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. 14, 2013
Filed:
May. 27, 2010
Tatsuo Kumano, Kawasaki, JP;
Yasuo Noguchi, Kawasaki, JP;
Kazutaka Ogihara, Kawasaki, JP;
Masahisa Tamura, Kawasaki, JP;
Yoshihiro Tsuchiya, Kawasaki, JP;
Tetsutaro Maruyama, Kawasaki, JP;
Takashi Watanabe, Kawasaki, JP;
Kazuichi Oe, Kawasaki, JP;
Tatsuo Kumano, Kawasaki, JP;
Yasuo Noguchi, Kawasaki, JP;
Kazutaka Ogihara, Kawasaki, JP;
Masahisa Tamura, Kawasaki, JP;
Yoshihiro Tsuchiya, Kawasaki, JP;
Tetsutaro Maruyama, Kawasaki, JP;
Takashi Watanabe, Kawasaki, JP;
Kazuichi Oe, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A management device obtains, from the plurality of storage nodes, information of accesses which are made to the actual storage areas included in the storage nodes, generating load information of the actual storage areas based on the access information, and storing the generated load information in a load information storage unit. The device changes, based on the load information stored in the load information storage unit, the assignment relations of the actual storage areas with respect to the virtual storage areas such that loads of the storage nodes are leveled. The device instructs the plurality of storage nodes to move the data in the actual storage areas depending on change in the assignment of the actual storage areas to the virtual storage areas.