Log on to the Simple Application Server console, and choose Server O&M > Disk > Create a Snapshot.
Enter the snapshot name and click OK.
Wait for the creation of the snapshot to complete.
Note: Total snapshot quantity upper limit for has create instance number multiplied by 3, but most don’t more than 15. Such as server was release the server corresponding of snapshot also will together be release.
choose Server O&M > Snapshot ，Selected a snapshot that you have created, and click Rollback next to it.
Confirm and start rollback.
Note: Rollback snapshot will lose all current data. Please back up all data on the current server in advance.