ElastiCache er AWSs administrerte in-memory caching-tjeneste — kjører Redis eller Memcached for å cache hyppig brukt data for rask henting. Kombinert med andre cache-lag (CloudFront, DAX), er caching en nøkkelteknikk for å forbedre AWS-applikasjonsytelse og redusere databasebelastning.
ElastiCache — administrert in-memory caching
ElastiCache runs managed REDIS or MEMCACHED clusters:
→ store frequently-accessed data in memory → sub-millisecond retrieval (very fast)
→ REDUCE LOAD on databases (serve from cache instead of querying the DB)
→ AWS manages it (setup, patching, scaling, failover) — no servers to run
Redis → rich data structures, persistence, replication, HA (Multi-AZ) — the common choice
Memcached → simpler, multi-threaded, pure caching
