PolarDB：Upgrade an Archive Database Standalone Edition cluster to an Archive Database Cluster Edition cluster

Precautions

• If an Archive Database Standalone Edition cluster is upgraded to an Archive Database Cluster Edition cluster, the nodes in the cluster automatically restart. In most cases, the restart takes three to five minutes based on the redo logs that accumulate before the upgrade. In extreme cases, the restart may take up to 30 minutes. During this period, your business is unavailable. Exercise caution when you perform this upgrade. We recommend that you perform this upgrade during off-peak hours.
• After the upgrade is successful, all nodes in the cluster continue to use the primary endpoint. To use a cluster endpoint, you must configure the cluster endpoint on your own.
• After an Archive Database Standalone Edition cluster is upgraded to an Archive Database Cluster Edition cluster, it cannot be rolled back to an Archive Database Standalone Edition cluster. If required, we recommend that you add nodes. After you add nodes, existing nodes are not restarted. The operations of adding and removing nodes and precautions are consistent with those of Cluster Edition. For more information, see Add or remove read-only nodes.

Procedure

1. Log on to the PolarDB console.
2. In the upper-left corner of the console, select the region in which the cluster that you want to manage is deployed.
3. Open the Change Configurations dialog box by using one of the following methods:
   • Method 1:
     On the Clusters page, find the cluster that you want to manage and click Upgrade to Archive Database Cluster Edition in the Actions column.
   • Method 2:
     1. On the Clusters page, click the ID of the cluster.
     2. In the Database Nodes section of the Basic Information page, click Upgrade to Archive Database Cluster Edition.
4. Click + Add a read-only node, specify Switching Time, read and accept the terms of service, and then click Buy Now.
   Note

   • If you want to add multiple nodes to your PolarDB for MySQL cluster at a time, click + Add a read-only node again to add more nodes.
   • You can set Switching Time to Switch Now or Switch At. If you select Switch At, you can specify a point in time within the following 24 hours. The nodes will be added within 30 minutes after the specified point in time. You can view the details about the scheduled task on the Scheduled Tasks page, or cancel the task. For more information, see View or cancel a scheduled task.
5. On the Purchase page, confirm the order information and click Purchase.