Struct EvictionParams 

pub struct EvictionParams {
    pub cache_size_mb: u64,
    pub disk_headroom_mb: u64,
    pub high_water_pct: u64,
    pub target_pct: u64,
    pub per_sweep_budget: u64,
    pub tick: Duration,
}

Resolved driver parameters. Every field is range-checked at config resolution (resolve_cache_into): high_water_pct ∈ [60, 95], target_pct ∈ [40, 90] and target_pct <= high_water_pct - 5 (the structural hysteresis gap), per_sweep_budget ∈ [1, 256], tick ∈ [1s, 60s]. The type itself carries no invariant — it is a wiring DTO with a single production construction site.

Fields

cache_size_mb: u64

Configured cache size in MiB; the upper bound on the ceiling (the disk clamp can only lower it, never raise it).

disk_headroom_mb: u64

Free disk in MiB the driver keeps unused on the cache_dir volume by any process (#1930). Each tick the effective ceiling is capped so the cache cannot grow into the last disk_headroom_mb of free space; below it, the driver evicts to claw disk back. 0 opts out of the disk clamp (only cache_size_mb binds).

high_water_pct: u64

Crossing this percentage of the effective ceiling starts a sweep.

target_pct: u64

A sweep runs until usage falls to this percentage. The gap to high_water_pct is the hysteresis that stops it flapping.

per_sweep_budget: u64

Maximum blobs released in one sweep, so a sweep cannot monopolize the store.

tick: Duration

How often the driver re-reads usage.

Trait Implementations

impl Clone for EvictionParams

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EvictionParams

impl Debug for EvictionParams

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

Formats the value using the given formatter.