Enum CompactionStrategy 

pub enum CompactionStrategy {
    Evict(f64),
    Retain(usize),
    Min(Box<CompactionStrategy>, Box<CompactionStrategy>),
    Max(Box<CompactionStrategy>, Box<CompactionStrategy>),
}

Strategy for choosing what to evict

Variants

Evict(f64)

Evict a percentage of messages

Retain(usize)

Retain the last N messages

Min(Box<CompactionStrategy>, Box<CompactionStrategy>)

Take minimum of two strategies (more conservative)

Max(Box<CompactionStrategy>, Box<CompactionStrategy>)

Take maximum of two strategies (more aggressive)

Implementations

impl CompactionStrategy

pub fn calculate_eviction_range( &self, messages: &[MessageMeta], retention_window: usize, ) -> Option<EvictionRange>

Calculate eviction range based on strategy

Arguments

• messages - Metadata about all messages
• retention_window - Minimum messages to always keep

Returns

The range of messages to evict, adjusted for safety

pub fn filter_droppable( messages: &[MessageMeta], range: &EvictionRange, ) -> Vec<usize>

Filter out droppable messages from a range Returns indices of non-droppable messages to summarize

Trait Implementations

impl Clone for CompactionStrategy

fn clone(&self) -> CompactionStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompactionStrategy

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

Formats the value using the given formatter.

impl Default for CompactionStrategy

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CompactionStrategy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CompactionStrategy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.