Struct CacheRadiusTracker 

pub struct CacheRadiusTracker { /* private fields */ }

Per-location TTL store of the walk’s cache radius.

The cache radius is the minimum LeadingAgreementBits of all servers that returned data during the previous walk. It represents how far out caching has propagated: all servers with LAB ≥ radius are likely to already hold cached data, so future walks can try a little further out, thereby alleviating load.

Implementations

impl CacheRadiusTracker

pub fn new(ttl: DurationMillis) -> Self

pub fn get( &self, location_id: Id, now: TimeMillis, ) -> Option<LeadingAgreementBits>

Returns the cached radius if it has not expired.

pub fn update( &self, location_id: Id, radius: LeadingAgreementBits, now: TimeMillis, )

Replaces the stored radius unconditionally (each walk produces a fresh observation).