Struct SegmentEntry 

pub struct SegmentEntry {
    pub segment_id: SegmentId,
    pub extent: Extent,
    pub generation: u64,
    pub data_len: u64,
}

An entry in the segment directory mapping a segment to its block location.

Each live segment is tracked in the metadata root block. The generation counter supports snapshot isolation — readers see a consistent view of which segments existed at their open time.

See [[architecture-storage-format#Root Metadata]].

Fields

segment_id: SegmentId

Unique identifier for this segment.

extent: Extent

Contiguous block range where the segment data is stored.

generation: u64

Monotonically increasing version counter. Incremented on each commit that modifies the segment directory.

data_len: u64

Actual byte length of the segment data. May be less than extent.byte_len() since the last block can be partially filled.

Implementations

impl SegmentEntry

pub const fn new( segment_id: SegmentId, extent: Extent, generation: u64, data_len: u64, ) -> Self

Trait Implementations

impl Clone for SegmentEntry

fn clone(&self) -> SegmentEntry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SegmentEntry

impl Debug for SegmentEntry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for SegmentEntry

impl PartialEq for SegmentEntry

fn eq(&self, other: &SegmentEntry) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SegmentEntry