Read/write splitting instances of ApsaraDB for Redis allow you to select the number of replica nodes.
- Master-replica standard instances and master-replica cluster instances of ApsaraDB for Redis are configured with one master node and one replica node as data nodes. You cannot modify the number of replica nodes.
- Read/write splitting instances allow you to select different specifications and support one read-only node, three read-only nodes, or five read-only nodes. For more information, see Read/write splitting instances.