ElastiCache

ElastiCache is a distributed in-memory cache environments in the AWS Cloud

ElastiCache works with both the Redis and Memcached engines

· Managed Redis / Memcached

· In memory data store, sub-millisecond latency

· Must provision an ec2 compute instance type

· Support for Clustering ( Redis) and Multi AZ, Read Replicas

· Security through IAM, Security Groups, KMS, Redis Auth

· Backup / Snapshot / point in time restore feature

· Managed and scheduled Maintenance

· Monitoring through Cloudwatch

· Use Case: Key/Value store, Frequent reads, less writes, cache results for DB queries, store session data for websites, cannot use SQL.

monitoring the ElastiCache engine, look for

§ cpu utilization

§ Swap usage

§ Evictions

§ Concurrent connections

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(Redis and Memcached) > distributed sticky sessions,