feat: introduce PuffinMetadataCache

src/mito2/src/cache.rs

@@ -32,6 +32,7 @@ use moka::notification::RemovalCause;
 use moka::sync::Cache;
 use parquet::column::page::Page;
 use parquet::file::metadata::ParquetMetaData;
+use puffin::puffin_manager::cache::{PuffinMetadataCache, PuffinMetadataCacheRef};
 use store_api::storage::{ConcreteDataType, RegionId, TimeSeriesRowSelector};
 
 use crate::cache::cache_size::parquet_meta_size;
@@ -68,6 +69,8 @@ pub struct CacheManager {
     write_cache: Option<WriteCacheRef>,
     /// Cache for inverted index.
     index_cache: Option<InvertedIndexCacheRef>,
+    /// Puffin metadata cache.
+    puffin_metadata_cache: Option<PuffinMetadataCacheRef>,
     /// Cache for time series selectors.
     selector_result_cache: Option<SelectorResultCache>,
 }
@@ -217,6 +220,10 @@ impl CacheManager {
     pub(crate) fn index_cache(&self) -> Option<&InvertedIndexCacheRef> {
         self.index_cache.as_ref()
     }
+
+    pub(crate) fn puffin_metadata_cache(&self) -> Option<&PuffinMetadataCacheRef> {
+        self.puffin_metadata_cache.as_ref()
+    }
 }
 
 /// Increases selector cache miss metrics.
@@ -237,6 +244,7 @@ pub struct CacheManagerBuilder {
     page_cache_size: u64,
     index_metadata_size: u64,
     index_content_size: u64,
+    puffin_metadata_size: u64,
     write_cache: Option<WriteCacheRef>,
     selector_result_cache_size: u64,
 }
@@ -278,6 +286,12 @@ impl CacheManagerBuilder {
         self
     }
 
+    /// Sets cache size for puffin metadata.
+    pub fn puffin_metadata_size(mut self, bytes: u64) -> Self {
+        self.puffin_metadata_size = bytes;
+        self
+    }
+
     /// Sets selector result cache size.
     pub fn selector_result_cache_size(mut self, bytes: u64) -> Self {
         self.selector_result_cache_size = bytes;
@@ -340,6 +354,8 @@ impl CacheManagerBuilder {
         });
         let inverted_index_cache =
             InvertedIndexCache::new(self.index_metadata_size, self.index_content_size);
+        let puffin_metadata_cache =
+            PuffinMetadataCache::new(self.puffin_metadata_size, &CACHE_BYTES);
         let selector_result_cache = (self.selector_result_cache_size != 0).then(|| {
             Cache::builder()
                 .max_capacity(self.selector_result_cache_size)
@@ -361,6 +377,7 @@ impl CacheManagerBuilder {
             page_cache,
             write_cache: self.write_cache,
             index_cache: Some(Arc::new(inverted_index_cache)),
+            puffin_metadata_cache: Some(Arc::new(puffin_metadata_cache)),
             selector_result_cache,
         }
     }

src/mito2/src/config.rs

@@ -304,6 +304,9 @@ pub struct IndexConfig {
 
     /// Write buffer size for creating the index.
     pub write_buffer_size: ReadableSize,
+
+    /// Cache size for metadata of puffin files. Setting it to 0 to disable the cache.
+    pub metadata_cache_size: ReadableSize,
 }
 
 impl Default for IndexConfig {
@@ -312,6 +315,7 @@ impl Default for IndexConfig {
             aux_path: String::new(),
             staging_size: ReadableSize::gb(2),
             write_buffer_size: ReadableSize::mb(8),
+            metadata_cache_size: ReadableSize::mb(64),
         }
     }
 }

src/mito2/src/read/scan_region.rs

@@ -413,11 +413,15 @@ impl ScanRegion {
             .and_then(|c| c.index_cache())
             .cloned();
 
+        let puffin_metadata_cache = self
+            .cache_manager
+            .as_ref()
+            .and_then(|c| c.puffin_metadata_cache())
+            .cloned();
+
         InvertedIndexApplierBuilder::new(
             self.access_layer.region_dir().to_string(),
             self.access_layer.object_store().clone(),
-            file_cache,
-            index_cache,
             self.version.metadata.as_ref(),
             self.version.metadata.inverted_indexed_column_ids(
                 self.version
@@ -429,6 +433,9 @@ impl ScanRegion {
             ),
             self.access_layer.puffin_manager_factory().clone(),
         )
+        .with_file_cache(file_cache)
+        .with_index_cache(index_cache)
+        .with_puffin_metadata_cache(puffin_metadata_cache)
         .build(&self.request.filters)
         .inspect_err(|err| warn!(err; "Failed to build invereted index applier"))
         .ok()

src/mito2/src/sst/file.rs

@@ -149,6 +149,7 @@ impl FileMeta {
     pub fn inverted_index_available(&self) -> bool {
         self.available_indexes.contains(&IndexType::InvertedIndex)
     }
+
     pub fn fulltext_index_available(&self) -> bool {
         self.available_indexes.contains(&IndexType::FulltextIndex)
     }

src/mito2/src/sst/index/inverted_index/applier.rs

@@ -22,6 +22,7 @@ use index::inverted_index::search::index_apply::{
     ApplyOutput, IndexApplier, IndexNotFoundStrategy, SearchContext,
 };
 use object_store::ObjectStore;
+use puffin::puffin_manager::cache::PuffinMetadataCacheRef;
 use puffin::puffin_manager::{BlobGuard, PuffinManager, PuffinReader};
 use snafu::ResultExt;
 use store_api::storage::RegionId;
@@ -60,6 +61,9 @@ pub(crate) struct InvertedIndexApplier {
 
     /// In-memory cache for inverted index.
     inverted_index_cache: Option<InvertedIndexCacheRef>,
+
+    /// Puffin metadata cache.
+    puffin_metadata_cache: Option<PuffinMetadataCacheRef>,
 }
 
 pub(crate) type InvertedIndexApplierRef = Arc<InvertedIndexApplier>;
@@ -70,8 +74,6 @@ impl InvertedIndexApplier {
         region_dir: String,
         region_id: RegionId,
         store: ObjectStore,
-        file_cache: Option<FileCacheRef>,
-        index_cache: Option<InvertedIndexCacheRef>,
         index_applier: Box<dyn IndexApplier>,
         puffin_manager_factory: PuffinManagerFactory,
     ) -> Self {
@@ -81,13 +83,35 @@ impl InvertedIndexApplier {
             region_dir,
             region_id,
             store,
-            file_cache,
+            file_cache: None,
             index_applier,
             puffin_manager_factory,
-            inverted_index_cache: index_cache,
+            inverted_index_cache: None,
+            puffin_metadata_cache: None,
         }
     }
 
+    /// Sets the file cache.
+    pub fn with_file_cache(mut self, file_cache: Option<FileCacheRef>) -> Self {
+        self.file_cache = file_cache;
+        self
+    }
+
+    /// Sets the index cache.
+    pub fn with_index_cache(mut self, index_cache: Option<InvertedIndexCacheRef>) -> Self {
+        self.inverted_index_cache = index_cache;
+        self
+    }
+
+    /// Sets the puffin metadata cache.
+    pub fn with_puffin_metadata_cache(
+        mut self,
+        puffin_metadata_cache: Option<PuffinMetadataCacheRef>,
+    ) -> Self {
+        self.puffin_metadata_cache = puffin_metadata_cache;
+        self
+    }
+
     /// Applies predicates to the provided SST file id and returns the relevant row group ids
     pub async fn apply(&self, file_id: FileId) -> Result<ApplyOutput> {
         let _timer = INDEX_APPLY_ELAPSED
@@ -105,6 +129,7 @@ impl InvertedIndexApplier {
                 if let Err(err) = other {
                     warn!(err; "An unexpected error occurred while reading the cached index file. Fallback to remote index file.")
                 }
+
                 self.remote_blob_reader(file_id).await?
             }
         };
@@ -157,7 +182,10 @@ impl InvertedIndexApplier {
 
     /// Creates a blob reader from the remote index file.
     async fn remote_blob_reader(&self, file_id: FileId) -> Result<BlobReader> {
-        let puffin_manager = self.puffin_manager_factory.build(self.store.clone());
+        let puffin_manager = self
+            .puffin_manager_factory
+            .build(self.store.clone())
+            .with_puffin_metadata_cache(self.puffin_metadata_cache.clone());
         let file_path = location::index_file_path(&self.region_dir, file_id);
         puffin_manager
             .reader(&file_path)
@@ -219,8 +247,6 @@ mod tests {
             region_dir.clone(),
             RegionId::new(0, 0),
             object_store,
-            None,
-            None,
             Box::new(mock_index_applier),
             puffin_manager_factory,
         );
@@ -261,8 +287,6 @@ mod tests {
             region_dir.clone(),
             RegionId::new(0, 0),
             object_store,
-            None,
-            None,
             Box::new(mock_index_applier),
             puffin_manager_factory,
         );

src/mito2/src/sst/index/inverted_index/applier/builder.rs

@@ -28,6 +28,7 @@ use datatypes::value::Value;
 use index::inverted_index::search::index_apply::PredicatesIndexApplier;
 use index::inverted_index::search::predicate::Predicate;
 use object_store::ObjectStore;
+use puffin::puffin_manager::cache::PuffinMetadataCacheRef;
 use snafu::{OptionExt, ResultExt};
 use store_api::metadata::RegionMetadata;
 use store_api::storage::ColumnId;
@@ -65,31 +66,54 @@ pub(crate) struct InvertedIndexApplierBuilder<'a> {
 
     /// Cache for inverted index.
     index_cache: Option<InvertedIndexCacheRef>,
+
+    /// Cache for puffin metadata.
+    puffin_metadata_cache: Option<PuffinMetadataCacheRef>,
 }
 
 impl<'a> InvertedIndexApplierBuilder<'a> {
     /// Creates a new [`InvertedIndexApplierBuilder`].
     pub fn new(
         region_dir: String,
         object_store: ObjectStore,
-        file_cache: Option<FileCacheRef>,
-        index_cache: Option<InvertedIndexCacheRef>,
         metadata: &'a RegionMetadata,
         indexed_column_ids: HashSet<ColumnId>,
         puffin_manager_factory: PuffinManagerFactory,
     ) -> Self {
         Self {
             region_dir,
             object_store,
-            file_cache,
             metadata,
             indexed_column_ids,
             output: HashMap::default(),
-            index_cache,
             puffin_manager_factory,
+            file_cache: None,
+            index_cache: None,
+            puffin_metadata_cache: None,
         }
     }
 
+    /// Sets the file cache.
+    pub fn with_file_cache(mut self, file_cache: Option<FileCacheRef>) -> Self {
+        self.file_cache = file_cache;
+        self
+    }
+
+    /// Sets the puffin metadata cache.
+    pub fn with_puffin_metadata_cache(
+        mut self,
+        puffin_metadata_cache: Option<PuffinMetadataCacheRef>,
+    ) -> Self {
+        self.puffin_metadata_cache = puffin_metadata_cache;
+        self
+    }
+
+    /// Sets the index cache.
+    pub fn with_index_cache(mut self, index_cache: Option<InvertedIndexCacheRef>) -> Self {
+        self.index_cache = index_cache;
+        self
+    }
+
     /// Consumes the builder to construct an [`InvertedIndexApplier`], optionally returned based on
     /// the expressions provided. If no predicates match, returns `None`.
     pub fn build(mut self, exprs: &[Expr]) -> Result<Option<InvertedIndexApplier>> {
@@ -108,15 +132,18 @@ impl<'a> InvertedIndexApplierBuilder<'a> {
             .collect();
         let applier = PredicatesIndexApplier::try_from(predicates);
 
-        Ok(Some(InvertedIndexApplier::new(
-            self.region_dir,
-            self.metadata.region_id,
-            self.object_store,
-            self.file_cache,
-            self.index_cache,
-            Box::new(applier.context(BuildIndexApplierSnafu)?),
-            self.puffin_manager_factory,
-        )))
+        Ok(Some(
+            InvertedIndexApplier::new(
+                self.region_dir,
+                self.metadata.region_id,
+                self.object_store,
+                Box::new(applier.context(BuildIndexApplierSnafu)?),
+                self.puffin_manager_factory,
+            )
+            .with_file_cache(self.file_cache)
+            .with_puffin_metadata_cache(self.puffin_metadata_cache)
+            .with_index_cache(self.index_cache),
+        ))
     }
 
     /// Recursively traverses expressions to collect predicates.
@@ -322,8 +349,6 @@ mod tests {
         let mut builder = InvertedIndexApplierBuilder::new(
             "test".to_string(),
             test_object_store(),
-            None,
-            None,
             &metadata,
             HashSet::from_iter([1, 2, 3]),
             facotry,

src/mito2/src/sst/index/inverted_index/applier/builder/between.rs

@@ -75,8 +75,6 @@ mod tests {
         let mut builder = InvertedIndexApplierBuilder::new(
             "test".to_string(),
             test_object_store(),
-            None,
-            None,
             &metadata,
             HashSet::from_iter([1, 2, 3]),
             facotry,
@@ -118,8 +116,6 @@ mod tests {
         let mut builder = InvertedIndexApplierBuilder::new(
             "test".to_string(),
             test_object_store(),
-            None,
-            None,
             &metadata,
             HashSet::from_iter([1, 2, 3]),
             facotry,
@@ -144,8 +140,6 @@ mod tests {
         let mut builder = InvertedIndexApplierBuilder::new(
             "test".to_string(),
             test_object_store(),
-            None,
-            None,
             &metadata,
             HashSet::from_iter([1, 2, 3]),
             facotry,
@@ -187,8 +181,6 @@ mod tests {
         let mut builder = InvertedIndexApplierBuilder::new(
             "test".to_string(),
             test_object_store(),
-            None,
-            None,
             &metadata,
             HashSet::from_iter([1, 2, 3]),
             facotry,
@@ -214,8 +206,6 @@ mod tests {
         let mut builder = InvertedIndexApplierBuilder::new(
             "test".to_string(),
             test_object_store(),
-            None,
-            None,
             &metadata,
             HashSet::from_iter([1, 2, 3]),
             facotry,