cacheuri

Cacheuri is a conceptual caching abstraction used in distributed systems to represent a cached resource's identifier and its associated metadata. The term is used to describe the combination of a resource's URI and the data that governs its validity and retrieval from caches.

A cacheuri entry typically includes: the URI string, the time it was cached, an expiry time or TTL, a content hash or ETag for validation, the size of the cached payload, and metadata such as MIME type and relevant response headers. This collection of fields enables efficient lookup, validation, and reuse of cached content across different cache layers.

Operations on a cacheuri cache include storing a new entry after a fetch, retrieving an entry by URI, and validating or revalidating the cached content with the origin using mechanisms like If-Modified-Since and If-None-Match. Invalidation can occur when the origin reports changes, or when TTLs expire. Implementations may also support explicit invalidation through push notifications or cache coherence protocols.

In practice cacheuri is used in content delivery networks, reverse proxies, browser caches, and service meshes to coordinate cache keys, ensure efficient reuse of resources, and harmonize validation across edge nodes. Common eviction and coherence strategies apply, including LRU, LFU, and TTL-based expiry, as well as cross-cache invalidation and dissemination of updates to maintain consistency.

There is no formal standard named cacheuri; it relates to established HTTP caching concepts such as cache-control directives, ETags, and Last-Modified, and is often implemented to organize and optimize the use of these mechanisms across distributed caches. Related topics include HTTP caching, URI management, and content delivery networks.