| 摘要 |
PROBLEM TO BE SOLVED: To perform logical overwriting of a file while holding an original file, and logical and atomic update of a plurality of files. SOLUTION: This file management device setting only a file in a latest directory tree among a plurality of directory trees as an update target has: a virtual directory construction means 11 overlapping the plurality of directory trees, and constructing a virtual directory 12 allowing access to the directory trees as a single directory; an application process 13 designating a path of the file in the virtual directory, and performing various kinds of handling requirement of the file to a virtual directory IO subsystem; and the virtual directory IO subsystem 14 acquiring an actual path of the file by searching the plurality of directory trees on the basis of the requirement from the application process, and executing processing corresponding to requirement contents. COPYRIGHT: (C)2007,JPO&INPIT
|
