Release: AWS SDK for Node.js v1.5.2

Amazon ElastiCache now offers the Redis cache engine software, in addition to Memcached. Customers who currently use Redis can optionally "seed" a new ElastiCache Redis cache cluster with their existing data from a Redis snapshot file, easing migration to a managed ElastiCache environment. In addition, to support Redis replication capabilities, the ElastiCache API now supports replication groups: Customers can create a replication group with a primary Redis cache node, and add one or more read replica nodes that automatically stay synchronized with cache data in the primary node. Read-intensive applications can be offloaded to a read replica, reducing the load on the primary node. Read replicas can also guard against data loss in the event of a primary cache node failure.