Module segments 

Segment access abstractions for layouts.

Layouts refer to byte ranges by SegmentId. A SegmentSource resolves those ids to buffer handles for readers, while a SegmentSink assigns ids when writers emit buffers. SegmentCache implementations can sit in front of sources to reuse segment bytes across scans.

Structs

InstrumentedSegmentCache

Wrapper for SegmentCache that tracks its hit rate.

MokaSegmentCache

A SegmentCache based around an in-memory Moka cache.

NoOpSegmentCache

Segment cache implementation that never stores anything.

SegmentCacheSourceAdapter

SegmentSource wrapper that consults a SegmentCache before the underlying source.

SegmentId

Identifier for a single physical segment referenced by a layout.

SharedSegmentSource

A SegmentSource that allows multiple requesters to await the same underlying segment request.

TestSegments

A dummy in-memory implementation of a segment reader and writer.

Traits

SegmentCache

Cache for individual segment byte buffers.

SegmentSink

Assigns segment ids and writes segment buffers during layout writing.

SegmentSource

Provides segment data to a crate::LayoutReader.

Type Aliases

SegmentFuture

Static future resolving to a segment byte buffer.

SegmentSinkRef

Shared writer-side segment sink.