NOTE – A new version of the Amazon ElastiCache User Guide is available at This is official Amazon Web Services (AWS) documentation for Amazon ElastiCache. Amazon ElastiCache is a web service that makes it easy to set up, manage, and scale distributed in-memory cache environments in the cloud. This guide explains the core components of Amazon ElastiCache and explains how to access the service by using the Query programming interface, the command-line interface, and the AWS Management Console, a browser-based graphical user interface for interacting with the service. This documentation is offered for free here as a Kindle book, or you can read it online or in PDF format at