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. 04, 2013
Filed:
Dec. 03, 2010
Masahisa Tamura, Kawasaki, JP;
Yasuo Noguchi, Kawasaki, JP;
Kazutaka Ogihara, Kawasaki, JP;
Tetsutaro Maruyama, Kawasaki, JP;
Yoshihiro Tsuchiya, Kawasaki, JP;
Takashi Watanabe, Kawasaki, JP;
Tatsuo Kumano, Kawasaki, JP;
Kazuichi Oe, Kawasaki, JP;
Masahisa Tamura, Kawasaki, JP;
Yasuo Noguchi, Kawasaki, JP;
Kazutaka Ogihara, Kawasaki, JP;
Tetsutaro Maruyama, Kawasaki, JP;
Yoshihiro Tsuchiya, Kawasaki, JP;
Takashi Watanabe, Kawasaki, JP;
Tatsuo Kumano, Kawasaki, JP;
Kazuichi Oe, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A computer in a disk node executes a data management program. A deduplication-eligible data unit detection module detects a data unit whose deduplication grace period after last write time has expired. A deduplication address fetch module interacts with an index server to obtain a deduplication address associated with a unique value of data stored in a constituent storage space allocated to the data unit that is found to be deduplication-eligible. A constituent storage space deallocation module stores the obtained deduplication address in a data unit record memory, together with information indicating the detected data unit. Simultaneously a constituent storage space deallocation module releases the allocated constituent storage space from the detected data unit.