Struct MaintenancePolicy 

pub struct MaintenancePolicy {
    pub compaction_fragment_cap: usize,
    pub cleanup_older_than: Duration,
    pub cleanup_interval: u64,
    pub scalar_fold_row_threshold: usize,
    pub index_fold_row_threshold: usize,
}

Resolved per-call inputs to the storage-maintenance pass. Built from [maintenance] (and any per-invocation CLI override) at the entry point; threaded down to optimize_table_compact so the substrate never re-reads Config itself.

Fields

compaction_fragment_cap: usize

See DEFAULT_COMPACTION_FRAGMENT_CAP; 0 disables the veto.

cleanup_older_than: Duration

Manifest-retention window handed to cleanup_old_versions.

cleanup_interval: u64

Run cleanup_old_versions for a table only when its manifest version is a multiple of this (1 = every optimize). The frequent pond sync path raises it so most syncs skip the version-log walk; see DEFAULT_SYNC_CLEANUP_INTERVAL.

scalar_fold_row_threshold: usize

Defer a scalar (BTree/bitmap) index fold until its unindexed tail reaches this many rows; 0 folds every run. The frequent pond sync path raises it so most syncs skip the full scalar-index rewrite Lance 7.0.0 does on every fold; see DEFAULT_SYNC_SCALAR_FOLD_ROWS.

index_fold_row_threshold: usize

Defer the FTS + vector (IVF) index fold until its unindexed tail reaches this many rows; 0 folds every run. The frequent pond sync path raises it so most syncs skip the per-fold S3 round-trip storm; recall stays complete because the retrievers flat-scan the deferred tail. See DEFAULT_SYNC_INDEX_FOLD_ROWS.

Implementations

impl MaintenancePolicy

pub fn always_compact() -> Self

Veto off: run every task Lance plans (the optimize tests assume this).

pub fn with_cleanup_interval(self, interval: u64) -> Self

Amortize version cleanup over interval commits - the frequent pond sync path uses this so most syncs skip the version-log walk.

pub fn with_scalar_fold_row_threshold(self, threshold: usize) -> Self

Amortize the scalar-index fold over its unindexed tail - the frequent pond sync path uses this so most syncs skip the full scalar-index rewrite Lance 7.0.0 does on every fold.

pub fn with_index_fold_row_threshold(self, threshold: usize) -> Self

Amortize the FTS + vector fold over its unindexed tail - the frequent pond sync path uses this so most syncs skip the per-fold S3 round-trip storm; recall stays complete via the retrievers’ tail flat-scan.

Trait Implementations

impl Clone for MaintenancePolicy

fn clone(&self) -> MaintenancePolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MaintenancePolicy

impl Debug for MaintenancePolicy

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

Formats the value using the given formatter.