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:
Jun. 11, 2013
Filed:
Dec. 08, 2010
Applicants:
Hajime Mori, Yokohama, JP;
Norihiko Kawakami, Sagamihara, JP;
Hiroshi Hirayama, Yokohama, JP;
Katsumi Ouchi, Kawasaki, JP;
Inventors:
Hajime Mori, Yokohama, JP;
Norihiko Kawakami, Sagamihara, JP;
Hiroshi Hirayama, Yokohama, JP;
Katsumi Ouchi, Kawasaki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is an object of the present invention to provide a storage apparatus that can suppress access performance degradation owing to processing of data deduplication. The storage apparatus according to the present invention acquires a sum of the access frequencies to each of redundantly allocated pieces of data, and performs the deduplication on the pieces of data having the sum of access frequencies less than a prescribed threshold.