Struct CompactionUnit 

pub(crate) struct CompactionUnit {
    pub(crate) inputs: Vec<FileHandle>,
    pub(crate) outputs: Vec<CompactionOutput>,
    pub(crate) time_window_size: i64,
    pub(crate) max_file_size: Option<usize>,
}

A complete input dependency group, merged and published atomically.

Logical outputs retain their original input sets and time bounds. In particular, splitting physical SSTs must never split a strict-window input dependency group.

Fields

inputs: Vec<FileHandle>

Distinct input SSTs reserved and removed together.

outputs: Vec<CompactionOutput>

Original logical outputs; empty for expiration-only maintenance.

time_window_size: i64

Compaction window size in seconds.

max_file_size: Option<usize>

Maximum physical output SST size in bytes.

Implementations

impl CompactionUnit

pub(crate) fn from_picker(output: PickerOutput) -> Option<Vec<Self>>

Groups outputs by the transitive closure of shared input FileIds. Returns None for an inconsistent plan that both expires and merges a file. Expiration maintenance runs before merge units, matching the legacy pre-merge removal. Merge units follow the legacy compactor’s tail-first execution order; a shared-input group inherits the position of its highest-priority output.

pub(crate) fn estimated_memory_bytes(&self) -> u64

Estimates merge memory once per input, even when several outputs read it.

Trait Implementations

impl Clone for CompactionUnit

fn clone(&self) -> CompactionUnit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompactionUnit

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

Formats the value using the given formatter.