| 摘要 |
PROBLEM TO BE SOLVED: To efficiently backup in a backup unit, such as an updated file or block, without performing differential backup for data not required to be backuped. SOLUTION: A differential backup apparatus has an update object list creation means 310 for searching updated objects other than ones in directories that are not differential backup targets, a backup target object list creation means 320 for excluding non-target objects of differential backup from the updated objects and selecting differential backup target objects, and a differential backup archive file creation means 330 for performing backup of the differential backup target objects. COPYRIGHT: (C)2008,JPO&INPIT
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