14,7 +14,7 @@ use crate::heed_codec::facet::{FacetGroupKey, FacetGroupKeyCodec, FacetGroupValu
 use crate::heed_codec::BytesRefCodec;
 use crate::update::facet::{FACET_GROUP_SIZE, FACET_MIN_LEVEL_SIZE};
 use crate::update::{create_writer, writer_into_reader};
-use crate::{CboRoaringBitmapCodec, FieldId, Index};
+use crate::{DeCboRoaringBitmapCodec, FieldId, Index};
 
 /// Generate the facet level based on the level 0.
 ///
@@ -123,7 +123,7 @@ fn compute_level(
                             ser_buffer.push(group_len);
                             let group_docids = mem::take(&mut group_docids);
                             let docids = group_docids.into_iter().union();
-                            CboRoaringBitmapCodec::serialize_into_vec(&docids, &mut ser_buffer);
+                            DeCboRoaringBitmapCodec::serialize_into(&docids, &mut ser_buffer);
                             writer.insert(left_bound, &ser_buffer)?;
                         }
                         left_bound = Some(key.left_bound);
@@ -142,7 +142,7 @@ fn compute_level(
                 let group_len: u8 = group_docids.len().try_into().unwrap();
                 ser_buffer.push(group_len);
                 let group_docids = group_docids.into_iter().union();
-                CboRoaringBitmapCodec::serialize_into_vec(&group_docids, &mut ser_buffer);
+                DeCboRoaringBitmapCodec::serialize_into(&group_docids, &mut ser_buffer);
                 writer.insert(left_bound, &ser_buffer)?;
             }
 

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

@@ -14,7 +14,7 @@ use super::extract::{
 };
 use crate::update::facet::new_incremental::FacetFieldIdChange;
 use crate::update::new::extract::cellulite::GeoJsonExtractorData;
-use crate::{CboRoaringBitmapCodec, FieldId, GeoPoint, Index, InternalError, Result};
+use crate::{DeCboRoaringBitmapCodec, FieldId, GeoPoint, Index, InternalError, Result};
 
 #[tracing::instrument(level = "trace", skip_all, target = "indexing::merge")]
 pub fn merge_and_send_rtree<'extractor, MSP>(
@@ -325,7 +325,7 @@ fn merge_cbo_bitmaps(
     del: Option<RoaringBitmap>,
     add: Option<RoaringBitmap>,
 ) -> Result<Operation> {
-    let current = current.map(CboRoaringBitmapCodec::deserialize_from).transpose()?;
+    let current = current.map(DeCboRoaringBitmapCodec::deserialize_from).transpose()?;
     match (current, del, add) {
         (None, None, None) => Ok(Operation::Ignore), // but it's strange
         (None, None, Some(add)) => Ok(Operation::Write(add)),

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

@@ -14,12 +14,12 @@ use thread_local::ThreadLocal;
 use super::ref_cell_ext::RefCellExt as _;
 use crate::heed_codec::StrBEU16Codec;
 use crate::update::GrenadParameters;
-use crate::{CboRoaringBitmapCodec, Index, Prefix, Result};
+use crate::{DeCboRoaringBitmapCodec, Index, Prefix, Result};
 
 struct WordPrefixDocids<'i> {
     index: &'i Index,
-    database: Database<Bytes, CboRoaringBitmapCodec>,
-    prefix_database: Database<Bytes, CboRoaringBitmapCodec>,
+    database: Database<Bytes, DeCboRoaringBitmapCodec>,
+    prefix_database: Database<Bytes, DeCboRoaringBitmapCodec>,
     max_memory_by_thread: Option<usize>,
     /// Do not use an experimental LMDB feature to read uncommitted data in parallel.
     no_experimental_post_processing: bool,
@@ -28,8 +28,8 @@ struct WordPrefixDocids<'i> {
 impl<'i> WordPrefixDocids<'i> {
     fn new(
         index: &'i Index,
-        database: Database<Bytes, CboRoaringBitmapCodec>,
-        prefix_database: Database<Bytes, CboRoaringBitmapCodec>,
+        database: Database<Bytes, DeCboRoaringBitmapCodec>,
+        prefix_database: Database<Bytes, DeCboRoaringBitmapCodec>,
         grenad_parameters: &GrenadParameters,
     ) -> WordPrefixDocids<'i> {
         WordPrefixDocids {
@@ -87,12 +87,12 @@ impl<'i> WordPrefixDocids<'i> {
                     let output = self
                         .database
                         .prefix_iter(&rtxn, prefix.as_bytes())?
-                        .remap_types::<Str, CboRoaringBitmapCodec>()
+                        .remap_types::<Str, DeCboRoaringBitmapCodec>()
                         .map(|result| result.map(|(_word, bitmap)| bitmap))
                         .union()?;
 
                     buffer.clear();
-                    CboRoaringBitmapCodec::serialize_into_vec(&output, &mut buffer);
+                    DeCboRoaringBitmapCodec::serialize_into(&output, &mut buffer);
                     indexes.push(PrefixEntry { prefix, serialized_length: buffer.len() });
                     file.write_all(&buffer)?;
                 }
@@ -150,11 +150,11 @@ impl<'i> WordPrefixDocids<'i> {
                 .bitmaps(prefix)
                 .unwrap()
                 .iter()
-                .map(|bytes| CboRoaringBitmapCodec::deserialize_from(bytes))
+                .map(|bytes| DeCboRoaringBitmapCodec::deserialize_from(bytes))
                 .union()?;
 
             buffer.clear();
-            CboRoaringBitmapCodec::serialize_into_vec(&output, buffer);
+            DeCboRoaringBitmapCodec::serialize_into(&output, buffer);
             index.push(PrefixEntry { prefix, serialized_length: buffer.len() });
             file.write_all(buffer)
         })?;
@@ -203,7 +203,7 @@ struct FrozenPrefixBitmaps<'a, 'rtxn> {
 impl<'a, 'rtxn> FrozenPrefixBitmaps<'a, 'rtxn> {
     #[tracing::instrument(level = "trace", skip_all, target = "indexing::prefix")]
     pub fn from_prefixes(
-        database: Database<Bytes, CboRoaringBitmapCodec>,
+        database: Database<Bytes, DeCboRoaringBitmapCodec>,
         rtxn: &'rtxn RoTxn,
         prefixes: &'a BTreeSet<Prefix>,
     ) -> heed::Result<Self> {
@@ -231,8 +231,8 @@ unsafe impl Sync for FrozenPrefixBitmaps<'_, '_> {}
 
 struct WordPrefixIntegerDocids<'i> {
     index: &'i Index,
-    database: Database<Bytes, CboRoaringBitmapCodec>,
-    prefix_database: Database<Bytes, CboRoaringBitmapCodec>,
+    database: Database<Bytes, DeCboRoaringBitmapCodec>,
+    prefix_database: Database<Bytes, DeCboRoaringBitmapCodec>,
     max_memory_by_thread: Option<usize>,
     /// Do not use an experimental LMDB feature to read uncommitted data in parallel.
     no_experimental_post_processing: bool,
@@ -241,8 +241,8 @@ struct WordPrefixIntegerDocids<'i> {
 impl<'i> WordPrefixIntegerDocids<'i> {
     fn new(
         index: &'i Index,
-        database: Database<Bytes, CboRoaringBitmapCodec>,
-        prefix_database: Database<Bytes, CboRoaringBitmapCodec>,
+        database: Database<Bytes, DeCboRoaringBitmapCodec>,
+        prefix_database: Database<Bytes, DeCboRoaringBitmapCodec>,
         grenad_parameters: &'_ GrenadParameters,
     ) -> WordPrefixIntegerDocids<'i> {
         WordPrefixIntegerDocids {
@@ -338,10 +338,10 @@ impl<'i> WordPrefixIntegerDocids<'i> {
                         } else {
                             let output = bitmaps_bytes
                                 .into_iter()
-                                .map(CboRoaringBitmapCodec::deserialize_from)
+                                .map(DeCboRoaringBitmapCodec::deserialize_from)
                                 .union()?;
                             buffer.clear();
-                            CboRoaringBitmapCodec::serialize_into_vec(&output, &mut buffer);
+                            DeCboRoaringBitmapCodec::serialize_into(&output, &mut buffer);
                             indexes.push(PrefixIntegerEntry {
                                 prefix,
                                 pos,
@@ -419,10 +419,10 @@ impl<'i> WordPrefixIntegerDocids<'i> {
                 } else {
                     let output = bitmaps_bytes
                         .iter()
-                        .map(|bytes| CboRoaringBitmapCodec::deserialize_from(bytes))
+                        .map(|bytes| DeCboRoaringBitmapCodec::deserialize_from(bytes))
                         .union()?;
                     buffer.clear();
-                    CboRoaringBitmapCodec::serialize_into_vec(&output, buffer);
+                    DeCboRoaringBitmapCodec::serialize_into(&output, buffer);
                     index.push(PrefixIntegerEntry {
                         prefix,
                         pos,
@@ -486,7 +486,7 @@ struct FrozenPrefixIntegerBitmaps<'a, 'rtxn> {
 impl<'a, 'rtxn> FrozenPrefixIntegerBitmaps<'a, 'rtxn> {
     #[tracing::instrument(level = "trace", skip_all, target = "indexing::prefix")]
     pub fn from_prefixes(
-        database: Database<Bytes, CboRoaringBitmapCodec>,
+        database: Database<Bytes, DeCboRoaringBitmapCodec>,
         rtxn: &'rtxn RoTxn,
         prefixes: &'a BTreeSet<Prefix>,
     ) -> heed::Result<Self> {
@@ -516,7 +516,7 @@ unsafe impl Sync for FrozenPrefixIntegerBitmaps<'_, '_> {}
 #[tracing::instrument(level = "trace", skip_all, target = "indexing::prefix")]
 fn delete_prefixes(
     wtxn: &mut RwTxn,
-    prefix_database: &Database<Bytes, CboRoaringBitmapCodec>,
+    prefix_database: &Database<Bytes, DeCboRoaringBitmapCodec>,
     prefixes: &BTreeSet<Prefix>,
 ) -> Result<()> {
     // We remove all the entries that are no more required in this word prefix docids database.

crates/milli/src/update/settings.rs

@@ -48,10 +48,11 @@ use crate::{
     ChannelCongestion, FieldId, FilterableAttributesRule, Index, LocalizedAttributesRule, Result,
 };
 
-#[derive(Debug, Clone, PartialEq, Eq, Copy)]
+#[derive(Default, Debug, Clone, PartialEq, Eq, Copy)]
 pub enum Setting<T> {
     Set(T),
     Reset,
+    #[default]
     NotSet,
 }
 
@@ -71,12 +72,6 @@ where
     }
 }
 
-impl<T> Default for Setting<T> {
-    fn default() -> Self {
-        Self::NotSet
-    }
-}
-
 impl<T> Setting<T> {
     pub fn set(self) -> Option<T> {
         match self {

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

@@ -5,103 +5,36 @@ mod v1_15;
 mod v1_16;
 
 use heed::RwTxn;
-use v1_12::{V1_12_3_To_V1_13_0, V1_12_To_V1_12_3};
-use v1_13::{V1_13_0_To_V1_13_1, V1_13_1_To_Latest_V1_13};
-use v1_14::Latest_V1_13_To_Latest_V1_14;
-use v1_15::Latest_V1_14_To_Latest_V1_15;
-use v1_16::Latest_V1_15_To_V1_16_0;
+use v1_12::{FixFieldDistribution, RecomputeStats};
+use v1_13::AddNewStats;
+use v1_14::UpgradeArroyVersion;
+use v1_15::RecomputeWordFst;
+use v1_16::SwitchToMultimodal;
 
 use crate::constants::{VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH};
 use crate::progress::{Progress, VariableNameStep};
 use crate::{Index, InternalError, Result};
 
 trait UpgradeIndex {
+    /// Returns `true` if `upgrade` should be called when the index started with version `initial_version`.
+    fn must_upgrade(&self, initial_version: (u32, u32, u32)) -> bool;
+
     /// Returns `true` if the index scheduler must regenerate its cached stats.
-    fn upgrade(
-        &self,
-        wtxn: &mut RwTxn,
-        index: &Index,
-        original: (u32, u32, u32),
-        progress: Progress,
-    ) -> Result<bool>;
-    fn target_version(&self) -> (u32, u32, u32);
+    fn upgrade(&self, wtxn: &mut RwTxn, index: &Index, progress: Progress) -> Result<bool>;
+
+    /// Description of the upgrade for progress display purposes.
+    fn description(&self) -> &'static str;
 }
 
 const UPGRADE_FUNCTIONS: &[&dyn UpgradeIndex] = &[
-    &V1_12_To_V1_12_3 {},
-    &V1_12_3_To_V1_13_0 {},
-    &V1_13_0_To_V1_13_1 {},
-    &V1_13_1_To_Latest_V1_13 {},
-    &Latest_V1_13_To_Latest_V1_14 {},
-    &Latest_V1_14_To_Latest_V1_15 {},
-    &Latest_V1_15_To_V1_16_0 {},
-    &ToTargetNoOp { target: (1, 18, 0) },
-    &ToTargetNoOp { target: (1, 19, 0) },
-    &ToTargetNoOp { target: (1, 20, 0) },
-    &ToTargetNoOp { target: (1, 21, 0) },
-    &ToTargetNoOp { target: (1, 22, 0) },
-    &ToTargetNoOp { target: (1, 23, 0) },
-    &ToTargetNoOp { target: (1, 24, 0) },
-    &ToTargetNoOp { target: (1, 25, 0) },
-    &ToTargetNoOp { target: (1, 26, 0) },
-    &ToTargetNoOp { target: (1, 27, 0) },
-    &ToTargetNoOp { target: (1, 28, 0) },
-    // This is the last upgrade function, it will be called when the index is up to date.
-    // any other upgrade function should be added before this one.
-    &ToCurrentNoOp {},
+    &FixFieldDistribution {},
+    &RecomputeStats {},
+    &AddNewStats {},
+    &UpgradeArroyVersion {},
+    &RecomputeWordFst {},
+    &SwitchToMultimodal {},
 ];
 
-/// Causes a compile-time error if the argument is not in range of `0..UPGRADE_FUNCTIONS.len()`
-macro_rules! function_index {
-    ($start:expr) => {{
-        const _CHECK_INDEX: () = {
-            if $start >= $crate::update::upgrade::UPGRADE_FUNCTIONS.len() {
-                panic!("upgrade functions out of range")
-            }
-        };
-
-        $start
-    }};
-}
-
-const fn start(from: (u32, u32, u32)) -> Option<usize> {
-    let start = match from {
-        (1, 12, 0..=2) => function_index!(0),
-        (1, 12, 3..) => function_index!(1),
-        (1, 13, 0) => function_index!(2),
-        (1, 13, _) => function_index!(4),
-        (1, 14, _) => function_index!(5),
-        // We must handle the current version in the match because in case of a failure some index may have been upgraded but not other.
-        (1, 15, _) => function_index!(6),
-        (1, 16, _) | (1, 17, _) => function_index!(7),
-        (1, 18, _) => function_index!(8),
-        (1, 19, _) => function_index!(9),
-        (1, 20, _) => function_index!(10),
-        (1, 21, _) => function_index!(11),
-        (1, 22, _) => function_index!(12),
-        (1, 23, _) => function_index!(13),
-        (1, 24, _) => function_index!(14),
-        (1, 25, _) => function_index!(15),
-        (1, 26, _) => function_index!(16),
-        (1, 27, _) => function_index!(17),
-        (1, 28, _) => function_index!(18),
-        // We deliberately don't add a placeholder with (VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH) here to force manually
-        // considering dumpless upgrade.
-        (_major, _minor, _patch) => return None,
-    };
-
-    Some(start)
-}
-
-/// Causes a compile-time error if the latest package cannot be upgraded.
-///
-/// This serves as a reminder to consider the proper dumpless upgrade implementation when changing the package version.
-const _CHECK_PACKAGE_CAN_UPGRADE: () = {
-    if start((VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH)).is_none() {
-        panic!("cannot upgrade from latest package version")
-    }
-};
-
 /// Return true if the cached stats of the index must be regenerated
 pub fn upgrade<MSP>(
     wtxn: &mut RwTxn,
@@ -113,79 +46,34 @@ pub fn upgrade<MSP>(
 where
     MSP: Fn() -> bool + Sync,
 {
-    let from = index.get_version(wtxn)?.unwrap_or(db_version);
+    let upgrade_functions = UPGRADE_FUNCTIONS;
 
-    let start =
-        start(from).ok_or_else(|| InternalError::CannotUpgradeToVersion(from.0, from.1, from.2))?;
+    let initial_version = index.get_version(wtxn)?.unwrap_or(db_version);
 
     enum UpgradeVersion {}
-    let upgrade_path = &UPGRADE_FUNCTIONS[start..];
 
-    let mut current_version = from;
     let mut regenerate_stats = false;
-    for (i, upgrade) in upgrade_path.iter().enumerate() {
+    for (i, upgrade) in upgrade_functions.iter().enumerate() {
         if (must_stop_processing)() {
             return Err(crate::Error::InternalError(InternalError::AbortedIndexation));
         }
-        let target = upgrade.target_version();
+        if upgrade.must_upgrade(initial_version) {
+            regenerate_stats |= upgrade.upgrade(wtxn, index, progress.clone())?;
             progress.update_progress(VariableNameStep::<UpgradeVersion>::new(
-            format!(
-                "Upgrading from v{}.{}.{} to v{}.{}.{}",
-                current_version.0,
-                current_version.1,
-                current_version.2,
-                target.0,
-                target.1,
-                target.2
-            ),
+                upgrade.description(),
                 i as u32,
-            upgrade_path.len() as u32,
+                upgrade_functions.len() as u32,
+            ));
+        } else {
+            progress.update_progress(VariableNameStep::<UpgradeVersion>::new(
+                "Skipping migration that must not be applied",
+                i as u32,
+                upgrade_functions.len() as u32,
             ));
-        regenerate_stats |= upgrade.upgrade(wtxn, index, from, progress.clone())?;
-        index.put_version(wtxn, target)?;
-        current_version = target;
         }
+    }
+
+    index.put_version(wtxn, (VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH))?;
 
     Ok(regenerate_stats)
 }
-
-#[allow(non_camel_case_types)]
-struct ToCurrentNoOp {}
-
-impl UpgradeIndex for ToCurrentNoOp {
-    fn upgrade(
-        &self,
-        _wtxn: &mut RwTxn,
-        _index: &Index,
-        _original: (u32, u32, u32),
-        _progress: Progress,
-    ) -> Result<bool> {
-        Ok(false)
-    }
-
-    fn target_version(&self) -> (u32, u32, u32) {
-        (VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH)
-    }
-}
-
-/// Perform no operation during the upgrade except changing to the specified target version.
-#[allow(non_camel_case_types)]
-struct ToTargetNoOp {
-    pub target: (u32, u32, u32),
-}
-
-impl UpgradeIndex for ToTargetNoOp {
-    fn upgrade(
-        &self,
-        _wtxn: &mut RwTxn,
-        _index: &Index,
-        _original: (u32, u32, u32),
-        _progress: Progress,
-    ) -> Result<bool> {
-        Ok(false)
-    }
-
-    fn target_version(&self) -> (u32, u32, u32) {
-        self.target
-    }
-}

crates/milli/src/update/upgrade/v1_12.rs

@@ -4,17 +4,10 @@ use super::UpgradeIndex;
 use crate::progress::Progress;
 use crate::{make_enum_progress, Index, Result};
 
-#[allow(non_camel_case_types)]
-pub(super) struct V1_12_To_V1_12_3 {}
+pub(super) struct FixFieldDistribution {}
 
-impl UpgradeIndex for V1_12_To_V1_12_3 {
-    fn upgrade(
-        &self,
-        wtxn: &mut RwTxn,
-        index: &Index,
-        _original: (u32, u32, u32),
-        progress: Progress,
-    ) -> Result<bool> {
+impl UpgradeIndex for FixFieldDistribution {
+    fn upgrade(&self, wtxn: &mut RwTxn, index: &Index, progress: Progress) -> Result<bool> {
         make_enum_progress! {
             enum FieldDistribution {
                 RebuildingFieldDistribution,
@@ -25,27 +18,28 @@ impl UpgradeIndex for V1_12_To_V1_12_3 {
         Ok(true)
     }
 
-    fn target_version(&self) -> (u32, u32, u32) {
-        (1, 12, 3)
+    fn must_upgrade(&self, initial_version: (u32, u32, u32)) -> bool {
+        initial_version < (1, 12, 3)
+    }
+
+    fn description(&self) -> &'static str {
+        "Recomputing field distribution which was wrong before v1.12.3"
     }
 }
 
-#[allow(non_camel_case_types)]
-pub(super) struct V1_12_3_To_V1_13_0 {}
+pub(super) struct RecomputeStats {}
 
-impl UpgradeIndex for V1_12_3_To_V1_13_0 {
-    fn upgrade(
-        &self,
-        _wtxn: &mut RwTxn,
-        _index: &Index,
-        _original: (u32, u32, u32),
-        _progress: Progress,
-    ) -> Result<bool> {
+impl UpgradeIndex for RecomputeStats {
+    fn upgrade(&self, _wtxn: &mut RwTxn, _index: &Index, _progress: Progress) -> Result<bool> {
         // recompute the indexes stats
         Ok(true)
     }
 
-    fn target_version(&self) -> (u32, u32, u32) {
-        (1, 13, 0)
+    fn must_upgrade(&self, initial_version: (u32, u32, u32)) -> bool {
+        initial_version < (1, 13, 0)
+    }
+
+    fn description(&self) -> &'static str {
+        "Recomputing stats"
     }
 }

crates/milli/src/update/upgrade/v1_13.rs

@@ -5,17 +5,10 @@ use crate::database_stats::DatabaseStats;
 use crate::progress::Progress;
 use crate::{make_enum_progress, Index, Result};
 
-#[allow(non_camel_case_types)]
-pub(super) struct V1_13_0_To_V1_13_1();
+pub(super) struct AddNewStats();
 
-impl UpgradeIndex for V1_13_0_To_V1_13_1 {
-    fn upgrade(
-        &self,
-        wtxn: &mut RwTxn,
-        index: &Index,
-        _original: (u32, u32, u32),
-        progress: Progress,
-    ) -> Result<bool> {
+impl UpgradeIndex for AddNewStats {
+    fn upgrade(&self, wtxn: &mut RwTxn, index: &Index, progress: Progress) -> Result<bool> {
         make_enum_progress! {
             enum DocumentsStats {
                 CreatingDocumentsStats,
@@ -30,26 +23,11 @@ impl UpgradeIndex for V1_13_0_To_V1_13_1 {
         Ok(true)
     }
 
-    fn target_version(&self) -> (u32, u32, u32) {
-        (1, 13, 1)
-    }
+    fn must_upgrade(&self, initial_version: (u32, u32, u32)) -> bool {
+        initial_version < (1, 13, 1)
     }
 
-#[allow(non_camel_case_types)]
-pub(super) struct V1_13_1_To_Latest_V1_13();
-
-impl UpgradeIndex for V1_13_1_To_Latest_V1_13 {
-    fn upgrade(
-        &self,
-        _wtxn: &mut RwTxn,
-        _index: &Index,
-        _original: (u32, u32, u32),
-        _progress: Progress,
-    ) -> Result<bool> {
-        Ok(false)
-    }
-
-    fn target_version(&self) -> (u32, u32, u32) {
-        (1, 13, 3)
+    fn description(&self) -> &'static str {
+        "Computing newly introduced document stats"
     }
 }

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

@@ -5,17 +5,10 @@ use super::UpgradeIndex;
 use crate::progress::Progress;
 use crate::{make_enum_progress, Index, Result};
 
-#[allow(non_camel_case_types)]
-pub(super) struct Latest_V1_13_To_Latest_V1_14();
+pub(super) struct UpgradeArroyVersion();
 
-impl UpgradeIndex for Latest_V1_13_To_Latest_V1_14 {
-    fn upgrade(
-        &self,
-        wtxn: &mut RwTxn,
-        index: &Index,
-        _original: (u32, u32, u32),
-        progress: Progress,
-    ) -> Result<bool> {
+impl UpgradeIndex for UpgradeArroyVersion {
+    fn upgrade(&self, wtxn: &mut RwTxn, index: &Index, progress: Progress) -> Result<bool> {
         make_enum_progress! {
             enum VectorStore {
                 UpdateInternalVersions,
@@ -35,7 +28,11 @@ impl UpgradeIndex for Latest_V1_13_To_Latest_V1_14 {
         Ok(false)
     }
 
-    fn target_version(&self) -> (u32, u32, u32) {
-        (1, 14, 0)
+    fn must_upgrade(&self, initial_version: (u32, u32, u32)) -> bool {
+        initial_version < (1, 14, 0)
+    }
+
+    fn description(&self) -> &'static str {
+        "Updating vector store with an internal version"
     }
 }