The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2014
Filed:
Sep. 20, 2011
Chao Guang LI, Shanghai, CN;
Yao Peng, Shanghai, CN;
Cheng-chung Song, Tucson, AZ (US);
Zhi Qiang Wang, Shanghai, CN;
Hui Zhang, Shanghai, CN;
Chao Guang Li, Shanghai, CN;
Yao Peng, Shanghai, CN;
Cheng-Chung Song, Tucson, AZ (US);
Zhi Qiang Wang, Shanghai, CN;
Hui Zhang, Shanghai, CN;
International Business Machines Corporation, Armonk, NY (US);
Abstract
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.