pub trait WalAdmin:
Send
+ Sync
+ 'static {
// Required methods
fn checkpoint(&self, path: &Path) -> Result<SnapshotMeta>;
fn wal_status(&self) -> Result<WalStatus>;
fn wal_truncate(&self, fence_lsn: u64) -> Result<()>;
}Expand description
Storage-agnostic admin surface for the WAL.
Database<InMemoryGraph> picks up the blanket impl below when a
WAL is attached. Transports (e.g. lora-server) type-erase on
Arc<dyn WalAdmin> so they don’t need to name the backend type
parameter.
All LSNs cross the trait boundary as raw u64 so callers don’t
need a dependency on lora-wal.
Required Methods§
Sourcefn checkpoint(&self, path: &Path) -> Result<SnapshotMeta>
fn checkpoint(&self, path: &Path) -> Result<SnapshotMeta>
Take a checkpoint at path. The snapshot’s header is stamped
with the WAL’s durable_lsn; older sealed segments are then
dropped.
Sourcefn wal_status(&self) -> Result<WalStatus>
fn wal_status(&self) -> Result<WalStatus>
Snapshot of the WAL’s current state — durable / next LSN, active / oldest segment id. Cheap; a single WAL mutex acquisition.
Sourcefn wal_truncate(&self, fence_lsn: u64) -> Result<()>
fn wal_truncate(&self, fence_lsn: u64) -> Result<()>
Drop sealed segments at or below fence_lsn. Idempotent.