Struct Version

pub(crate) struct Version {
    pub(crate) metadata: RegionMetadataRef,
    pub(crate) memtables: Arc<MemtableVersion>,
    pub(crate) ssts: Arc<SstVersion>,
    pub(crate) flushed_entry_id: EntryId,
    pub(crate) flushed_sequence: SequenceNumber,
    pub(crate) truncated_entry_id: Option<EntryId>,
    pub(crate) compaction_time_window: Option<Duration>,
    pub(crate) options: RegionOptions,
}

Static metadata of a region.

Fields

metadata: RegionMetadataRef

Metadata of the region.

Altering metadata isn’t frequent, storing metadata in Arc to allow sharing metadata and reuse metadata when creating a new Version.

memtables: Arc<MemtableVersion>

Mutable and immutable memtables.

Wrapped in Arc to make clone of Version much cheaper.

ssts: Arc<SstVersion>

SSTs of the region.

flushed_entry_id: EntryId

Inclusive max WAL entry id of flushed data.

flushed_sequence: SequenceNumber

Inclusive max sequence of flushed data.

truncated_entry_id: Option<EntryId>

Latest entry id during the truncating table.

Used to check if it is a flush task during the truncating table.

compaction_time_window: Option<Duration>

Inferred compaction time window from flush.

If compaction options contain a time window, it will overwrite this value when creating a new version from the VersionBuilder.

options: RegionOptions

Options of the region.

Trait Implementations

impl Clone for Version

fn clone(&self) -> Version

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Version

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

Formats the value using the given formatter.