When performing operations and maintenance (O&M) tasks on PolarDB clusters, you can schedule them to run at a future time—for example, cluster upgrades, node additions, version upgrades, or primary zone changes. This topic describes how to view and cancel scheduled tasks in the PolarDB console.
Limitations
| Constraint | Details |
|---|---|
| Viewable task types | You can view task details only for: , , , and . |
| Cancellable status | Only tasks with a Pending status can be canceled. |
| Non-cancellable task types | Scheduled tasks for downgrade operations—including node deletion and automatic or manual downgrade—cannot be canceled. |
View scheduled tasks
Log on to the PolarDB console.
In the upper-left corner, select the region where your cluster is deployed.
In the left-side navigation pane, click Scheduled Tasks.
On the Scheduled Tasks page, review all scheduled tasks in the region. The page displays the following columns: Task ID, Status, Task Action, Start Time, End Time, and Execution Time.
The Task Action column shows the API operation name for each task. The following operations are supported:
| Task Action | Operation |
|---|---|
ModifyDBClusterPrimaryZone | Change the primary zone |
ModifyDBNodeClass | Upgrade a cluster |
CreateDBNodes | Add nodes |
UpgradeDBClusterVersion | Upgrade the cluster version |
The Order ID column is visible only when Task Action is ModifyDBNodeClass or CreateDBNodes.
Cancel a scheduled task
Only tasks with a Pending status can be canceled. To cancel a scheduled task:
Log on to the PolarDB console.
In the upper-left corner, select the region where your cluster is deployed.
In the left-side navigation pane, click Scheduled Tasks.
On the Scheduled Tasks page, find the task to cancel and click Cancel in the Actions column.
In the dialog box, click OK.
API reference
| Operation | Description |
|---|---|
| DescribeScheduleTasks | Queries details of all scheduled tasks or a specified scheduled task that belongs to the current account. |
| CancelScheduleTasks | Cancels a specified scheduled task. |