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SegmentExport

krabka_log

Struct SegmentExport 

Source 
pub struct SegmentExport {
    pub base_offset: Offset,
    pub last_offset: Offset,
    pub max_timestamp: i64,
    pub last_modified_ms: i64,
    pub size: ByteSize,
    pub log_path: PathBuf,
    pub offset_index_path: PathBuf,
    pub time_index_path: PathBuf,
    pub transaction_index_path: Option<PathBuf>,
    pub producer_snapshot_path: PathBuf,
    pub leader_epochs: Vec<(LeaderEpoch, Offset)>,
}
Expand description

A sealed segment described for tiered-storage offload (KIP-405).

It carries the on-disk file paths, the offset, timestamp, and size metadata, and the leader-epoch ranges that a RemoteLogManager needs to build remote-segment metadata. Log::tierable_segments produces these values.

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§base_offset: Offset

First absolute offset in the segment.

§last_offset: Offset

Last absolute offset (inclusive) in the segment.

§max_timestamp: i64

Kafka’s LogSegment.largestTimestamp(), which is what Kafka’s copy records as the remote segment’s maxTimestampMs: the highest record timestamp in the segment, or SegmentExport::last_modified_ms when no record carries a non-negative one.

§last_modified_ms: i64

Kafka’s LogSegment.lastModified(): the .log file’s modification time in epoch milliseconds, or 0 when the filesystem cannot say, as File.lastModified() answers. Kafka’s tiered local retention ages a segment whose records claim a future timestamp by this instead.

§size: ByteSize

.log file size.

§log_path: PathBuf

Path to the .log data file.

§offset_index_path: PathBuf

Path to the .index (offset index) file.

§time_index_path: PathBuf

Path to the .timeindex file.

§transaction_index_path: Option<PathBuf>

Path to the .txnindex file, present only when it exists on disk.

§producer_snapshot_path: PathBuf

Producer-state snapshot at last_offset + 1.

§leader_epochs: Vec<(LeaderEpoch, Offset)>

Leader epochs whose coverage overlaps [base_offset, last_offset], as (epoch, start_offset) clamped to base_offset, ordered by offset. May be empty when no epochs were recorded for this log.

Trait Implementations§

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impl Clone for SegmentExport

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fn clone(&self) -> SegmentExport

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for SegmentExport

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

Formats the value using the given formatter. Read more
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impl PartialEq for SegmentExport

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for SegmentExport

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