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:
Aug. 29, 2017
Filed:
Jun. 15, 2015
Applicant:
International Business Machines Corporation, Armonk, NY (US);
Inventors:
Min Fang, Shanghai, CN;
Hui X. Gu, Shanghai, CN;
Xiao Yan Li, Shanghai, CN;
Fan Gang Zeng, Shanghai, CN;
Assignee:
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 17/30 (2006.01); G06F 12/10 (2016.01); G06F 3/06 (2006.01);
U.S. Cl.
CPC ...
G06F 17/30327 (2013.01); G06F 3/067 (2013.01); G06F 3/0608 (2013.01); G06F 3/0611 (2013.01); G06F 3/0643 (2013.01); G06F 3/0665 (2013.01); G06F 12/10 (2013.01); G06F 17/30961 (2013.01); G06F 2212/1024 (2013.01); G06F 2212/152 (2013.01); G06F 2212/202 (2013.01); G06F 2212/65 (2013.01);
Abstract
The invention relates to retrieving data from a storage system. One embodiment of the invention comprises receiving a write operation, establishing a correspondence relationship between a logic block address and a physical block address of the write operation, and determining whether a valid data percentage in a mapping table is greater than a predetermined threshold after the correspondence relationship is added in stored metadata of stored metadata.