ElastiCache is a web service that makes it easy to deploy and run Memcached or Redis
protocol-compliant server nodes in the cloud. The in-memory caching provided by ElastiCache
can be used to significantly improve latency and throughput for many read-heavy application
workloads or compute-intensive workloads
Only the Memcached and Redis database engines can be used with ElastiCache, the others in
the list are all in-memory databases but are not supported