Enum ReplicaState 

pub enum ReplicaState {
    Primary,
    Replica,
    CatchingUp {
        progress: f64,
    },
    Failed,
}

Lifecycle state of a single shard replica.

Variants

Primary

This replica is the authoritative writer for the shard.

Replica

This replica is fully synchronized and serves read requests.

CatchingUp

This replica is receiving a delta stream; progress is in [0.0, 1.0].

Fields

progress: f64

Fraction of the sync work completed (0.0 = just started, 1.0 = done).

Failed

This replica has experienced a failure and is no longer serving requests.

Implementations

impl ReplicaState

pub fn is_healthy(&self) -> bool

Returns true for states that can serve read requests.

pub fn is_primary(&self) -> bool

Returns true if this replica is the primary.

Trait Implementations

impl Clone for ReplicaState

fn clone(&self) -> ReplicaState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReplicaState

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

Formats the value using the given formatter.

impl PartialEq for ReplicaState

fn eq(&self, other: &ReplicaState) -> 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 StructuralPartialEq for ReplicaState