Enum DurabilityMode 

pub enum DurabilityMode {
    Derived,
    Durable,
    Attached,
}

Selects whether this store must make acknowledged writes durable on its own.

The default is Derived. In that mode CommitTier is ignored and no synchronization primitive is issued at any tier. An application crash or process kill does not lose acknowledged writes because the operating-system page cache retains them and writes them out afterward. A power cut or kernel panic can lose recently acknowledged writes. Recovery truncates the log at the first record whose checksum fails, so the store remains structurally valid: the failure is a missing recent tail, never silently wrong data.

Selecting Derived asserts that another store is authoritative and this store can be rebuilt from it. A caller for whom this store is the only copy of the data must select Durable explicitly.

Variants

Derived

The default: another store is authoritative, this store is rebuildable, and synchronization is skipped regardless of CommitTier.

Durable

This store is the source of truth and applies the selected CommitTier.

Attached

Participates in a host transaction; v1 returns a typed unsupported error.

Trait Implementations

impl Clone for DurabilityMode

fn clone(&self) -> DurabilityMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DurabilityMode

impl Debug for DurabilityMode

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

Formats the value using the given formatter.

impl Default for DurabilityMode

fn default() -> DurabilityMode

Returns the “default value” for a type.

impl Eq for DurabilityMode

impl PartialEq for DurabilityMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DurabilityMode