Enum WalSyncMode 

pub enum WalSyncMode {
    Full,
    Normal,
    Off,
}

Durability mode for the WAL — analogous to SQLite’s PRAGMA synchronous combined with journal_mode=OFF.

• Full — every mutation appends a record and flush() calls sync_data() so the OS guarantees the bytes hit stable storage before the call returns. This is the default and the only safe choice when crash recovery must be perfect.

• Off — every append() and flush() is a zero-work no-op. No CRC, no BufWriter, no fsync, no recovery. This matches SQLite’s :memory: semantics and is the only way to compare apples-to-apples against in-memory engines in benches. Never use this in production — a crash loses every mutation since the last Catalog::checkpoint().

Variants

Full

Normal

Normal — every commit buffers its record through to the OS (BufWriter::flush, so the bytes are file-visible) and returns WITHOUT an fsync; a background flusher fsyncs on a fixed interval (NORMAL_FSYNC_INTERVAL). A process crash loses nothing (replay reads the bytes already in the OS page cache); an OS crash / power loss can lose only the unsynced tail (≤ one interval of writes). This is SQLite synchronous=NORMAL / Postgres synchronous_commit=off semantics: opt-in, bounded-loss, and ~15–40× faster single-row writes because the fsync leaves the commit/lock path.

Off

Trait Implementations

impl Clone for WalSyncMode

fn clone(&self) -> WalSyncMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WalSyncMode

impl Debug for WalSyncMode

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

Formats the value using the given formatter.

impl Default for WalSyncMode

fn default() -> WalSyncMode

Returns the “default value” for a type.

impl Eq for WalSyncMode

impl PartialEq for WalSyncMode

fn eq(&self, other: &WalSyncMode) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for WalSyncMode