CachingKoordination
CachingKoordination, or caching coordination, refers to the set of techniques and mechanisms used to coordinate caches across distributed systems. Its aim is to keep cached data reasonably fresh while allowing fast data access and reducing load on primary data stores. The term is used in discussions of web caches, distributed caches, and microservice architectures that rely on in-memory caching.
Core objectives include preventing stale reads, avoiding cache stampedes, and scaling read operations. Coordination decisions typically
Common strategies include invalidation-based schemes (invalidate on writes), update-based schemes (publish updates to caches), time-to-live (TTL)
Consistency models range from strong (coordinated across nodes) to eventual or causal consistency. Trade-offs involve latency,
Architectures vary from central coordinators that issue invalidations or leases to fully distributed protocols and directory-based
Common challenges include invalidation storms, clock drift, hot keys, and coordinating across data centers. Real-world systems