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Wal

featherdb_storage

Struct Wal 

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pub struct Wal { /* private fields */ }
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Write-Ahead Log manager with group commit support

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impl Wal

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pub fn open(path: &Path) -> Result<Self>

Open or create a WAL file with default configuration

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pub fn open_with_config( path: &Path, config: WalGroupCommitConfig, max_size: Option<u64>, ) -> Result<Self>

Open or create a WAL file with custom configuration

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pub fn current_lsn(&self) -> Lsn

Get the current LSN

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pub fn needs_recovery(&self) -> bool

Check if WAL has records that need recovery (non-empty WAL)

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pub fn stats(&self) -> &Arc<WalStats>

Get WAL statistics

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pub fn sync_mode(&self) -> WalSyncMode

Get the sync mode

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pub fn current_size(&self) -> u64

Get current WAL file size in bytes

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pub fn max_size(&self) -> Option<u64>

Get configured maximum WAL size (None if unlimited)

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pub fn append(&mut self, record: WalRecord) -> Result<Lsn>

Append a record to the WAL

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pub fn sync(&self) -> Result<()>

Sync the WAL to disk

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pub fn flush_group(&self) -> Result<Lsn>

Flush the group commit buffer (for group commit mode) Returns the LSN up to which records were synced

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pub fn truncate(&mut self) -> Result<()>

Truncate the WAL (after checkpoint)

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pub fn iter(&self) -> Result<WalIterator>

Iterate over all records in the WAL

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pub fn log_begin(&mut self, txn_id: TransactionId) -> Result<Lsn>

Log a transaction begin

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pub fn log_commit( &mut self, txn_id: TransactionId, prev_lsn: Lsn, ) -> Result<Lsn>

Log a transaction commit

In GroupCommit mode, this adds the commit to the buffer and waits for the group flush to complete before returning.

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pub fn log_abort(&mut self, txn_id: TransactionId, prev_lsn: Lsn) -> Result<Lsn>

Log a transaction abort

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pub fn log_write( &mut self, txn_id: TransactionId, prev_lsn: Lsn, page_id: u64, old_data: Vec<u8>, new_data: Vec<u8>, ) -> Result<Lsn>

Log a page write

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pub fn log_checkpoint(&mut self) -> Result<Lsn>

Log a checkpoint

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pub fn shutdown(&mut self) -> Result<()>

Shutdown the WAL gracefully

Trait Implementations§

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impl Drop for Wal

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fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

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impl !Freeze for Wal

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impl !RefUnwindSafe for Wal

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impl Send for Wal

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impl Sync for Wal

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impl Unpin for Wal

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impl UnsafeUnpin for Wal

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impl !UnwindSafe for Wal

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impl<T> Any for T
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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: UpperHex,

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