Enum UnderCapacity 

pub enum UnderCapacity {
    Withdraw,
    EvictOldest,
}

Behavior when a replica falls below the channel’s retention requirement due to local disk pressure. The leader’s replication factor is a hard guarantee; replicas are best-effort under pressure.

Variants

Withdraw

Drop the replica role; fall through to greedy LRU if also enabled. The channel’s capability tag for this node is withdrawn and reads re-route to the leader. Default.

EvictOldest

Aggressively evict the oldest local data to maintain the channel’s retention even if total data exceeds disk. Trades older data for keeping the replication factor intact.

Trait Implementations

impl Clone for UnderCapacity

fn clone(&self) -> UnderCapacity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnderCapacity

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

Formats the value using the given formatter.

impl Default for UnderCapacity

fn default() -> UnderCapacity

Returns the “default value” for a type.

impl PartialEq for UnderCapacity

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

impl Eq for UnderCapacity

impl StructuralPartialEq for UnderCapacity