Amazon ElastiCache Multi-AZ Placement

Amazon ElastiCache can be configured in Multi-AZ setup (or as they call it "Flexible Node Placement"). Your Memcached Cache Clusters can now span multiple Availability Zones within a Region, improving reliability and availability of the Cluster. And, if you are still using old cache.m1 instances, see this article about new M3 and R3 instances and upgrade for better and more reliable hardware.

You can now choose the Availability Zone for new nodes when you create a new Cache Cluster or add more nodes to an existing Cluster. You can specify the new desired number of nodes in each Availability Zone or you can simply choose the Spread Nodes Across Zones option.

The feature is available exclusively to memcached cluster only.

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