"Amazon ElastiCache"

Amazon ElastiCache 

Amazon ElastiCache is a web service that simplifies the setup and management of distributed in-memory caching environments. This service makes it easy and cost effective to provide a high-performance and scalable caching solution for your cloud applications. You can use Amazon ElastiCache in your applications to speed the deployment of cache clusters and reduce the administration required for a distributed cache environment. 

Data Access Patterns 

Retrieving a flat key from an in-memory cache will always be faster than the most optimized database query. You should evaluate the access pattern of the data before you decide to store it in cache. 

Cache Engines

Amazon ElastiCache allows you to quickly deploy clusters of two different types of popular cache engines: Memcached and Redis. At a high level, Memcached and Redis may seem similar, but they support a variety of different use cases and provide different functionality.