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Lu, Huayi c5fcb46315 DWS UMN 801 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2022-12-13 12:47:57 +00:00

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Performing a Primary/Standby Switchback

Context

In the Unbalanced state, the number of primary instances on some nodes increases. As a result, the load pressure is high. In this case, the cluster is normal, but the overall performance is lower than that in the balanced state. During off-peak hours, you are advised to perform a switchback to restore the primary/standby relationship of your cluster.

  • Only 8.1.1.202 and later versions support primary/standby switchback.
  • You are advised to perform a switchback during off-peak hours. Switchback interrupts services for a short period of time. The actual interruption duration depends on your service volume.

Procedure

  1. Log in to the GaussDB(DWS) management console.
  2. On the Clusters page, find a cluster in Unbalanced state.
  3. In the Operation column of the cluster, choose More > Switchback.

  4. In the dialog box that is displayed, confirm that the service is in off-peak hours, and click Yes. A message will be displayed in the upper right corner, indicating that the switchback request is being processed.

  5. Check the cluster status. During the switchback, the cluster status is Switching back. After the switchback, the cluster status will change to Available.

Parent topic: Clusters