What Are the Application Scenarios of Migration Tasks and Migration Task Groups?
Migration Task
If there is less than 3 TB of data or less than 5 million objects in a source bucket, create a migration task to quickly migrate the source data. For details, see Creating a Migration Task.
Migration Task Group
If there is more than 3 TB of data or more than 5 million objects to migrate in a source bucket, you can create a migration task group to migrate the source data quickly. The system will group the source objects into multiple sub-tasks for concurrent migrations. These sub-tasks are managed in groups, including progress query, resumption, and restart. For details, see Creating a Migration Task Group.
Compared with a migration task, a migration task group provides a faster and more reliable migration, to help you easily identify failed objects and quickly migrate them again.
