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Scale a Redis cluster
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Scale a Redis cluster

A Redis cloud database cluster can be scaled — for example, increase RAM to improve cluster performance.

You can change a fixed node configuration to another fixed configuration, but only with more RAM and disk space. You can reduce or increase the number of vCPUs. Look at the list of Redis node configurations.

The process of changing the configuration depends on the availability of replicas:

  • if there are no replicas in the cluster — the master node will be stopped while the changes are applied and the cluster will be temporarily unavailable for reading and writing;
  • if there are replicas in the cluster — the cluster will be read and write accessible while the changes are applied. The replicas will be stopped one by one, and the configuration of each replica will be changed. The master note will then switch to one of the replicas, and the past master note configuration will change.

The configuration change time depends on the amount of data in the cluster.

  1. In Control Panel, go to Cloud Platform → Databases.
  2. Open the cluster page → Settings tab.
  3. Click Scale Cluster.
  4. Select another fixed configuration. You can only select a configuration with more RAM and disk space. The number of vCPUs can be reduced or increased.
  5. Optional: increase the number of replicas in the cluster.
  6. Click Save.