Struct TierPolicy 

pub struct TierPolicy {
    pub tier: StorageTier,
    pub max_age_ms: Option<u64>,
    pub min_access_count: Option<u64>,
    pub max_block_size_bytes: Option<u64>,
    pub min_block_size_bytes: Option<u64>,
}

Policy that governs when blocks should be demoted out of a given tier.

All specified conditions are evaluated independently: the first one that triggers causes a demotion. None means “no limit / don’t check”.

Fields

tier: StorageTier

The tier this policy applies to.

max_age_ms: Option<u64>

Maximum idle time in milliseconds. Blocks whose last_accessed_ms + max_age_ms < now_ms are considered stale.

min_access_count: Option<u64>

Minimum access count required to stay in this tier. Blocks with fewer accesses than this threshold are under-accessed.

max_block_size_bytes: Option<u64>

Blocks larger than this byte count should not reside in this tier.

min_block_size_bytes: Option<u64>

Blocks smaller than this byte count should not reside in this tier.

Trait Implementations

impl Clone for TierPolicy

fn clone(&self) -> TierPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TierPolicy

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

Formats the value using the given formatter.