Module cache

Cache for the engine.

Modules

• cache_size 🔒
  Cache size of different cache value.
• file_cache 🔒
  A cache for files.
• index 🔒
• write_cache 🔒
  A write-through cache for remote object stores.

Structs

• CacheManager
  Manages cached data for the engine.
• CacheManagerBuilder
  Builder to construct a CacheManager.
• ColumnPagePath
  Path to column pages in the SST file.
• PageValue
  Cached row group pages for a column.
• SelectorResultKey
  Cache key for time series row selector result.
• SelectorResultValue
  Cached result for time series row selector.
• SstMetaKey 🔒
  Cache key (region id, file id) for SST meta.

Enums

• CacheStrategy
  Cache strategies that may only enable a subset of caches.
• PageKey
  Cache key for pages of a SST row group.

Constants

• FILE_TYPE 🔒
  Metrics type key for files on the local store.
• PAGE_TYPE 🔒
  Metrics type key for pages.
• SELECTOR_RESULT_TYPE 🔒
  Metrics type key for selector result cache.
• SST_META_TYPE 🔒
  Metrics type key for sst meta.
• VECTOR_TYPE 🔒
  Metrics type key for vector.

Functions

• meta_cache_weight 🔒
• page_cache_weight 🔒
• selector_result_cache_hit
  Increases selector cache hit metrics.
• selector_result_cache_miss
  Increases selector cache miss metrics.
• selector_result_cache_weight 🔒
• update_hit_miss 🔒
  Updates cache hit/miss metrics.
• vector_cache_weight 🔒

Type Aliases

• CacheManagerRef
• PageCache 🔒
  Maps (region, file, row group, column) to PageValue.
• SelectorResultCache 🔒
  Maps (file id, row group id, time series row selector) to SelectorResultValue.
• SstMetaCache 🔒
  Maps (region id, file id) to [ParquetMetaData].
• VectorCache 🔒
  Maps Value to a vector that holds this value repeatedly.