Struct WalWriterConfig 

pub struct WalWriterConfig {
    pub write_buffer_size: usize,
    pub alignment: usize,
    pub use_direct_io: bool,
    pub dwb_mode: Option<DwbMode>,
    pub time_anchors: Option<Arc<TimeAnchors>>,
}

Configuration for the WAL writer.

Fields

write_buffer_size: usize

Size of the aligned write buffer (rounded up to alignment).

alignment: usize

O_DIRECT alignment (typically 4096 for NVMe).

use_direct_io: bool

Whether to use O_DIRECT. Set to false for testing on filesystems that don’t support it (e.g., tmpfs).

dwb_mode: Option<DwbMode>

Double-write buffer I/O mode. None means “mirror the parent” — Direct when use_direct_io is true, Buffered otherwise. Some(DwbMode::Off) disables the DWB entirely.

time_anchors: Option<Arc<TimeAnchors>>

Commit-time anchors. When set, every sync that commits new records appends one TimeAnchor record to its batch and, once fsynced, records it here. None writes no anchors.

Trait Implementations

impl Clone for WalWriterConfig

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WalWriterConfig

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

Formats the value using the given formatter.

impl Default for WalWriterConfig

fn default() -> Self

Returns the “default value” for a type.