Changing the number of replicas

You can dynamically increase or decrease the number of read replicas in your Redis OSS replication group using the AWS Management Console, the AWS CLI, or the ElastiCache API. If your replication group is a Redis OSS (cluster mode enabled) replication group, you can choose which shards (node groups) to increase or decrease the number of replicas.

To dynamically change the number of replicas in your Redis OSS replication group, choose the operation from the following table that fits your situation.

To Do This	For Redis OSS (cluster mode enabled)	For Redis OSS (cluster mode disabled)
Add replicas	Increasing the number of replicas in a shard	Increasing the number of replicas in a shard Adding a read replica for Redis OSS (Cluster Mode Disabled)
Delete replicas	Decreasing the number of replicas in a shard	Decreasing the number of replicas in a shard Deleting a read replica for Redis OSS (Cluster Mode Disabled)