pub enum IndexType {
Offset,
Timestamp,
ProducerSnapshot,
LeaderEpoch,
Transaction,
}Expand description
The kinds of index a segment carries alongside its .log data.
Mirrors Kafka’s RemoteStorageManager.IndexType. A
RemoteStorageManager copies all of these on
RemoteStorageManager::copy_log_segment_data and serves any of them
back on RemoteStorageManager::fetch_index.
suffix is the Kafka LocalTieredStorage filename suffix of each index
type. Its remote leader-epoch artifact uses .leader_epoch_checkpoint,
distinct from a partition log’s local leader-epoch-checkpoint file.
from_suffix is its inverse. A reader that discovers an archive from the
object store alone identifies each artifact by the suffix of its key, and
every key that is not an index ends in LOG_FILE_SUFFIX, so None means
“not an index”. ALL lists every index kind, so a caller that has to act
on all of them – such as dropping one segment’s whole cache footprint –
cannot silently miss one that is added later.
Variants§
Offset
Sparse offset → byte-position index (.index).
Timestamp
Sparse timestamp → relative-offset index (.timeindex).
ProducerSnapshot
Producer id snapshot (.snapshot).
LeaderEpoch
Leader-epoch checkpoint (.leader_epoch_checkpoint in Kafka’s
LocalTieredStorage).
Transaction
Aborted-transaction index (.txnindex). It is optional. A segment
with no aborted transactions has none.
Implementations§
Trait Implementations§
impl Copy for IndexType
impl Eq for IndexType
impl StructuralPartialEq for IndexType
Auto Trait Implementations§
impl Freeze for IndexType
impl RefUnwindSafe for IndexType
impl Send for IndexType
impl Sync for IndexType
impl Unpin for IndexType
impl UnsafeUnpin for IndexType
impl UnwindSafe for IndexType
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