【多选题】
A There is no need for InnoDB tables to perform its own recovery when restoring from the snapshot backup.
B Snapshot backups can be used only in virtual machines.
C Snapshot -based backups greatly reduce time during which the database and applications are unavailable.
D The frozen file system can be cloned to another virtual machine immediately into active service.
E A separate physical copy must be made before releasing the snapshot backup
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