pub struct RawSegmentDesc {
pub start_offset: Offset,
pub last_offset: Offset,
pub region: Option<FileRegion>,
}Expand description
Descriptor form of Segment::read_raw for the zero-copy fetch path,
Increments D + E.
This type carries the same offset and boundary metadata, but the
records run is a krabka_protocol::records::FileRegion descriptor of
the form (Arc<File>, offset, len), not an owned Bytes slice. The
broker can therefore sendfile(2) the run straight from the page cache
with no userspace copy. This type is compiled on the SENDFILE alias:
Linux, Apple, and FreeBSD/DragonFly.
Fields§
§start_offset: Offsetbase_offset of the first included batch (≤ requested offset).
last_offset: OffsetLast absolute offset covered by the region (start_offset - 1 if empty).
region: Option<FileRegion>The records run, as a file-backed descriptor. None when the walk
found no complete batch in range.
Implementations§
Trait Implementations§
Source§impl Clone for RawSegmentDesc
impl Clone for RawSegmentDesc
Source§fn clone(&self) -> RawSegmentDesc
fn clone(&self) -> RawSegmentDesc
1.0.0 (const: unstable) · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreAuto Trait Implementations§
impl Freeze for RawSegmentDesc
impl RefUnwindSafe for RawSegmentDesc
impl Send for RawSegmentDesc
impl Sync for RawSegmentDesc
impl Unpin for RawSegmentDesc
impl UnsafeUnpin for RawSegmentDesc
impl UnwindSafe for RawSegmentDesc
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