Expand description
The Rerun chunk store, implemented on top of Apache Arrow
using the arrow crate.
This crate is an in-memory time series database for Rerun log data.
It is indexed by Entity path, component, timeline, and time.
It supports out-of-order insertions, and fast O(log(N)) queries.
- See
ChunkStorefor an overview of the core data structures. - See
ChunkStore::latest_at_relevant_chunksandChunkStore::range_relevant_chunksfor the documentation of the public read APIs. - See
ChunkStore::insert_chunkfor the documentation of the public write APIs.
§Feature flags
deadlock_detection— Enablesparking_lot’s deadlock detection background thread.
Re-exports§
pub use re_chunk::Chunk;pub use re_chunk::ChunkId;pub use re_chunk::LatestAtQuery;pub use re_chunk::RangeQuery;pub use re_chunk::RangeQueryOptions;pub use re_chunk::RowId;pub use re_log_types::ResolvedTimeRange;pub use re_log_types::TimeInt;pub use re_log_types::TimeType;pub use re_log_types::Timeline;
Modules§
Structs§
- Chunk
Compaction Report - Reports which
Chunks were merged into a newChunkduring a compaction. - Chunk
Store - A complete chunk store: covers all timelines, all entities, everything.
- Chunk
Store Chunk Stats - Stats about a collection of chunks.
- Chunk
Store Config - Chunk
Store Diff - Describes an atomic change in the Rerun
ChunkStore: a chunk has been added or deleted. - Chunk
Store Event - The atomic unit of change in the Rerun
ChunkStore. - Chunk
Store Generation - Incremented on each edit.
- Chunk
Store Handle - A ref-counted, inner-mutable handle to a
ChunkStore. - Chunk
Store Stats - Chunk
Store Subscriber Handle - Column
Metadata - Component
Column Descriptor - Describes a data/component column, such as
Position3D, in a dataframe. - Garbage
Collection Options - Index
Column Descriptor - Describes a time column, such as
log_time. - Query
Expression - Describes a complete query for Rerun’s dataframe API.
- View
Contents Selector - The view contents specify which subset of the database (i.e., which columns) the query runs on,
expressed as a set of
EntityPaths and their associatedComponentNames.
Enums§
- Chunk
Store Diff Kind - Is it an addition or a deletion?
- Chunk
Store Error - Column
Descriptor - Garbage
Collection Target - Sparse
Fill Strategy - Specifies how null values should be filled in the returned dataframe.
Traits§
- Chunk
Store Subscriber - A
ChunkStoreSubscribersubscribes to atomic changes from allChunkStores throughChunkStoreEvents. - PerStore
Chunk Subscriber - A
ChunkStoreSubscriberthat is instantiated for each uniqueStoreId.