Enum ReadConsistencyPolicy 

pub enum ReadConsistencyPolicy {
    LeaseRead,
    LinearizableRead,
    EventualConsistency,
}

Policy for read operation consistency guarantees

Determines the trade-off between read consistency and performance. Clients can choose the appropriate level based on their requirements.

Variants

LeaseRead

Lease-based reads for better performance with weaker consistency

The leader serves reads locally without contacting followers during the valid lease period. Assumes bounded clock drift between nodes. Provides lower latency but slightly weaker consistency guarantees compared to LinearizableRead.

LinearizableRead

Fully linearizable reads for strongest consistency

The leader verifies its leadership with a quorum before serving the read, ensuring strict linearizability. This guarantees that all reads reflect the most recent committed value in the cluster.

EventualConsistency

Eventually consistent reads from any node

Allows reading from any node (leader, follower, or candidate) without additional consistency checks. May return stale data but provides best read performance and availability. Suitable for scenarios where eventual consistency is acceptable. Can be served by non-leader nodes.

Trait Implementations

impl Clone for ReadConsistencyPolicy

fn clone(&self) -> ReadConsistencyPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReadConsistencyPolicy

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

Formats the value using the given formatter.

impl Default for ReadConsistencyPolicy

fn default() -> ReadConsistencyPolicy

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ReadConsistencyPolicy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<ReadConsistencyPolicy> for ReadConsistencyPolicy

fn from(proto_policy: ReadConsistencyPolicy) -> Self

Converts to this type from the input type.

impl From<ReadConsistencyPolicy> for ReadConsistencyPolicy

fn from(config_policy: ReadConsistencyPolicy) -> Self

Converts to this type from the input type.

impl PartialEq for ReadConsistencyPolicy

fn eq(&self, other: &ReadConsistencyPolicy) -> 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 ReadConsistencyPolicy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ReadConsistencyPolicy

impl StructuralPartialEq for ReadConsistencyPolicy