Before you perform major operations, such as rolling back a cloud disk, modifying critical system files, or changing the operating system, create a snapshot of your cloud disk (system disk or data disk) to back up your data. If an operation causes issues or data loss, you can use the snapshot to restore your data and maintain business continuity. This topic describes how to manually create a snapshot for a single cloud disk.
Prerequisites
The cloud disk must be in the In Use or Available state. The required state of the associated RDS Custom instance varies based on the cloud disk state:
If the cloud disk is In Use, the instance must be in the Running or Stopped state.
If the cloud disk is Available, it must have been previously attached to an RDS Custom instance.
Usage notes
When you create a snapshot, note the following:
Do not change the state of the RDS Custom instance, for example, by stopping or restarting it. Otherwise, the snapshot creation will fail.
Create snapshots during off-peak hours. When a snapshot is being created, the I/O performance of the cloud disk can decrease by up to 10%, causing a brief, transient slowdown in read and write operations.
The snapshot does not include incremental data generated on the cloud disk during the creation process.
You cannot resize a cloud disk while a snapshot is being created.
After a snapshot is created, charges are based on its storage capacity and are settled separately for each region.
Procedure
This section describes how to create a snapshot on the Custom Storage and Snapshots page.
You can also create a snapshot from the Storage Information page of an instance. To do this, go to the Custom Instance List, click the ID of the target instance, and then click Storage Information in the left-side navigation pane. In the Actions column for the target cloud disk, click Create Snapshot.
Log on to the ApsaraDB RDS console. In the left-side navigation pane, click Custom Storage and Snapshots.
On the Custom Cloud Disks tab, find the target cloud disk and click Create Snapshot in the Actions column.
In the Create Snapshot dialog box, enter a Snapshot Name and click OK.
Related APIs
Alternatively, you can call the CreateRCSnapshot API operation to create a snapshot for a cloud disk.