Vectors

index-scheduler/src/batch.rs

@@ -1300,6 +1300,8 @@ impl IndexScheduler {
 
                 let mut content_files_iter = content_files.iter();
                 let mut indexer = indexer::DocumentOperation::new(method);
+                let embedders = index.embedding_configs(index_wtxn)?;
+                let embedders = self.embedders(embedders)?;
                 for (operation, task) in operations.into_iter().zip(tasks.iter_mut()) {
                     match operation {
                         DocumentOperation::Add(_content_uuid) => {
@@ -1374,6 +1376,7 @@ impl IndexScheduler {
                         primary_key_has_been_set.then_some(primary_key),
                         &pool,
                         &document_changes,
+                        embedders,
                     )?;
 
                     // tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
@@ -1460,6 +1463,8 @@ impl IndexScheduler {
 
                     let indexer = UpdateByFunction::new(candidates, context.clone(), code.clone());
                     let document_changes = indexer.into_changes(&primary_key)?;
+                    let embedders = index.embedding_configs(index_wtxn)?;
+                    let embedders = self.embedders(embedders)?;
 
                     indexer::index(
                         index_wtxn,
@@ -1469,6 +1474,7 @@ impl IndexScheduler {
                         None, // cannot change primary key in DocumentEdition
                         &pool,
                         &document_changes,
+                        embedders,
                     )?;
 
                     // tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");
@@ -1596,6 +1602,8 @@ impl IndexScheduler {
                     let mut indexer = indexer::DocumentDeletion::new();
                     indexer.delete_documents_by_docids(to_delete);
                     let document_changes = indexer.into_changes(&indexer_alloc, primary_key);
+                    let embedders = index.embedding_configs(index_wtxn)?;
+                    let embedders = self.embedders(embedders)?;
 
                     indexer::index(
                         index_wtxn,
@@ -1605,6 +1613,7 @@ impl IndexScheduler {
                         None, // document deletion never changes primary key
                         &pool,
                         &document_changes,
+                        embedders,
                     )?;
 
                     // tracing::info!(indexing_result = ?addition, processed_in = ?started_processing_at.elapsed(), "document indexing done");

milli/src/update/new/channel.rs

@@ -3,6 +3,7 @@ use std::marker::PhantomData;
 
 use crossbeam_channel::{IntoIter, Receiver, SendError, Sender};
 use grenad::Merger;
+use hashbrown::HashMap;
 use heed::types::Bytes;
 use memmap2::Mmap;
 use roaring::RoaringBitmap;
@@ -124,7 +125,32 @@ impl DocumentDeletionEntry {
     }
 }
 
-pub struct WriterOperation {
+pub enum WriterOperation {
+    DbOperation(DbOperation),
+    ArroyOperation(ArroyOperation),
+}
+
+pub enum ArroyOperation {
+    /// TODO: call when deleting regular documents
+    DeleteVectors {
+        docid: DocumentId,
+    },
+    SetVectors {
+        docid: DocumentId,
+        embedder_id: u8,
+        embeddings: Vec<Embedding>,
+    },
+    SetVector {
+        docid: DocumentId,
+        embedder_id: u8,
+        embedding: Embedding,
+    },
+    Finish {
+        user_provided: HashMap<String, RoaringBitmap>,
+    },
+}
+
+pub struct DbOperation {
     database: Database,
     entry: EntryOperation,
 }
@@ -180,7 +206,7 @@ impl From<FacetKind> for Database {
     }
 }
 
-impl WriterOperation {
+impl DbOperation {
     pub fn database(&self, index: &Index) -> heed::Database<Bytes, Bytes> {
         self.database.database(index)
     }
@@ -246,13 +272,13 @@ impl MergerSender {
             DOCUMENTS_IDS_KEY.as_bytes(),
             documents_ids,
         ));
-        match self.send(WriterOperation { database: Database::Main, entry }) {
+        match self.send_db_operation(DbOperation { database: Database::Main, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
     }
 
-    fn send(&self, op: WriterOperation) -> StdResult<(), SendError<()>> {
+    fn send_db_operation(&self, op: DbOperation) -> StdResult<(), SendError<()>> {
         if self.sender.is_full() {
             self.writer_contentious_count.set(self.writer_contentious_count.get() + 1);
         }
@@ -260,7 +286,7 @@ impl MergerSender {
             self.merger_contentious_count.set(self.merger_contentious_count.get() + 1);
         }
         self.send_count.set(self.send_count.get() + 1);
-        match self.sender.send(op) {
+        match self.sender.send(WriterOperation::DbOperation(op)) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -275,7 +301,7 @@ impl MainSender<'_> {
             WORDS_FST_KEY.as_bytes(),
             value,
         ));
-        match self.0.send(WriterOperation { database: Database::Main, entry }) {
+        match self.0.send_db_operation(DbOperation { database: Database::Main, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -286,7 +312,7 @@ impl MainSender<'_> {
             WORDS_PREFIXES_FST_KEY.as_bytes(),
             value,
         ));
-        match self.0.send(WriterOperation { database: Database::Main, entry }) {
+        match self.0.send_db_operation(DbOperation { database: Database::Main, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -294,7 +320,7 @@ impl MainSender<'_> {
 
     pub fn delete(&self, key: &[u8]) -> StdResult<(), SendError<()>> {
         let entry = EntryOperation::Delete(KeyEntry::from_key(key));
-        match self.0.send(WriterOperation { database: Database::Main, entry }) {
+        match self.0.send_db_operation(DbOperation { database: Database::Main, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -396,7 +422,7 @@ pub struct WordDocidsSender<'a, D> {
 impl<D: DatabaseType> DocidsSender for WordDocidsSender<'_, D> {
     fn write(&self, key: &[u8], value: &[u8]) -> StdResult<(), SendError<()>> {
         let entry = EntryOperation::Write(KeyValueEntry::from_small_key_value(key, value));
-        match self.sender.send(WriterOperation { database: D::DATABASE, entry }) {
+        match self.sender.send_db_operation(DbOperation { database: D::DATABASE, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -404,7 +430,7 @@ impl<D: DatabaseType> DocidsSender for WordDocidsSender<'_, D> {
 
     fn delete(&self, key: &[u8]) -> StdResult<(), SendError<()>> {
         let entry = EntryOperation::Delete(KeyEntry::from_key(key));
-        match self.sender.send(WriterOperation { database: D::DATABASE, entry }) {
+        match self.sender.send_db_operation(DbOperation { database: D::DATABASE, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -429,7 +455,7 @@ impl DocidsSender for FacetDocidsSender<'_> {
             }
             _ => EntryOperation::Write(KeyValueEntry::from_small_key_value(key, value)),
         };
-        match self.sender.send(WriterOperation { database, entry }) {
+        match self.sender.send_db_operation(DbOperation { database, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -439,7 +465,7 @@ impl DocidsSender for FacetDocidsSender<'_> {
         let (facet_kind, key) = FacetKind::extract_from_key(key);
         let database = Database::from(facet_kind);
         let entry = EntryOperation::Delete(KeyEntry::from_key(key));
-        match self.sender.send(WriterOperation { database, entry }) {
+        match self.sender.send_db_operation(DbOperation { database, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -460,7 +486,7 @@ impl DocumentsSender<'_> {
             &docid.to_be_bytes(),
             document.as_bytes(),
         ));
-        match self.0.send(WriterOperation { database: Database::Documents, entry }) {
+        match self.0.send_db_operation(DbOperation { database: Database::Documents, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }?;
@@ -469,7 +495,10 @@ impl DocumentsSender<'_> {
             external_id.as_bytes(),
             &docid.to_be_bytes(),
         ));
-        match self.0.send(WriterOperation { database: Database::ExternalDocumentsIds, entry }) {
+        match self
+            .0
+            .send_db_operation(DbOperation { database: Database::ExternalDocumentsIds, entry })
+        {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
@@ -477,33 +506,38 @@ impl DocumentsSender<'_> {
 
     pub fn delete(&self, docid: DocumentId, external_id: String) -> StdResult<(), SendError<()>> {
         let entry = EntryOperation::Delete(KeyEntry::from_key(&docid.to_be_bytes()));
-        match self.0.send(WriterOperation { database: Database::Documents, entry }) {
+        match self.0.send_db_operation(DbOperation { database: Database::Documents, entry }) {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }?;
 
         let entry = EntryOperation::Delete(KeyEntry::from_key(external_id.as_bytes()));
-        match self.0.send(WriterOperation { database: Database::ExternalDocumentsIds, entry }) {
+        match self
+            .0
+            .send_db_operation(DbOperation { database: Database::ExternalDocumentsIds, entry })
+        {
             Ok(()) => Ok(()),
             Err(SendError(_)) => Err(SendError(())),
         }
     }
 }
 
-pub struct EmbeddingSender<'a>(Option<&'a Sender<MergerOperation>>);
+pub struct EmbeddingSender<'a>(&'a Sender<WriterOperation>);
 
 impl EmbeddingSender<'_> {
-    pub fn delete(&self, docid: DocumentId, embedder_id: u8) -> StdResult<(), SendError<()>> {
-        todo!()
-    }
-
     pub fn set_vectors(
         &self,
         docid: DocumentId,
         embedder_id: u8,
         embeddings: Vec<Embedding>,
     ) -> StdResult<(), SendError<()>> {
-        todo!()
+        self.0
+            .send(WriterOperation::ArroyOperation(ArroyOperation::SetVectors {
+                docid,
+                embedder_id,
+                embeddings,
+            }))
+            .map_err(|_| SendError(()))
     }
 
     pub fn set_vector(
@@ -512,19 +546,24 @@ impl EmbeddingSender<'_> {
         embedder_id: u8,
         embedding: Embedding,
     ) -> StdResult<(), SendError<()>> {
-        todo!()
+        self.0
+            .send(WriterOperation::ArroyOperation(ArroyOperation::SetVector {
+                docid,
+                embedder_id,
+                embedding,
+            }))
+            .map_err(|_| SendError(()))
     }
 
-    pub fn set_user_provided(
+    /// Marks all embedders as "to be built"
-        &self,
+    pub fn finish(
-        docid: DocumentId,
+        self,
-        embedder_id: u8,
+        user_provided: HashMap<String, RoaringBitmap>,
-        regenerate: bool,
     ) -> StdResult<(), SendError<()>> {
-        todo!()
+        self.0
+            .send(WriterOperation::ArroyOperation(ArroyOperation::Finish { user_provided }))
+            .map_err(|_| SendError(()))
     }
-
-    pub fn finish(self, embedder_id: u8) {}
 }
 pub enum MergerOperation {
     ExactWordDocidsMerger(Merger<File, MergeDeladdCboRoaringBitmaps>),

milli/src/update/new/document.rs

@@ -4,7 +4,7 @@ use heed::RoTxn;
 use raw_collections::RawMap;
 use serde_json::value::RawValue;
 
-use super::vector_document::{VectorDocument, VectorDocumentFromDb, VectorDocumentFromVersions};
+use super::vector_document::VectorDocument;
 use super::{KvReaderFieldId, KvWriterFieldId};
 use crate::documents::FieldIdMapper;
 use crate::vector::parsed_vectors::RESERVED_VECTORS_FIELD_NAME;

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

@@ -267,7 +267,7 @@ impl Stats {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct DelAddRoaringBitmap {
     pub(crate) del: Option<RoaringBitmap>,
     pub(crate) add: Option<RoaringBitmap>,

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

@@ -11,6 +11,7 @@ use bumpalo::Bump;
 pub use faceted::*;
 use grenad::Merger;
 pub use searchable::*;
+pub use vectors::EmbeddingExtractor;
 
 use super::indexer::document_changes::{DocumentChanges, FullySend, IndexingContext, ThreadLocal};
 use crate::update::{GrenadParameters, MergeDeladdCboRoaringBitmaps};

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

@@ -1,3 +1,10 @@
+use std::cell::RefCell;
+
+use bumpalo::collections::Vec as BVec;
+use bumpalo::Bump;
+use hashbrown::HashMap;
+
+use super::cache::DelAddRoaringBitmap;
 use crate::error::FaultSource;
 use crate::prompt::Prompt;
 use crate::update::new::channel::EmbeddingSender;
@@ -5,26 +12,34 @@ use crate::update::new::indexer::document_changes::{Extractor, FullySend};
 use crate::update::new::vector_document::VectorDocument;
 use crate::update::new::DocumentChange;
 use crate::vector::error::EmbedErrorKind;
-use crate::vector::Embedder;
+use crate::vector::{Embedder, Embedding, EmbeddingConfigs};
-use crate::{DocumentId, Result, ThreadPoolNoAbort, UserError};
+use crate::{DocumentId, InternalError, Result, ThreadPoolNoAbort, UserError};
 
 pub struct EmbeddingExtractor<'a> {
-    embedder: &'a Embedder,
+    embedders: &'a EmbeddingConfigs,
-    prompt: &'a Prompt,
-    embedder_id: u8,
-    embedder_name: &'a str,
     sender: &'a EmbeddingSender<'a>,
     threads: &'a ThreadPoolNoAbort,
 }
 
+impl<'a> EmbeddingExtractor<'a> {
+    pub fn new(
+        embedders: &'a EmbeddingConfigs,
+        sender: &'a EmbeddingSender<'a>,
+        threads: &'a ThreadPoolNoAbort,
+    ) -> Self {
+        Self { embedders, sender, threads }
+    }
+}
+
 impl<'a, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a> {
-    type Data = FullySend<()>;
+    type Data = FullySend<RefCell<HashMap<String, DelAddRoaringBitmap>>>;
 
     fn init_data<'doc>(
         &'doc self,
         _extractor_alloc: raw_collections::alloc::RefBump<'extractor>,
     ) -> crate::Result<Self::Data> {
-        Ok(FullySend(()))
+        /// TODO: use the extractor_alloc in the hashbrown once you merge the branch where it is no longer a RefBump
+        Ok(FullySend(Default::default()))
     }
 
     fn process<'doc>(
@@ -34,63 +49,90 @@ impl<'a, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a> {
             Self::Data,
         >,
     ) -> crate::Result<()> {
-        let embedder_name: &str = self.embedder_name;
+        let embedders = self.embedders.inner_as_ref();
-        let embedder: &Embedder = self.embedder;
-        let prompt: &Prompt = self.prompt;
 
-        let mut chunks = Chunks::new(
+        let mut all_chunks = BVec::with_capacity_in(embedders.len(), &context.doc_alloc);
-            embedder,
+        for (embedder_name, (embedder, prompt, _is_quantized)) in embedders {
-            self.embedder_id,
+            let embedder_id =
-            embedder_name,
+                context.index.embedder_category_id.get(&context.txn, embedder_name)?.ok_or_else(
-            self.threads,
+                    || InternalError::DatabaseMissingEntry {
-            self.sender,
+                        db_name: "embedder_category_id",
-            &context.doc_alloc,
+                        key: None,
-        );
+                    },
+                )?;
+            all_chunks.push(Chunks::new(
+                embedder,
+                embedder_id,
+                embedder_name,
+                prompt,
+                &context.data.0,
+                self.threads,
+                self.sender,
+                &context.doc_alloc,
+            ))
+        }
 
         for change in changes {
             let change = change?;
             match change {
-                DocumentChange::Deletion(deletion) => {
+                DocumentChange::Deletion(_deletion) => {
-                    self.sender.delete(deletion.docid(), self.embedder_id).unwrap();
+                    // handled by document sender
                 }
                 DocumentChange::Update(update) => {
-                    /// FIXME: this will force the parsing/retrieval of VectorDocument once per embedder
-                    /// consider doing all embedders at once?
                     let old_vectors = update.current_vectors(
                         &context.txn,
                         context.index,
                         context.db_fields_ids_map,
                         &context.doc_alloc,
                     )?;
-                    let old_vectors = old_vectors.vectors_for_key(embedder_name)?.unwrap();
                     let new_vectors = update.updated_vectors(&context.doc_alloc)?;
-                    if let Some(new_vectors) = new_vectors.as_ref().and_then(|new_vectors| {
+
-                        new_vectors.vectors_for_key(embedder_name).transpose()
+                    for chunks in &mut all_chunks {
-                    }) {
+                        let embedder_name = chunks.embedder_name();
-                        let new_vectors = new_vectors?;
+                        let prompt = chunks.prompt();
-                        match (old_vectors.regenerate, new_vectors.regenerate) {
+
-                            (true, true) | (false, false) => todo!(),
+                        let old_vectors = old_vectors.vectors_for_key(embedder_name)?.unwrap();
-                            _ => {
+                        if let Some(new_vectors) = new_vectors.as_ref().and_then(|new_vectors| {
-                                self.sender
+                            new_vectors.vectors_for_key(embedder_name).transpose()
-                                    .set_user_provided(
+                        }) {
-                                        update.docid(),
+                            let new_vectors = new_vectors?;
-                                        self.embedder_id,
+                            match (old_vectors.regenerate, new_vectors.regenerate) {
-                                        !new_vectors.regenerate,
+                                (true, true) | (false, false) => todo!(),
-                                    )
+                                _ => {
-                                    .unwrap();
+                                    chunks.set_regenerate(update.docid(), new_vectors.regenerate);
+                                }
                             }
-                        }
+                            // do we have set embeddings?
-                        // do we have set embeddings?
+                            if let Some(embeddings) = new_vectors.embeddings {
-                        if let Some(embeddings) = new_vectors.embeddings {
+                                chunks.set_vectors(
-                            self.sender
-                                .set_vectors(
                                     update.docid(),
-                                    self.embedder_id,
                                     embeddings.into_vec().map_err(UserError::SerdeJson)?,
-                                )
+                                );
-                                .unwrap();
+                            } else if new_vectors.regenerate {
-                        } else if new_vectors.regenerate {
+                                let new_rendered = prompt.render_document(
-                            let new_rendered = prompt.render_document(
+                                    update.current(
+                                        &context.txn,
+                                        context.index,
+                                        context.db_fields_ids_map,
+                                    )?,
+                                    context.new_fields_ids_map,
+                                    &context.doc_alloc,
+                                )?;
+                                let old_rendered = prompt.render_document(
+                                    update.merged(
+                                        &context.txn,
+                                        context.index,
+                                        context.db_fields_ids_map,
+                                    )?,
+                                    context.new_fields_ids_map,
+                                    &context.doc_alloc,
+                                )?;
+                                if new_rendered != old_rendered {
+                                    chunks.set_autogenerated(update.docid(), new_rendered)?;
+                                }
+                            }
+                        } else if old_vectors.regenerate {
+                            let old_rendered = prompt.render_document(
                                 update.current(
                                     &context.txn,
                                     context.index,
@@ -99,7 +141,7 @@ impl<'a, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a> {
                                 context.new_fields_ids_map,
                                 &context.doc_alloc,
                             )?;
-                            let old_rendered = prompt.render_document(
+                            let new_rendered = prompt.render_document(
                                 update.merged(
                                     &context.txn,
                                     context.index,
@@ -109,82 +151,55 @@ impl<'a, 'extractor> Extractor<'extractor> for EmbeddingExtractor<'a> {
                                 &context.doc_alloc,
                             )?;
                             if new_rendered != old_rendered {
-                                chunks.push(update.docid(), new_rendered)?;
+                                chunks.set_autogenerated(update.docid(), new_rendered)?;
                             }
                         }
-                    } else if old_vectors.regenerate {
-                        let old_rendered = prompt.render_document(
-                            update.current(
-                                &context.txn,
-                                context.index,
-                                context.db_fields_ids_map,
-                            )?,
-                            context.new_fields_ids_map,
-                            &context.doc_alloc,
-                        )?;
-                        let new_rendered = prompt.render_document(
-                            update.merged(
-                                &context.txn,
-                                context.index,
-                                context.db_fields_ids_map,
-                            )?,
-                            context.new_fields_ids_map,
-                            &context.doc_alloc,
-                        )?;
-                        if new_rendered != old_rendered {
-                            chunks.push(update.docid(), new_rendered)?;
-                        }
                     }
                 }
                 DocumentChange::Insertion(insertion) => {
-                    // if no inserted vectors, then regenerate: true + no embeddings => autogenerate
+                    for chunks in &mut all_chunks {
-                    let new_vectors = insertion.inserted_vectors(&context.doc_alloc)?;
+                        let embedder_name = chunks.embedder_name();
-                    if let Some(new_vectors) = new_vectors.as_ref().and_then(|new_vectors| {
+                        let prompt = chunks.prompt();
-                        new_vectors.vectors_for_key(embedder_name).transpose()
+                        // if no inserted vectors, then regenerate: true + no embeddings => autogenerate
-                    }) {
+                        let new_vectors = insertion.inserted_vectors(&context.doc_alloc)?;
-                        let new_vectors = new_vectors?;
+                        if let Some(new_vectors) = new_vectors.as_ref().and_then(|new_vectors| {
-                        self.sender
+                            new_vectors.vectors_for_key(embedder_name).transpose()
-                            .set_user_provided(
+                        }) {
-                                insertion.docid(),
+                            let new_vectors = new_vectors?;
-                                self.embedder_id,
+                            chunks.set_regenerate(insertion.docid(), new_vectors.regenerate);
-                                !new_vectors.regenerate,
+                            if let Some(embeddings) = new_vectors.embeddings {
-                            )
+                                chunks.set_vectors(
-                            .unwrap();
-                        if let Some(embeddings) = new_vectors.embeddings {
-                            self.sender
-                                .set_vectors(
                                     insertion.docid(),
-                                    self.embedder_id,
                                     embeddings.into_vec().map_err(UserError::SerdeJson)?,
-                                )
+                                );
-                                .unwrap();
+                            } else if new_vectors.regenerate {
-                        } else if new_vectors.regenerate {
+                                let rendered = prompt.render_document(
+                                    insertion.inserted(),
+                                    context.new_fields_ids_map,
+                                    &context.doc_alloc,
+                                )?;
+                                chunks.set_autogenerated(insertion.docid(), rendered)?;
+                            }
+                        } else {
                             let rendered = prompt.render_document(
                                 insertion.inserted(),
                                 context.new_fields_ids_map,
                                 &context.doc_alloc,
                             )?;
-                            chunks.push(insertion.docid(), rendered)?;
+                            chunks.set_autogenerated(insertion.docid(), rendered)?;
                         }
-                    } else {
-                        let rendered = prompt.render_document(
-                            insertion.inserted(),
-                            context.new_fields_ids_map,
-                            &context.doc_alloc,
-                        )?;
-                        chunks.push(insertion.docid(), rendered)?;
                     }
                 }
             }
         }
 
-        chunks.drain()
+        for chunk in all_chunks {
+            chunk.drain()?;
+        }
+        Ok(())
     }
 }
 
-use bumpalo::collections::Vec as BVec;
-use bumpalo::Bump;
-
 // **Warning**: the destructor of this struct is not normally run, make sure that all its fields:
 // 1. don't have side effects tied to they destructors
 // 2. if allocated, are allocated inside of the bumpalo
@@ -199,15 +214,21 @@ struct Chunks<'a> {
     embedder: &'a Embedder,
     embedder_id: u8,
     embedder_name: &'a str,
+    prompt: &'a Prompt,
+
+    user_provided: &'a RefCell<HashMap<String, DelAddRoaringBitmap>>,
     threads: &'a ThreadPoolNoAbort,
     sender: &'a EmbeddingSender<'a>,
 }
 
 impl<'a> Chunks<'a> {
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         embedder: &'a Embedder,
         embedder_id: u8,
         embedder_name: &'a str,
+        prompt: &'a Prompt,
+        user_provided: &'a RefCell<HashMap<String, DelAddRoaringBitmap>>,
         threads: &'a ThreadPoolNoAbort,
         sender: &'a EmbeddingSender<'a>,
         doc_alloc: &'a Bump,
@@ -215,10 +236,20 @@ impl<'a> Chunks<'a> {
         let capacity = embedder.prompt_count_in_chunk_hint() * embedder.chunk_count_hint();
         let texts = BVec::with_capacity_in(capacity, doc_alloc);
         let ids = BVec::with_capacity_in(capacity, doc_alloc);
-        Self { texts, ids, embedder, threads, sender, embedder_id, embedder_name }
+        Self {
+            texts,
+            ids,
+            embedder,
+            prompt,
+            threads,
+            sender,
+            embedder_id,
+            embedder_name,
+            user_provided,
+        }
     }
 
-    pub fn push(&mut self, docid: DocumentId, rendered: &'a str) -> Result<()> {
+    pub fn set_autogenerated(&mut self, docid: DocumentId, rendered: &'a str) -> Result<()> {
         if self.texts.len() < self.texts.capacity() {
             self.texts.push(rendered);
             self.ids.push(docid);
@@ -316,4 +347,28 @@ impl<'a> Chunks<'a> {
         ids.clear();
         res
     }
+
+    pub fn prompt(&self) -> &'a Prompt {
+        self.prompt
+    }
+
+    pub fn embedder_name(&self) -> &'a str {
+        self.embedder_name
+    }
+
+    fn set_regenerate(&self, docid: DocumentId, regenerate: bool) {
+        let mut user_provided = self.user_provided.borrow_mut();
+        let user_provided =
+            user_provided.entry_ref(self.embedder_name).or_insert(Default::default());
+        if regenerate {
+            // regenerate == !user_provided
+            user_provided.del.get_or_insert(Default::default()).insert(docid);
+        } else {
+            user_provided.add.get_or_insert(Default::default()).insert(docid);
+        }
+    }
+
+    fn set_vectors(&self, docid: DocumentId, embeddings: Vec<Embedding>) {
+        self.sender.set_vectors(docid, self.embedder_id, embeddings).unwrap();
+    }
 }

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

@@ -1,5 +1,5 @@
 use std::cell::RefCell;
-use std::sync::RwLock;
+use std::sync::{OnceLock, RwLock};
 use std::thread::{self, Builder};
 
 use big_s::S;
@@ -10,9 +10,13 @@ use document_changes::{
 };
 pub use document_deletion::DocumentDeletion;
 pub use document_operation::DocumentOperation;
+use hashbrown::HashMap;
 use heed::{RoTxn, RwTxn};
+use itertools::{EitherOrBoth, Itertools};
 pub use partial_dump::PartialDump;
+use rand::SeedableRng as _;
 use rayon::ThreadPool;
+use roaring::RoaringBitmap;
 use time::OffsetDateTime;
 pub use update_by_function::UpdateByFunction;
 
@@ -31,10 +35,15 @@ use crate::facet::FacetType;
 use crate::fields_ids_map::metadata::{FieldIdMapWithMetadata, MetadataBuilder};
 use crate::proximity::ProximityPrecision;
 use crate::update::new::channel::ExtractorSender;
+use crate::update::new::extract::EmbeddingExtractor;
 use crate::update::new::words_prefix_docids::compute_exact_word_prefix_docids;
 use crate::update::settings::InnerIndexSettings;
 use crate::update::{FacetsUpdateBulk, GrenadParameters};
-use crate::{FieldsIdsMap, GlobalFieldsIdsMap, Index, Result, UserError};
+use crate::vector::{ArroyWrapper, EmbeddingConfigs};
+use crate::{
+    FieldsIdsMap, GlobalFieldsIdsMap, Index, InternalError, Result, ThreadPoolNoAbort,
+    ThreadPoolNoAbortBuilder, UserError,
+};
 
 pub(crate) mod de;
 pub mod document_changes;
@@ -119,6 +128,7 @@ impl<'a, 'extractor> Extractor<'extractor> for DocumentExtractor<'a> {
 /// Give it the output of the [`Indexer::document_changes`] method and it will execute it in the [`rayon::ThreadPool`].
 ///
 /// TODO return stats
+#[allow(clippy::too_many_arguments)] // clippy: 😝
 pub fn index<'pl, 'indexer, 'index, DC>(
     wtxn: &mut RwTxn,
     index: &'index Index,
@@ -127,6 +137,7 @@ pub fn index<'pl, 'indexer, 'index, DC>(
     new_primary_key: Option<PrimaryKey<'pl>>,
     pool: &ThreadPool,
     document_changes: &DC,
+    embedders: EmbeddingConfigs,
 ) -> Result<()>
 where
     DC: DocumentChanges<'pl>,
@@ -153,8 +164,9 @@ where
         fields_ids_map_store: &fields_ids_map_store,
     };
 
-    thread::scope(|s| {
+    thread::scope(|s| -> Result<()> {
         let indexer_span = tracing::Span::current();
+        let embedders = &embedders;
         // TODO manage the errors correctly
         let handle = Builder::new().name(S("indexer-extractors")).spawn_scoped(s, move || {
             pool.in_place_scope(|_s| {
@@ -238,9 +250,29 @@ where
                         if index_embeddings.is_empty() {
                             break 'vectors;
                         }
-                        for index_embedding in index_embeddings {
+                        /// FIXME: need access to `merger_sender`
+                        let embedding_sender = todo!();
+                        let extractor = EmbeddingExtractor::new(&embedders, &embedding_sender, request_threads());
+                        let datastore = ThreadLocal::with_capacity(pool.current_num_threads());
 
+                        for_each_document_change(document_changes, &extractor, indexing_context, &mut extractor_allocs, &datastore)?;
+
+
+                        let mut user_provided = HashMap::new();
+                        for data in datastore {
+                            let data = data.0.into_inner();
+                            for (embedder, deladd) in data.into_iter() {
+                                let user_provided = user_provided.entry(embedder).or_insert(Default::default());
+                                if let Some(del) = deladd.del {
+                                    *user_provided -= del;
+                                }
+                                if let Some(add) = deladd.add {
+                                    *user_provided |= add;
+                                }
+                            }
                         }
+
+                        embedding_sender.finish(user_provided).unwrap();
                     }
 
                     {
@@ -285,15 +317,137 @@ where
             )
         })?;
 
+        let vector_arroy = index.vector_arroy;
+        let mut rng = rand::rngs::StdRng::seed_from_u64(42);
+        let indexer_span = tracing::Span::current();
+        let arroy_writers: Result<HashMap<_, _>> = embedders
+            .inner_as_ref()
+            .iter()
+            .map(|(embedder_name, (embedder, _, was_quantized))| {
+                let embedder_index = index.embedder_category_id.get(wtxn, &embedder_name)?.ok_or(
+                    InternalError::DatabaseMissingEntry {
+                        db_name: "embedder_category_id",
+                        key: None,
+                    },
+                )?;
+
+                let dimensions = embedder.dimensions();
+
+                let writers: Vec<_> = crate::vector::arroy_db_range_for_embedder(embedder_index)
+                    .map(|k| ArroyWrapper::new(vector_arroy, k, *was_quantized))
+                    .collect();
+
+                Ok((
+                    embedder_index,
+                    (embedder_name.as_str(), embedder.as_ref(), writers, dimensions),
+                ))
+            })
+            .collect();
+
+        let mut arroy_writers = arroy_writers?;
         for operation in writer_receiver {
-            let database = operation.database(index);
+            match operation {
-            match operation.entry() {
+                WriterOperation::DbOperation(db_operation) => {
-                EntryOperation::Delete(e) => {
+                    let database = db_operation.database(index);
-                    if !database.delete(wtxn, e.entry())? {
+                    match db_operation.entry() {
-                        unreachable!("We tried to delete an unknown key")
+                        EntryOperation::Delete(e) => {
+                            if !database.delete(wtxn, e.entry())? {
+                                unreachable!("We tried to delete an unknown key")
+                            }
+                        }
+                        EntryOperation::Write(e) => database.put(wtxn, e.key(), e.value())?,
                     }
                 }
-                EntryOperation::Write(e) => database.put(wtxn, e.key(), e.value())?,
+                WriterOperation::ArroyOperation(arroy_operation) => match arroy_operation {
+                    ArroyOperation::DeleteVectors { docid } => {
+                        for (_embedder_index, (_embedder_name, _embedder, writers, dimensions)) in
+                            &mut arroy_writers
+                        {
+                            let dimensions = *dimensions;
+                            for writer in writers {
+                                // Uses invariant: vectors are packed in the first writers.
+                                if !writer.del_item(wtxn, dimensions, docid)? {
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                    ArroyOperation::SetVectors { docid, embedder_id, embeddings } => {
+                        let (_, _, writers, dimensions) =
+                            arroy_writers.get(&embedder_id).expect("requested a missing embedder");
+                        for res in writers.iter().zip_longest(&embeddings) {
+                            match res {
+                                EitherOrBoth::Both(writer, embedding) => {
+                                    writer.add_item(wtxn, *dimensions, docid, embedding)?;
+                                }
+                                EitherOrBoth::Left(writer) => {
+                                    let deleted = writer.del_item(wtxn, *dimensions, docid)?;
+                                    if !deleted {
+                                        break;
+                                    }
+                                }
+                                EitherOrBoth::Right(_embedding) => {
+                                    let external_document_id = index
+                                        .external_id_of(wtxn, std::iter::once(docid))?
+                                        .into_iter()
+                                        .next()
+                                        .unwrap()?;
+                                    return Err(UserError::TooManyVectors(
+                                        external_document_id,
+                                        embeddings.len(),
+                                    )
+                                    .into());
+                                }
+                            }
+                        }
+                    }
+                    ArroyOperation::SetVector { docid, embedder_id, embedding } => {
+                        let (_, _, writers, dimensions) =
+                            arroy_writers.get(&embedder_id).expect("requested a missing embedder");
+                        for res in writers.iter().zip_longest(std::iter::once(&embedding)) {
+                            match res {
+                                EitherOrBoth::Both(writer, embedding) => {
+                                    writer.add_item(wtxn, *dimensions, docid, embedding)?;
+                                }
+                                EitherOrBoth::Left(writer) => {
+                                    let deleted = writer.del_item(wtxn, *dimensions, docid)?;
+                                    if !deleted {
+                                        break;
+                                    }
+                                }
+                                EitherOrBoth::Right(_embedding) => {
+                                    unreachable!("1 vs 256 vectors")
+                                }
+                            }
+                        }
+                    }
+                    ArroyOperation::Finish { mut user_provided } => {
+                        let span = tracing::trace_span!(target: "indexing::vectors", parent: &indexer_span, "build");
+                        let _entered = span.enter();
+                        for (_embedder_index, (_embedder_name, _embedder, writers, dimensions)) in
+                            &mut arroy_writers
+                        {
+                            let dimensions = *dimensions;
+                            for writer in writers {
+                                if writer.need_build(wtxn, dimensions)? {
+                                    writer.build(wtxn, &mut rng, dimensions)?;
+                                } else if writer.is_empty(wtxn, dimensions)? {
+                                    break;
+                                }
+                            }
+                        }
+
+                        let mut configs = index.embedding_configs(wtxn)?;
+
+                        for config in &mut configs {
+                            if let Some(user_provided) = user_provided.remove(&config.name) {
+                                config.user_provided = user_provided;
+                            }
+                        }
+
+                        index.put_embedding_configs(wtxn, configs)?;
+                    }
+                },
             }
         }
 
@@ -483,3 +637,15 @@ pub fn retrieve_or_guess_primary_key<'a>(
         Err(err) => Ok(Err(err)),
     }
 }
+
+fn request_threads() -> &'static ThreadPoolNoAbort {
+    static REQUEST_THREADS: OnceLock<ThreadPoolNoAbort> = OnceLock::new();
+
+    REQUEST_THREADS.get_or_init(|| {
+        ThreadPoolNoAbortBuilder::new()
+            .num_threads(crate::vector::REQUEST_PARALLELISM)
+            .thread_name(|index| format!("embedding-request-{index}"))
+            .build()
+            .unwrap()
+    })
+}

milli/src/update/new/merger.rs

@@ -149,6 +149,7 @@ pub fn merge_grenad_entries(
                 }
             }
             MergerOperation::DeleteDocument { docid, external_id } => {
+                /// TODO: delete vectors
                 let span =
                     tracing::trace_span!(target: "indexing::documents::merge", "delete_document");
                 let _entered = span.enter();