Enum FsyncPolicy 

pub enum FsyncPolicy {
    Always,
    Periodic(Duration),
    Never,
}

How aggressively the persistence layer fsyncs to durable storage.

Snapshot saves honor Always and Never (and treat Periodic as Always, since a snapshot is a single write). For WAL appends, Periodic(interval) fsyncs no more than once per interval, trading a bounded window of un-fsynced tail records for throughput.

Examples

use iqdb_persist::FsyncPolicy;
use std::time::Duration;

let _ = FsyncPolicy::Always;
let _ = FsyncPolicy::Periodic(Duration::from_secs(1));
let _ = FsyncPolicy::Never;

Variants

Always

fsync every write.

Periodic(Duration)

fsync no more often than this interval (governs WAL appends).

Never

Never fsync. Fastest, weakest durability — appropriate for tests and tmpfs-backed paths only.

Trait Implementations

impl Clone for FsyncPolicy

fn clone(&self) -> FsyncPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FsyncPolicy

impl Debug for FsyncPolicy

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FsyncPolicy

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for FsyncPolicy

impl PartialEq for FsyncPolicy

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for FsyncPolicy

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FsyncPolicy