Storage apparatus and its file control method and storage...

Details Storage apparatus and its file control method and storage... Storage apparatus and its file control method and storage...

2009-06-22

2011-10-25

Rones, Charles (Department: 2164)

Data processing: database and file management or data structures

Database design

Database and data structure management

C707S821000, C709S201000, C715S255000

Reexamination Certificate

active

08046391

ABSTRACT:
Decrease in the write speed is prevented even when overwriting the entire file. When a NAS apparatus receives a file size change request from a computer as an access request source for changing the size of a file, the NAS apparatus creates a new file related to the file in a file system with a processing performance that is higher than a file system containing the file as an entity of that file, associates the new file and the foregoing file, deletes the file on the condition that the new file and the file has been associated, and executes data write processing of writing data into the new file on the condition of subsequently receiving a data write request from the access request source for writing data into the file.

REFERENCES:
patent: 2006/0069862 (2006-03-01), Kano
patent: 2007/0283090 (2007-12-01), Kaji et al.
patent: 2008/0263277 (2008-10-01), Matsunami et al.
patent: 2004-295457 (2004-10-01), None

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