Enum NodeType 

pub enum NodeType {
    Electable,
    Monitor,
    Secondary,
    Arbiter,
}

The type of a node within a replication group.

Each node type determines what role the node can play in the group, whether it participates in elections, and whether it stores data.

Variants

Electable

An electable node that can serve as either master or replica. Electable nodes participate in elections and store a complete copy of the data.

Monitor

A monitor node that observes group state changes but does not participate in elections or store data. Monitors receive notifications about master changes and group membership.

Secondary

A secondary node that replicates data from the master but cannot be elected master. Secondary nodes do not participate in elections or contribute to quorum calculations.

Arbiter

An arbiter node used for tie-breaking in elections. Arbiters participate in elections and acknowledge transactions but do not store a full copy of the data.

Implementations

impl NodeType

pub fn is_electable(&self) -> bool

Returns true if this node type can participate in elections.

Electable nodes and arbiters participate in elections.

pub fn is_data_node(&self) -> bool

Returns true if this node type stores a full copy of the data.

Electable and secondary nodes are data nodes.

pub fn can_be_master(&self) -> bool

Returns true if this node type can become master.

Only electable nodes can become master.

Trait Implementations

impl Clone for NodeType

fn clone(&self) -> NodeType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NodeType

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

Formats the value using the given formatter.

impl Display for NodeType

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

Formats the value using the given formatter.

impl Hash for NodeType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for NodeType

fn eq(&self, other: &NodeType) -> 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 Copy for NodeType

impl Eq for NodeType

impl StructuralPartialEq for NodeType