Invention Grant
- Patent Title: Recording medium storing allocation control program, allocation control apparatus, and allocation control method
- Patent Title (中): 记录介质存储分配控制程序，分配控制装置和分配控制方法
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Application No.: US12651522Application Date: 2010-01-04
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Publication No.: US08230191B2Publication Date: 2012-07-24
- Inventor: Yasuo Noguchi , Kazutaka Ogihara , Masahisa Tamura , Yoshihiro Tsuchiya , Tetsutaro Maruyama , Takashi Watanabe , Tatsuo Kumano , Kazuichi Oe
- Applicant: Yasuo Noguchi , Kazutaka Ogihara , Masahisa Tamura , Yoshihiro Tsuchiya , Tetsutaro Maruyama , Takashi Watanabe , Tatsuo Kumano , Kazuichi Oe
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Priority: JP2009-015470 20090127
- Main IPC: G06F12/02
- IPC: G06F12/02 ; G06F17/30
Abstract:
An allocation control apparatus allocates duplicate logical volume divided areas to virtual storage areas that do not have data storage area in the physical storage area. The apparatus associates identification information of the allocated virtual storage areas, of the duplicate logical volume divided areas, and of duplication source logical volume divided areas to be set in the management information. The apparatus detects, upon a data writing request, based on the management information, the unallocated real storage area in the logical volume divided area. The apparatus reallocates the real storage area to the duplicate logical volume divided area to update the management information. The apparatus identifies, based on the management information, the real storage area allocated to the duplication source logical volume divided area corresponding to the duplicate logical volume divided area. The apparatus copies data stored in the real storage area to the real storage area.
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