How do I turn on Multi-AZ with automatic failover in my ElastiCache for Redis self-designed cluster?

Resolution

Turn on Multi-AZ when you create a cluster. Or, you can modify a cluster with an existing replication group. For more information, see Minimizing down time in ElastiCache for Redis with Multi-AZ.

Note: A Redis cluster with Multi-AZ turned off reduces the cluster's fault tolerance. If you experience an Availability Zone failure or loss of network connectivity, then the node becomes unavailable. If automatic failover is turned off, then you can manually failover from an Availability Zone to another Availability Zone. For more information, see Testing automatic failover.

Note: You're covered by the Amazon ElastiCache Service Level Agreement that's provided to clusters with the Multi-AZ turned on.

Related information

Multi-AZ support/auto failover for Amazon ElastiCache for Redis