The archive database is available in two types: Archive Database Standalone Edition and Archive Database Cluster Edition (now known as X-Engine Edition). This topic describes how to upgrade an Archive Database Standalone Edition to an Archive Database Cluster Edition.
Background information
You can no longer purchase new Archive Database Standalone Edition clusters. However, you can continue to use your existing standalone clusters. You can upgrade an existing Archive Database Standalone Edition cluster to an Archive Database Cluster Edition with the Dedicated specification. For more information about the cluster edition, see X-Engine Edition.
Precautions
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When you upgrade an Archive Database Standalone Edition to an Archive Database Cluster Edition, the system automatically restarts the node. The restart typically takes 3 to 5 minutes, but the exact duration depends on the volume of redo logs accumulated before the upgrade. In extreme cases, the restart can take up to 30 minutes. During this process, your services are unavailable. Perform this operation with caution and during off-peak hours.
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After the upgrade is complete, all nodes in the cluster continue to use the primary endpoint. If you need to use a cluster endpoint, you must configure one.
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After you upgrade to an Archive Database Cluster Edition, you cannot revert to the Archive Database Standalone Edition. You can add more nodes if needed. Adding nodes at this stage does not cause a node restart. The procedure and precautions for adding or removing nodes are the same as those for the cluster edition. For more information, see Add or remove nodes.
Procedure
- Log on to the PolarDB console.
In the upper-left corner, select the region where the cluster is deployed.
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Use one of the following methods to open the Change Configurations dialog box:
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Method 1:
On the Clusters page, find the target cluster, and in the Actions column, click Upgrade to Archive Database Cluster Edition.
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Method 2:
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On the Clusters page, click the ID of your cluster.
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On the Basic Information page, in the Database Nodes section, click Upgrade to Archive Database Cluster Edition.
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Click + Add a read-only node, select a Switching Time, accept the terms of service, and then click Go to pay.
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To add multiple read-only nodes to your PolarDB for MySQL cluster, click + Add a read-only node multiple times.
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You can set the Switching Time to Switch Now or Switch At. If you select Switch At, you can choose any time within the next 24 hours. The node addition task completes within 30 minutes of the selected time. You can view task details or cancel the task on the Scheduled Tasks page. For more information, see View scheduled tasks.
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On the Pay page, confirm the order details and click Pay.