Caching
Cache key
Quick answer
A cache key is the string that identifies a cache entry, typically built from a hash of the lockfiles that determine the cached content.
A cache key is the string that identifies a cache entry, typically built from a hash of the lockfiles that determine the cached content.
Why it matters
Keys that include a commit SHA never hit. Keys that omit the lockfile serve stale content. The correct key hashes exactly the inputs that change the output, and nothing else.
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Related
Artifact cacheAn artifact cache stores build outputs between CI runs so that unchanged work does not have to be recomputed.Cache evictionCache eviction is the removal of cache entries to stay within a size limit, usually by discarding the least recently used entries first.Cache hit rateCache hit rate is the proportion of cache lookups that find a usable entry, expressed as a percentage.Cache scopeCache scope defines which workflows, branches and repositories may read a given cache entry.