Introduce a new CLI and env var to use the old document indexer when

importing dumps

crates/index-scheduler/src/lib.rs

@@ -139,6 +139,8 @@ pub struct IndexSchedulerOptions {
     pub embedding_cache_cap: usize,
     /// Snapshot compaction status.
     pub experimental_no_snapshot_compaction: bool,
+    /// Whether dump import use the old document indexer or the new one.
+    pub experimental_no_edition_2024_for_dumps: bool,
 }
 
 /// Structure which holds meilisearch's indexes and schedules the tasks
@@ -168,6 +170,9 @@ pub struct IndexScheduler {
     /// Whether we should automatically cleanup the task queue or not.
     pub(crate) cleanup_enabled: bool,
 
+    /// Whether we should use the old document indexer or the new one.
+    pub(crate) experimental_no_edition_2024_for_dumps: bool,
+
     /// The webhook url we should send tasks to after processing every batches.
     pub(crate) webhook_url: Option<String>,
     /// The Authorization header to send to the webhook URL.
@@ -210,6 +215,7 @@ impl IndexScheduler {
 
             index_mapper: self.index_mapper.clone(),
             cleanup_enabled: self.cleanup_enabled,
+            experimental_no_edition_2024_for_dumps: self.experimental_no_edition_2024_for_dumps,
             webhook_url: self.webhook_url.clone(),
             webhook_authorization_header: self.webhook_authorization_header.clone(),
             embedders: self.embedders.clone(),
@@ -296,6 +302,7 @@ impl IndexScheduler {
             index_mapper,
             env,
             cleanup_enabled: options.cleanup_enabled,
+            experimental_no_edition_2024_for_dumps: options.experimental_no_edition_2024_for_dumps,
             webhook_url: options.webhook_url,
             webhook_authorization_header: options.webhook_authorization_header,
             embedders: Default::default(),
@@ -594,6 +601,11 @@ impl IndexScheduler {
         Ok(nbr_index_processing_tasks > 0)
     }
 
+    /// Whether the index should use the old document indexer.
+    pub fn no_edition_2024_for_dumps(&self) -> bool {
+        self.experimental_no_edition_2024_for_dumps
+    }
+
     /// Return the tasks matching the query from the user's point of view along
     /// with the total number of tasks matching the query, ignoring from and limit.
     ///

crates/meilisearch/src/analytics/segment_analytics.rs

@@ -203,6 +203,7 @@ struct Infos {
     experimental_composite_embedders: bool,
     experimental_embedding_cache_entries: usize,
     experimental_no_snapshot_compaction: bool,
+    experimental_no_edition_2024_for_dumps: bool,
     experimental_no_edition_2024_for_settings: bool,
     gpu_enabled: bool,
     db_path: bool,
@@ -253,6 +254,7 @@ impl Infos {
             experimental_limit_batched_tasks_total_size,
             experimental_embedding_cache_entries,
             experimental_no_snapshot_compaction,
+            experimental_no_edition_2024_for_dumps,
             http_addr,
             master_key: _,
             env,
@@ -329,6 +331,7 @@ impl Infos {
             experimental_composite_embedders: composite_embedders,
             experimental_embedding_cache_entries,
             experimental_no_snapshot_compaction,
+            experimental_no_edition_2024_for_dumps,
             gpu_enabled: meilisearch_types::milli::vector::is_cuda_enabled(),
             db_path: db_path != PathBuf::from("./data.ms"),
             import_dump: import_dump.is_some(),

crates/meilisearch/src/lib.rs

@@ -238,6 +238,7 @@ pub fn setup_meilisearch(opt: &Opt) -> anyhow::Result<(Arc<IndexScheduler>, Arc<
         auto_upgrade: opt.experimental_dumpless_upgrade,
         embedding_cache_cap: opt.experimental_embedding_cache_entries,
         experimental_no_snapshot_compaction: opt.experimental_no_snapshot_compaction,
+        experimental_no_edition_2024_for_dumps: opt.experimental_no_edition_2024_for_dumps,
     };
     let binary_version = (VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH);
 
@@ -553,6 +554,7 @@ fn import_dump(
         let embedder_stats: Arc<EmbedderStats> = Default::default();
         builder.execute(&|| false, &progress, embedder_stats.clone())?;
 
+        if index_scheduler.no_edition_2024_for_dumps() {
             // 5.3 Import the documents.
             // 5.3.1 We need to recreate the grenad+obkv format accepted by the index.
             tracing::info!("Importing the documents.");
@@ -591,9 +593,12 @@ fn import_dump(
             let user_result = user_result?;
             tracing::info!(documents_found = user_result, "{} documents found.", user_result);
             builder.execute()?;
+        } else {
+            unimplemented!("new document indexer when importing dumps");
+        }
+
         wtxn.commit()?;
         tracing::info!("All documents successfully imported.");
-
         index_scheduler.refresh_index_stats(&uid)?;
     }
 

crates/meilisearch/src/option.rs

@@ -68,6 +68,8 @@ const MEILI_EXPERIMENTAL_LIMIT_BATCHED_TASKS_TOTAL_SIZE: &str =
 const MEILI_EXPERIMENTAL_EMBEDDING_CACHE_ENTRIES: &str =
     "MEILI_EXPERIMENTAL_EMBEDDING_CACHE_ENTRIES";
 const MEILI_EXPERIMENTAL_NO_SNAPSHOT_COMPACTION: &str = "MEILI_EXPERIMENTAL_NO_SNAPSHOT_COMPACTION";
+const MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_DUMPS: &str =
+    "MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_DUMPS";
 const DEFAULT_CONFIG_FILE_PATH: &str = "./config.toml";
 const DEFAULT_DB_PATH: &str = "./data.ms";
 const DEFAULT_HTTP_ADDR: &str = "localhost:7700";
@@ -467,6 +469,15 @@ pub struct Opt {
     #[serde(default)]
     pub experimental_no_snapshot_compaction: bool,
 
+    /// Experimental make dump imports use the old document indexer.
+    ///
+    /// When enabled, Meilisearch will use the old document indexer when importing dumps.
+    ///
+    /// For more information, see <https://github.com/orgs/meilisearch/discussions/851>.
+    #[clap(long, env = MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_DUMPS)]
+    #[serde(default)]
+    pub experimental_no_edition_2024_for_dumps: bool,
+
     #[serde(flatten)]
     #[clap(flatten)]
     pub indexer_options: IndexerOpts,
@@ -572,6 +583,7 @@ impl Opt {
             experimental_limit_batched_tasks_total_size,
             experimental_embedding_cache_entries,
             experimental_no_snapshot_compaction,
+            experimental_no_edition_2024_for_dumps,
         } = self;
         export_to_env_if_not_present(MEILI_DB_PATH, db_path);
         export_to_env_if_not_present(MEILI_HTTP_ADDR, http_addr);
@@ -672,6 +684,10 @@ impl Opt {
             MEILI_EXPERIMENTAL_NO_SNAPSHOT_COMPACTION,
             experimental_no_snapshot_compaction.to_string(),
         );
+        export_to_env_if_not_present(
+            MEILI_EXPERIMENTAL_NO_EDITION_2024_FOR_DUMPS,
+            experimental_no_edition_2024_for_dumps.to_string(),
+        );
         indexer_options.export_to_env();
     }