Add maxBytes parameter

milli/src/update/index_documents/mod.rs

@@ -2740,6 +2740,7 @@ mod tests {
                         api_key: Setting::NotSet,
                         dimensions: Setting::Set(3),
                         document_template: Setting::NotSet,
+                        document_template_max_bytes: Setting::NotSet,
                         url: Setting::NotSet,
                         request: Setting::NotSet,
                         response: Setting::NotSet,

milli/src/update/settings.rs

@@ -1,5 +1,6 @@
 use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::convert::TryInto;
+use std::num::NonZeroUsize;
 use std::result::Result as StdResult;
 use std::sync::Arc;
 
@@ -19,6 +20,7 @@ use crate::index::{
     IndexEmbeddingConfig, DEFAULT_MIN_WORD_LEN_ONE_TYPO, DEFAULT_MIN_WORD_LEN_TWO_TYPOS,
 };
 use crate::order_by_map::OrderByMap;
+use crate::prompt::default_max_bytes;
 use crate::proximity::ProximityPrecision;
 use crate::update::index_documents::IndexDocumentsMethod;
 use crate::update::{IndexDocuments, UpdateIndexingStep};
@@ -1573,14 +1575,28 @@ fn validate_prompt(
             api_key,
             dimensions,
             document_template: Setting::Set(template),
+            document_template_max_bytes,
             url,
             request,
             response,
             distribution,
             headers,
         }) => {
+            let max_bytes = match document_template_max_bytes.set() {
+                Some(max_bytes) => NonZeroUsize::new(max_bytes).ok_or_else(|| {
+                    crate::error::UserError::InvalidSettingsDocumentTemplateMaxBytes {
+                        embedder_name: name.to_owned(),
+                    }
+                })?,
+                None => default_max_bytes(),
+            };
+
             // validate
-            let template = crate::prompt::Prompt::new(template)
+            let template = crate::prompt::Prompt::new(
+                template,
+                // always specify a max_bytes
+                Some(max_bytes),
+            )
             .map(|prompt| crate::prompt::PromptData::from(prompt).template)
             .map_err(|inner| UserError::InvalidPromptForEmbeddings(name.to_owned(), inner))?;
 
@@ -1591,6 +1607,7 @@ fn validate_prompt(
                 api_key,
                 dimensions,
                 document_template: Setting::Set(template),
+                document_template_max_bytes,
                 url,
                 request,
                 response,
@@ -1615,6 +1632,7 @@ pub fn validate_embedding_settings(
         api_key,
         dimensions,
         document_template,
+        document_template_max_bytes,
         url,
         request,
         response,
@@ -1654,6 +1672,7 @@ pub fn validate_embedding_settings(
             api_key,
             dimensions,
             document_template,
+            document_template_max_bytes,
             url,
             request,
             response,
@@ -1726,6 +1745,12 @@ pub fn validate_embedding_settings(
                 inferred_source,
                 name,
             )?;
+            check_unset(
+                &document_template_max_bytes,
+                EmbeddingSettings::DOCUMENT_TEMPLATE_MAX_BYTES,
+                inferred_source,
+                name,
+            )?;
             check_set(&dimensions, EmbeddingSettings::DIMENSIONS, inferred_source, name)?;
 
             check_unset(&url, EmbeddingSettings::URL, inferred_source, name)?;
@@ -1748,6 +1773,7 @@ pub fn validate_embedding_settings(
         api_key,
         dimensions,
         document_template,
+        document_template_max_bytes,
         url,
         request,
         response,

milli/src/vector/settings.rs

@@ -1,11 +1,12 @@
 use std::collections::BTreeMap;
+use std::num::NonZeroUsize;
 
 use deserr::Deserr;
 use roaring::RoaringBitmap;
 use serde::{Deserialize, Serialize};
 
 use super::{ollama, openai, DistributionShift};
-use crate::prompt::PromptData;
+use crate::prompt::{default_max_bytes, PromptData};
 use crate::update::Setting;
 use crate::vector::EmbeddingConfig;
 use crate::UserError;
@@ -34,6 +35,9 @@ pub struct EmbeddingSettings {
     pub document_template: Setting<String>,
     #[serde(default, skip_serializing_if = "Setting::is_not_set")]
     #[deserr(default)]
+    pub document_template_max_bytes: Setting<usize>,
+    #[serde(default, skip_serializing_if = "Setting::is_not_set")]
+    #[deserr(default)]
     pub url: Setting<String>,
     #[serde(default, skip_serializing_if = "Setting::is_not_set")]
     #[deserr(default)]
@@ -111,6 +115,7 @@ impl SettingsDiff {
                     mut response,
                     mut distribution,
                     mut headers,
+                    mut document_template_max_bytes,
                 } = old;
 
                 let EmbeddingSettings {
@@ -125,6 +130,7 @@ impl SettingsDiff {
                     response: new_response,
                     distribution: new_distribution,
                     headers: new_headers,
+                    document_template_max_bytes: new_document_template_max_bytes,
                 } = new;
 
                 let mut reindex_action = None;
@@ -142,6 +148,7 @@ impl SettingsDiff {
                         &mut request,
                         &mut response,
                         &mut document_template,
+                        &mut document_template_max_bytes,
                         &mut headers,
                     )
                 }
@@ -189,6 +196,12 @@ impl SettingsDiff {
                         ReindexAction::RegeneratePrompts,
                     );
                 }
+                if document_template_max_bytes.apply(new_document_template_max_bytes) {
+                    ReindexAction::push_action(
+                        &mut reindex_action,
+                        ReindexAction::RegeneratePrompts,
+                    )
+                }
 
                 distribution.apply(new_distribution);
                 api_key.apply(new_api_key);
@@ -206,6 +219,7 @@ impl SettingsDiff {
                     response,
                     distribution,
                     headers,
+                    document_template_max_bytes,
                 };
 
                 match reindex_action {
@@ -239,6 +253,7 @@ fn apply_default_for_source(
     request: &mut Setting<serde_json::Value>,
     response: &mut Setting<serde_json::Value>,
     document_template: &mut Setting<String>,
+    document_template_max_bytes: &mut Setting<usize>,
     headers: &mut Setting<BTreeMap<String, String>>,
 ) {
     match source {
@@ -286,6 +301,7 @@ fn apply_default_for_source(
             *request = Setting::NotSet;
             *response = Setting::NotSet;
             *document_template = Setting::NotSet;
+            *document_template_max_bytes = Setting::NotSet;
             *headers = Setting::NotSet;
         }
         Setting::NotSet => {}
@@ -316,6 +332,7 @@ impl EmbeddingSettings {
     pub const API_KEY: &'static str = "apiKey";
     pub const DIMENSIONS: &'static str = "dimensions";
     pub const DOCUMENT_TEMPLATE: &'static str = "documentTemplate";
+    pub const DOCUMENT_TEMPLATE_MAX_BYTES: &'static str = "documentTemplateMaxBytes";
 
     pub const URL: &'static str = "url";
     pub const REQUEST: &'static str = "request";
@@ -459,6 +476,8 @@ impl std::fmt::Display for EmbedderSource {
 impl From<EmbeddingConfig> for EmbeddingSettings {
     fn from(value: EmbeddingConfig) -> Self {
         let EmbeddingConfig { embedder_options, prompt } = value;
+        let document_template_max_bytes =
+            Setting::Set(prompt.max_bytes.unwrap_or(default_max_bytes()).get());
         match embedder_options {
             super::EmbedderOptions::HuggingFace(super::hf::EmbedderOptions {
                 model,
@@ -471,6 +490,7 @@ impl From<EmbeddingConfig> for EmbeddingSettings {
                 api_key: Setting::NotSet,
                 dimensions: Setting::NotSet,
                 document_template: Setting::Set(prompt.template),
+                document_template_max_bytes,
                 url: Setting::NotSet,
                 request: Setting::NotSet,
                 response: Setting::NotSet,
@@ -490,6 +510,7 @@ impl From<EmbeddingConfig> for EmbeddingSettings {
                 api_key: Setting::some_or_not_set(api_key),
                 dimensions: Setting::some_or_not_set(dimensions),
                 document_template: Setting::Set(prompt.template),
+                document_template_max_bytes,
                 url: Setting::some_or_not_set(url),
                 request: Setting::NotSet,
                 response: Setting::NotSet,
@@ -509,6 +530,7 @@ impl From<EmbeddingConfig> for EmbeddingSettings {
                 api_key: Setting::some_or_not_set(api_key),
                 dimensions: Setting::some_or_not_set(dimensions),
                 document_template: Setting::Set(prompt.template),
+                document_template_max_bytes,
                 url: Setting::some_or_not_set(url),
                 request: Setting::NotSet,
                 response: Setting::NotSet,
@@ -525,6 +547,7 @@ impl From<EmbeddingConfig> for EmbeddingSettings {
                 api_key: Setting::NotSet,
                 dimensions: Setting::Set(dimensions),
                 document_template: Setting::NotSet,
+                document_template_max_bytes: Setting::NotSet,
                 url: Setting::NotSet,
                 request: Setting::NotSet,
                 response: Setting::NotSet,
@@ -546,6 +569,7 @@ impl From<EmbeddingConfig> for EmbeddingSettings {
                 api_key: Setting::some_or_not_set(api_key),
                 dimensions: Setting::some_or_not_set(dimensions),
                 document_template: Setting::Set(prompt.template),
+                document_template_max_bytes,
                 url: Setting::Set(url),
                 request: Setting::Set(request),
                 response: Setting::Set(response),
@@ -566,6 +590,7 @@ impl From<EmbeddingSettings> for EmbeddingConfig {
             api_key,
             dimensions,
             document_template,
+            document_template_max_bytes,
             url,
             request,
             response,
@@ -648,7 +673,12 @@ impl From<EmbeddingSettings> for EmbeddingConfig {
         }
 
         if let Setting::Set(template) = document_template {
-            this.prompt = PromptData { template }
+            let max_bytes = document_template_max_bytes
+                .set()
+                .and_then(NonZeroUsize::new)
+                .unwrap_or(default_max_bytes());
+
+            this.prompt = PromptData { template, max_bytes: Some(max_bytes) }
         }
 
         this