Struct VersionSet 

pub struct VersionSet { /* private fields */ }

Manages multiple versions/snapshots of storage state.

Provides lock-free reads by allowing readers to hold references to older snapshots while compaction creates new versions.

Implementations

impl VersionSet

pub fn new() -> Self

Create a new version set with an empty initial snapshot

pub fn acquire(&self) -> SnapshotGuard

Acquire a snapshot for reading

Returns a guard that keeps the snapshot alive until dropped.

pub fn install(&self, snapshot: Snapshot)

Install a new snapshot

The old snapshot remains valid for existing readers.

pub fn create_snapshot(&self, column_groups: Vec<Vec<ColumnGroupRef>>) -> u64

Create and install a new snapshot with column groups

pub fn cleanup(&self)

Clean up old snapshots that have no readers

pub fn current_version(&self) -> u64

Get current version number

pub fn active_count(&self) -> usize

Get number of active snapshots (includes current)

pub fn stats(&self) -> VersionSetStatsSnapshot

Get statistics snapshot

Trait Implementations

impl Default for VersionSet

fn default() -> Self

Returns the “default value” for a type.