Add deadline of 3 seconds to embedding requests made in the context of hybrid search

index-scheduler/src/lib.rs

@@ -5201,9 +5201,10 @@ mod tests {
 
             let configs = index_scheduler.embedders(configs).unwrap();
             let (hf_embedder, _, _) = configs.get(&simple_hf_name).unwrap();
-            let beagle_embed = hf_embedder.embed_one(S("Intel the beagle best doggo")).unwrap();
-            let lab_embed = hf_embedder.embed_one(S("Max the lab best doggo")).unwrap();
-            let patou_embed = hf_embedder.embed_one(S("kefir the patou best doggo")).unwrap();
+            let beagle_embed =
+                hf_embedder.embed_one(S("Intel the beagle best doggo"), None).unwrap();
+            let lab_embed = hf_embedder.embed_one(S("Max the lab best doggo"), None).unwrap();
+            let patou_embed = hf_embedder.embed_one(S("kefir the patou best doggo"), None).unwrap();
             (fakerest_name, simple_hf_name, beagle_embed, lab_embed, patou_embed)
         };
 

meilisearch/src/search/mod.rs

@@ -796,8 +796,10 @@ fn prepare_search<'t>(
                     let span = tracing::trace_span!(target: "search::vector", "embed_one");
                     let _entered = span.enter();
 
+                    let deadline = std::time::Instant::now() + std::time::Duration::from_secs(10);
+
                     embedder
-                        .embed_one(query.q.clone().unwrap())
+                        .embed_one(query.q.clone().unwrap(), Some(deadline))
                         .map_err(milli::vector::Error::from)
                         .map_err(milli::Error::from)?
                 }

milli/src/search/hybrid.rs

@@ -201,7 +201,9 @@ impl<'a> Search<'a> {
                 let span = tracing::trace_span!(target: "search::hybrid", "embed_one");
                 let _entered = span.enter();
 
-                match embedder.embed_one(query) {
+                let deadline = std::time::Instant::now() + std::time::Duration::from_secs(3);
+
+                match embedder.embed_one(query, Some(deadline)) {
                     Ok(embedding) => embedding,
                     Err(error) => {
                         tracing::error!(error=%error, "Embedding failed");

milli/src/vector/mod.rs

@@ -1,5 +1,6 @@
 use std::collections::HashMap;
 use std::sync::Arc;
+use std::time::Instant;
 
 use arroy::distances::{BinaryQuantizedCosine, Cosine};
 use arroy::ItemId;
@@ -594,18 +595,23 @@ impl Embedder {
     pub fn embed(
         &self,
         texts: Vec<String>,
+        deadline: Option<Instant>,
     ) -> std::result::Result<Vec<Embeddings<f32>>, EmbedError> {
         match self {
             Embedder::HuggingFace(embedder) => embedder.embed(texts),
-            Embedder::OpenAi(embedder) => embedder.embed(texts),
-            Embedder::Ollama(embedder) => embedder.embed(texts),
+            Embedder::OpenAi(embedder) => embedder.embed(texts, deadline),
+            Embedder::Ollama(embedder) => embedder.embed(texts, deadline),
             Embedder::UserProvided(embedder) => embedder.embed(texts),
-            Embedder::Rest(embedder) => embedder.embed(texts),
+            Embedder::Rest(embedder) => embedder.embed(texts, deadline),
         }
     }
 
-    pub fn embed_one(&self, text: String) -> std::result::Result<Embedding, EmbedError> {
-        let mut embeddings = self.embed(vec![text])?;
+    pub fn embed_one(
+        &self,
+        text: String,
+        deadline: Option<Instant>,
+    ) -> std::result::Result<Embedding, EmbedError> {
+        let mut embeddings = self.embed(vec![text], deadline)?;
         let embeddings = embeddings.pop().ok_or_else(EmbedError::missing_embedding)?;
         Ok(if embeddings.iter().nth(1).is_some() {
             tracing::warn!("Ignoring embeddings past the first one in long search query");

milli/src/vector/ollama.rs

@@ -1,3 +1,5 @@
+use std::time::Instant;
+
 use rayon::iter::{IntoParallelIterator as _, ParallelIterator as _};
 
 use super::error::{EmbedError, EmbedErrorKind, NewEmbedderError, NewEmbedderErrorKind};
@@ -75,8 +77,12 @@ impl Embedder {
         Ok(Self { rest_embedder })
     }
 
-    pub fn embed(&self, texts: Vec<String>) -> Result<Vec<Embeddings<f32>>, EmbedError> {
-        match self.rest_embedder.embed(texts) {
+    pub fn embed(
+        &self,
+        texts: Vec<String>,
+        deadline: Option<Instant>,
+    ) -> Result<Vec<Embeddings<f32>>, EmbedError> {
+        match self.rest_embedder.embed(texts, deadline) {
             Ok(embeddings) => Ok(embeddings),
             Err(EmbedError { kind: EmbedErrorKind::RestOtherStatusCode(404, error), fault: _ }) => {
                 Err(EmbedError::ollama_model_not_found(error))
@@ -92,7 +98,7 @@ impl Embedder {
     ) -> Result<Vec<Vec<Embeddings<f32>>>, EmbedError> {
         threads
             .install(move || {
-                text_chunks.into_par_iter().map(move |chunk| self.embed(chunk)).collect()
+                text_chunks.into_par_iter().map(move |chunk| self.embed(chunk, None)).collect()
             })
             .map_err(|error| EmbedError {
                 kind: EmbedErrorKind::PanicInThreadPool(error),

milli/src/vector/openai.rs

@@ -1,3 +1,5 @@
+use std::time::Instant;
+
 use ordered_float::OrderedFloat;
 use rayon::iter::{IntoParallelIterator, ParallelIterator as _};
 
@@ -206,32 +208,40 @@ impl Embedder {
         Ok(Self { options, rest_embedder, tokenizer })
     }
 
-    pub fn embed(&self, texts: Vec<String>) -> Result<Vec<Embeddings<f32>>, EmbedError> {
-        match self.rest_embedder.embed_ref(&texts) {
+    pub fn embed(
+        &self,
+        texts: Vec<String>,
+        deadline: Option<Instant>,
+    ) -> Result<Vec<Embeddings<f32>>, EmbedError> {
+        match self.rest_embedder.embed_ref(&texts, deadline) {
             Ok(embeddings) => Ok(embeddings),
             Err(EmbedError { kind: EmbedErrorKind::RestBadRequest(error, _), fault: _ }) => {
                 tracing::warn!(error=?error, "OpenAI: received `BAD_REQUEST`. Input was maybe too long, retrying on tokenized version. For best performance, limit the size of your document template.");
-                self.try_embed_tokenized(&texts)
+                self.try_embed_tokenized(&texts, deadline)
             }
             Err(error) => Err(error),
         }
     }
 
-    fn try_embed_tokenized(&self, text: &[String]) -> Result<Vec<Embeddings<f32>>, EmbedError> {
+    fn try_embed_tokenized(
+        &self,
+        text: &[String],
+        deadline: Option<Instant>,
+    ) -> Result<Vec<Embeddings<f32>>, EmbedError> {
         let mut all_embeddings = Vec::with_capacity(text.len());
         for text in text {
             let max_token_count = self.options.embedding_model.max_token();
             let encoded = self.tokenizer.encode_ordinary(text.as_str());
             let len = encoded.len();
             if len < max_token_count {
-                all_embeddings.append(&mut self.rest_embedder.embed_ref(&[text])?);
+                all_embeddings.append(&mut self.rest_embedder.embed_ref(&[text], deadline)?);
                 continue;
             }
 
             let tokens = &encoded.as_slice()[0..max_token_count];
             let mut embeddings_for_prompt = Embeddings::new(self.dimensions());
 
-            let embedding = self.rest_embedder.embed_tokens(tokens)?;
+            let embedding = self.rest_embedder.embed_tokens(tokens, deadline)?;
             embeddings_for_prompt.append(embedding.into_inner()).map_err(|got| {
                 EmbedError::rest_unexpected_dimension(self.dimensions(), got.len())
             })?;
@@ -248,7 +258,7 @@ impl Embedder {
     ) -> Result<Vec<Vec<Embeddings<f32>>>, EmbedError> {
         threads
             .install(move || {
-                text_chunks.into_par_iter().map(move |chunk| self.embed(chunk)).collect()
+                text_chunks.into_par_iter().map(move |chunk| self.embed(chunk, None)).collect()
             })
             .map_err(|error| EmbedError {
                 kind: EmbedErrorKind::PanicInThreadPool(error),

milli/src/vector/rest.rs

@@ -1,4 +1,5 @@
 use std::collections::BTreeMap;
+use std::time::Instant;
 
 use deserr::Deserr;
 use rand::Rng;
@@ -154,19 +155,31 @@ impl Embedder {
         Ok(Self { data, dimensions, distribution: options.distribution })
     }
 
-    pub fn embed(&self, texts: Vec<String>) -> Result<Vec<Embeddings<f32>>, EmbedError> {
-        embed(&self.data, texts.as_slice(), texts.len(), Some(self.dimensions))
+    pub fn embed(
+        &self,
+        texts: Vec<String>,
+        deadline: Option<Instant>,
+    ) -> Result<Vec<Embeddings<f32>>, EmbedError> {
+        embed(&self.data, texts.as_slice(), texts.len(), Some(self.dimensions), deadline)
     }
 
-    pub fn embed_ref<S>(&self, texts: &[S]) -> Result<Vec<Embeddings<f32>>, EmbedError>
+    pub fn embed_ref<S>(
+        &self,
+        texts: &[S],
+        deadline: Option<Instant>,
+    ) -> Result<Vec<Embeddings<f32>>, EmbedError>
     where
         S: AsRef<str> + Serialize,
     {
-        embed(&self.data, texts, texts.len(), Some(self.dimensions))
+        embed(&self.data, texts, texts.len(), Some(self.dimensions), deadline)
     }
 
-    pub fn embed_tokens(&self, tokens: &[usize]) -> Result<Embeddings<f32>, EmbedError> {
-        let mut embeddings = embed(&self.data, tokens, 1, Some(self.dimensions))?;
+    pub fn embed_tokens(
+        &self,
+        tokens: &[usize],
+        deadline: Option<Instant>,
+    ) -> Result<Embeddings<f32>, EmbedError> {
+        let mut embeddings = embed(&self.data, tokens, 1, Some(self.dimensions), deadline)?;
         // unwrap: guaranteed that embeddings.len() == 1, otherwise the previous line terminated in error
         Ok(embeddings.pop().unwrap())
     }
@@ -178,7 +191,7 @@ impl Embedder {
     ) -> Result<Vec<Vec<Embeddings<f32>>>, EmbedError> {
         threads
             .install(move || {
-                text_chunks.into_par_iter().map(move |chunk| self.embed(chunk)).collect()
+                text_chunks.into_par_iter().map(move |chunk| self.embed(chunk, None)).collect()
             })
             .map_err(|error| EmbedError {
                 kind: EmbedErrorKind::PanicInThreadPool(error),
@@ -207,7 +220,7 @@ impl Embedder {
 }
 
 fn infer_dimensions(data: &EmbedderData) -> Result<usize, NewEmbedderError> {
-    let v = embed(data, ["test"].as_slice(), 1, None)
+    let v = embed(data, ["test"].as_slice(), 1, None, None)
         .map_err(NewEmbedderError::could_not_determine_dimension)?;
     // unwrap: guaranteed that v.len() == 1, otherwise the previous line terminated in error
     Ok(v.first().unwrap().dimension())
@@ -218,6 +231,7 @@ fn embed<S>(
     inputs: &[S],
     expected_count: usize,
     expected_dimension: Option<usize>,
+    deadline: Option<Instant>,
 ) -> Result<Vec<Embeddings<f32>>, EmbedError>
 where
     S: Serialize,
@@ -245,8 +259,19 @@ where
             }
             Err(retry) => {
                 tracing::warn!("Failed: {}", retry.error);
+                if let Some(deadline) = deadline {
+                    let now = std::time::Instant::now();
+                    if now > deadline {
+                        tracing::warn!("Could not embed due to deadline");
+                        return Err(retry.into_error());
+                    }
+
+                    let duration_to_deadline = deadline - now;
+                    retry.into_duration(attempt).map(|duration| duration.min(duration_to_deadline))
+                } else {
                     retry.into_duration(attempt)
                 }
+            }
         }?;
 
         let retry_duration = retry_duration.min(std::time::Duration::from_secs(60)); // don't wait more than a minute