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Scale up the Kafka cluster
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Scale up the Kafka cluster

The Kafka cloud database cluster can be scale. For example:

  • increase vCPU and RAM to improve cluster performance;
  • change a configuration line with a local disk to another line with a local disk — the disk size must be larger than in the previous configuration, the number of vCPUs and RAM can be reduced or increased. It is not possible to change a configuration line with one disk type to a line with another disk type.

Check out the list node configurations.

While the changes are being applied, the master node will be stopped and the cluster will be temporarily unavailable for reads and writes.

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

Scale the cluster⁠

Scale the cluster when users are least active.

  1. В control panels go to Cloud platform → Databases.

  2. Open the cluster page → tab Settings.

  3. Click Scale the cluster.

  4. Pick another configuration. You can:

    • Select the configuration with the larger disk space only;
    • reduce or increase the number of vCPUs and RAM;
    • change a configuration ruler with a local disk to another ruler with a local disk. You cannot change a configuration ruler with one disk type to a ruler with a different disk type.

  5. Click Save.

  6. After scaling clear the DNS cache.

  7. Verify that the cluster has scaled correctly.

Clear DNS cache⁠

  1. Open the CLI.

  2. Clear the DNS cache:

    sudo systemctl restart systemd-resolved