Are Services Interrupted During Specification Modification?

You are advised to change the instance specifications during off-peak hours because specification modification has the following impacts:

• Single-node and master/standby:

  The instance cannot be connected for several second and remains read-only for about 1 minute.

  For capacity expansion, only the memory of the instance is expanded. The CPU processing capability is not improved.

  Data of single-node instances may not be retained because they do not support data persistence. After the scaling, check whether the data is complete and import data if required.

• Proxy Cluster:

  The instance can be connected, but the CPU will be occupied and the latency will increase during data migration. During capacity expansion, new Redis Server nodes are added, and data is automatically balanced to the new nodes.

  Backup records created before the capacity change cannot be restored.

• Redis Cluster:

  The instance can be connected, but the CPU usage will increase and the latency will increase during data migration. During capacity expansion, new Redis Server nodes are added, and data is automatically balanced to the new nodes.