Enum GroupAffinity 

pub enum GroupAffinity {
    Spread,
    Pack,
    Pin(String),
}

Affinity hint for a single replica group’s placement.

Three behaviors:

• Spread: try to put each replica on a different node (default).
• Pack: bin-pack onto the fewest nodes that can fit.
• Pin: pin all replicas to a single node, identified either by node id ("id=2") or label match ("role=database").

Variants

Spread

Default: spread across distinct nodes.

Pack

Pack onto fewest nodes.

Pin(String)

Pin to a specific node selector.

Examples:

• Pin("id=2") — exact node id match
• Pin("zone=us-east-1a") — label match

Trait Implementations

impl Clone for GroupAffinity

fn clone(&self) -> GroupAffinity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroupAffinity

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

Formats the value using the given formatter.

impl Default for GroupAffinity

fn default() -> GroupAffinity

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GroupAffinity

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for GroupAffinity

impl PartialEq for GroupAffinity

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

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for GroupAffinity