Struct Wal 

pub struct Wal { /* private fields */ }

Append-only write-ahead log.

Implementations

impl Wal

pub fn open(dir_path: &Path) -> MenteResult<Self>

Open or create a WAL file at dir_path/wal.log.

pub fn append( &mut self, entry_type: WalEntryType, page_id: u64, data: &[u8], ) -> MenteResult<Lsn>

Append an entry to the WAL and return its LSN.

pub fn sync(&mut self) -> MenteResult<()>

Flush the WAL to durable storage (fdatasync).

pub fn iterate(&mut self) -> MenteResult<Vec<WalEntry>>

Read all valid entries from the WAL for recovery.

pub fn truncate(&mut self, before_lsn: Lsn) -> MenteResult<()>

Truncate all entries with LSN less than before_lsn.

pub fn next_lsn(&self) -> Lsn

Current next LSN (useful for external callers).