Struct CompactionPlanner 

pub struct CompactionPlanner { /* private fields */ }

Compaction planner

Implementations

impl CompactionPlanner

pub fn new(config: CompactionConfig) -> Self

Create a new compaction planner

pub fn needs_l0_compaction(&self, l0_sstable_count: usize) -> bool

Check if L0 needs compaction

pub fn needs_level_compaction(&self, level: usize, level_size: u64) -> bool

Check if a level needs compaction

pub fn level_target_size(&self, level: usize) -> u64

Calculate target size for a level

pub fn plan_compaction( &self, source_level: usize, source_sstables: Vec<SSTableMetadata>, target_sstables: Vec<SSTableMetadata>, ) -> Option<CompactionTask>

Plan a compaction task (level-based strategy)

pub fn plan_size_tiered_compaction( &self, sstables: Vec<SSTableMetadata>, ) -> Option<CompactionTask>

Plan a size-tiered compaction task

Groups SSTables by similar size (within size_ratio of each other). When a tier has at least min_tier_size SSTables, they are merged.

pub fn group_by_size_tier( &self, sstables: Vec<SSTableMetadata>, ) -> Vec<SizeTier>

Group SSTables into size tiers

SSTables are grouped such that the largest file in a tier is at most size_ratio times the smallest file in the same tier.

pub fn find_overlapping_sstables( &self, source_sstables: &[SSTableMetadata], target_sstables: &[SSTableMetadata], ) -> Vec<SSTableMetadata>

Find overlapping SSTables in target level