Struct ReplicationFactor 

pub struct ReplicationFactor {
    pub reads: u8,
    pub writes: u8,
}

Quorum-based replication configuration.

A write quorum requires acknowledgement from at least writes nodes; a read quorum requires responses from at least reads nodes.

Fields

reads: u8

Number of read responses required to satisfy a quorum.

writes: u8

Number of write acknowledgements required to satisfy a quorum.

Implementations

impl ReplicationFactor

pub fn new(reads: u8, writes: u8) -> Self

Construct a new ReplicationFactor.

pub fn is_quorum_read_met(&self, responses: u8) -> bool

Return true if responses meets or exceeds the read quorum.

pub fn is_quorum_write_met(&self, responses: u8) -> bool

Return true if responses meets or exceeds the write quorum.

pub fn rf3() -> Self

Convenience constructor for a standard RF-3 cluster (R=2, W=2).

pub fn rf3_strong() -> Self

Convenience constructor for a strongly consistent RF-3 cluster (R+W > N, so R=3, W=3 for N=3).

Trait Implementations

impl Clone for ReplicationFactor

fn clone(&self) -> ReplicationFactor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ReplicationFactor

impl Debug for ReplicationFactor

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

Formats the value using the given formatter.

impl Default for ReplicationFactor

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ReplicationFactor

impl PartialEq for ReplicationFactor

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