| 摘要 |
A database controlling system is provided to decrease a quantity of work of a system manager and save the capacity of a hard disc of a server by deleting, after backed up data is restored, an unnecessary external file added after commencement of the backup. The database controlling system includes an external file for storing data, such as long and massive data, not ordinarily operated, an external file controlling device for controlling the external file, and an external file list storage file for storing a list of the external files. Together with a file of a base page region storing the oldest version of a page, the external file and external file list storage file directly access and backup a file. |
