发明授权
- 专利标题： Performance enhancement technique for raids under rebuild
- 专利标题（中）： 改善突击行动的表现增强技术
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申请号： US13237397申请日： 2011-09-20
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公开(公告)号： US08719619B2公开(公告)日： 2014-05-06
- 发明人: Chao Guang Li , Yao Peng , Cheng-Chung Song , Zhi Qiang Wang , Hui Zhang
- 申请人： Chao Guang Li , Yao Peng , Cheng-Chung Song , Zhi Qiang Wang , Hui Zhang
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Nelson and Nelson
- 代理商 Daniel P. Nelson; Alexis V. Nelson
- 主分类号： G06F11/00
- IPC分类号： G06F11/00
摘要：
A method for improving the performance of a RAID under rebuild is disclosed. In one embodiment, such a method includes identifying a RAID requiring rebuild, such as by identifying a RAID having one or more failed storage-drive components. The method then automatically performs the following in response to identifying the RAID: the method identifies hot extents (i.e., extents most heavily accessed) in the RAID; the method migrates the hot extents from the identified failed RAID to a normal RAID not requiring rebuild, such as to an underused RAID; and the method rebuilds the failed RAID. The migration of the hot extents will ideally occur while the RAID is being rebuilt but may also be performed prior to the rebuild process. A corresponding apparatus and computer program product are also disclosed.
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