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. 19, 2009
Filed:
Jan. 19, 2005
Masataka Kan, Yokohama, JP;
Norihiro Hara, Kawasaki, JP;
Katsushi Yako, Yokohama, JP;
Tetsuya Suzuki, Yokohama, JP;
Keisuke Matsubara, Yokohama, JP;
Tooru Kawashima, Yokohama, JP;
Masami Hikawa, Odawara, JP;
Yoshihide Sato, Yokohama, JP;
Masataka Kan, Yokohama, JP;
Norihiro Hara, Kawasaki, JP;
Katsushi Yako, Yokohama, JP;
Tetsuya Suzuki, Yokohama, JP;
Keisuke Matsubara, Yokohama, JP;
Tooru Kawashima, Yokohama, JP;
Masami Hikawa, Odawara, JP;
Yoshihide Sato, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a database management system using a shared-nothing architecture and adopting a system takeover in a DB storage area unit, correspondence information is provided which indicates a relation between a DB storage area and a DB processing server in charge of an access to the DB storage area, when a takeover occurs to some DB storage area, the correspondence information is changed in such a manner that an access process to the DB storage area is made in charge of another running DB processing server, and when some DB storage area is accessed in response to an inquiry request from a user, a DB processing server as an access request destination is determined by referring to the correspondence information.