Struct CompactionConfig 

pub struct CompactionConfig {
    pub min_bytes: u64,
    pub max_segments: usize,
    pub tombstone_grace: Duration,
    pub emit_snapshot: bool,
}

Coordinates background segment merges to keep disk usage and read amplification under control.

The intended lifecycle for a single compaction run is:

1. Inspect storage metadata and pick cold segments whose combined size exceeds min_bytes or whose live-data ratio falls below a future heuristic. We cap the batch using max_segments to avoid long stalls.
2. Stream the chosen segments in log order, retaining the newest value per key while skipping tombstones older than tombstone_grace.
3. Write the surviving entries into a fresh segment, fsync it, rebuild its sparse index/Bloom filter, and atomically swap it into Storage while removing the old segment files.
4. Optionally trigger snapshotting so restart time stays stable even as log history churns. Configuration for compaction behavior

Fields

min_bytes: u64

Minimum bytes needed before compaction runs

max_segments: usize

Maximum number of segments to compact at once

tombstone_grace: Duration

How long to keep tombstones before eviction

emit_snapshot: bool

Whether to emit a snapshot after compaction

Trait Implementations

impl Clone for CompactionConfig

fn clone(&self) -> CompactionConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompactionConfig

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

Formats the value using the given formatter.

impl Default for CompactionConfig

fn default() -> Self

Returns the “default value” for a type.