Redis 2.8.21We are pleased to announce that Amazon ElastiCache now supports Redis version 2.8.21. Customers can launch unique clusters with Redis 2.8.21, as well as upgrade existing ones to the unique engine version.
For the full list of improvements in Redis 2.8.21 click here. You can easily launch an ElastiCache for Redis cluster with engine version 2.8.21 via a few clicks on the AWS Management Console.
Source: amazon.com