Asynchronous tasks are tasks that complete at some point in the future. Asynchronous tasks can run in the background and do not block the execution of other tasks. While asynchronous tasks are being processed, applications can perform other operations without waiting for the tasks to complete. This way, system performance and responsiveness is improved. The task management feature records the asynchronous tasks or time-consuming tasks that run on Elastic Compute Service (ECS) instances, such as tasks for importing images, exporting images, and changing cloud disk configurations, and allows you to perform simple management on the tasks.
Task types
ECS supports the following types of asynchronous tasks:
Export Image
An Export Image task is an asynchronous task for exporting a custom image created from an ECS instance to an Object Storage Service (OSS) bucket. For more information, see Export a custom image.
Import Image
An Import Image task is an asynchronous task for importing an image from your on-premises device to Alibaba Cloud to generate a custom image. For more information, see Import custom images.
Change Disk Configuration
A Change Disk Configuration task is an asynchronous task for changing the disk category of a cloud disk based on your business requirements. For more information, see Change the category of a disk.
Redeploy ECS Instance
A Redeploy ECS Instance task is an asynchronous task for redeploying an ECS instance for which an Instance Redeployment Due to System Maintenance (SystemMaintenance.Redeploy) event or an Instance Redeployment Due to System Error (SystemFailure.Redeploy) event is generated. For more information, see Summary.
Create Renewal Order
A Create Renewal Order task is an asynchronous task for renewing more than 70 ECS instances at the same time. For more information, see Renew a subscription instance.
Procedure
Go to ECS console - Tasks.
In the top navigation bar, select a region.
View and manage asynchronous tasks.
References
You can call the following API operations to query the list and details of asynchronous tasks in ECS:
DescribeTasks: queries the list of asynchronous tasks.
DescribeTaskAttribute: queries the details of an asynchronous task.
CancelTask: cancels an asynchronous task.