Invention Grant
US08402215B2 Storage system, storage apparatus, and optimization method of storage areas of storage system having page migration
有权
存储系统，存储设备以及具有页面迁移的存储系统存储区域的优化方法
- Patent Title: Storage system, storage apparatus, and optimization method of storage areas of storage system having page migration
- Patent Title (中): 存储系统，存储设备以及具有页面迁移的存储系统存储区域的优化方法
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Application No.: US12664967Application Date: 2009-10-15
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Publication No.: US08402215B2Publication Date: 2013-03-19
- Inventor: Yoichi Mizuno , Yoshinori Ohira
- Applicant: Yoichi Mizuno , Yoshinori Ohira
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, PC
- International Application: PCT/JP2009/005383 WO 20091015
- International Announcement: WO2011/045838 WO 20110421
- Main IPC: G06F12/00
- IPC: G06F12/00
Abstract:
This invention is intended for the purpose of providing the storage system, the storage apparatus, and the storage system by which, even if the storage areas allocated to the virtual volume are managed in management units set by the RAID group, overhead for parity calculation does not become excessive. This invention, by releasing a specific management unit not fully utilized for page allocation from allocation to the virtual volume and migrating the allocated pages belonging to this specific management unit to the other management unit, makes the storage areas of the specific management unit available for the write accesses for the other virtual volumes from the host computer.
Public/Granted literature
- US20110191536A1 STORAGE SYSTEM, STORAGE APPARATUS, AND OPTIMIZATION METHOD OF STORAGE AREAS OF STORAGE SYSTEM Public/Granted day:2011-08-04
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