Tair (Redis OSS-compatible) cloud-native instances allow you to customize the number of replica nodes.
The standard architecture supports 1 to 9 replica nodes, while each shard in the cluster architecture supports 1 to 4 replica nodes. Additionally, all read replicas in the read/write splitting architecture have disaster recovery capabilities and can function as replica nodes for data backup. You can customize the number of read replicas.
For more information, see Manage nodes.