mito2::compaction::twcs

Struct TwcsPicker

Source 
pub struct TwcsPicker {
    pub max_active_window_runs: usize,
    pub max_active_window_files: usize,
    pub max_inactive_window_runs: usize,
    pub max_inactive_window_files: usize,
    pub time_window_seconds: Option<i64>,
    pub max_output_file_size: Option<u64>,
    pub append_mode: bool,
}
Expand description

TwcsPicker picks files of which the max timestamp are in the same time window as compaction candidates.

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§max_active_window_runs: usize

Max allowed sorted runs in active window.

§max_active_window_files: usize

Max allowed files in active window.

§max_inactive_window_runs: usize

Max allowed sorted runs in inactive windows.

§max_inactive_window_files: usize

Max allowed files in inactive windows.

§time_window_seconds: Option<i64>

Compaction time window in seconds.

§max_output_file_size: Option<u64>

Max allowed compaction output file size.

§append_mode: bool

Whether the target region is in append mode.

Implementations§

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impl TwcsPicker

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fn build_output( &self, time_windows: &mut BTreeMap<i64, Window>, active_window: Option<i64>, ) -> Vec<CompactionOutput>

Builds compaction output from files. For active writing window, we allow for at most max_active_window_runs files to alleviate fragmentation. For other windows, we allow at most 1 file at each window.

Trait Implementations§

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impl Debug for TwcsPicker

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

Formats the value using the given formatter. Read more
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impl Picker for TwcsPicker

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fn pick(&self, compaction_region: &CompactionRegion) -> Option<PickerOutput>

Picks input SST files for compaction.

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