The backup process is not a file system backup; it is a logical backup.
这种备份不是文件系统的备份，而是逻辑上的备份。
The procedure performs a logical backup of all objects in the schema to the file system. Supported objects are.
这个过程将模式中的所有对象逻辑备份到文件系统中。
Logical backup management - Timestamp for each backup is created so that the image to be restored can be manipulated.
逻辑备份管理——为各备份创建时间戳，这样即可操纵要还原的映像。
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