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:
Apr. 06, 2010
Filed:
Feb. 15, 2007
Norifumi Nishikawa, Machida, JP;
Kazuhiko Mogi, Yokohama, JP;
Hideomi Idei, Yokohama, JP;
Yoshiaki Eguchi, Machida, JP;
Norifumi Nishikawa, Machida, JP;
Kazuhiko Mogi, Yokohama, JP;
Hideomi Idei, Yokohama, JP;
Yoshiaki Eguchi, Machida, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A database system includes a center server and local servers. The center server includes a replication requesting unit, a data consolidating unit including a center DB freeze requesting unit and a center DB freeze release requesting unit, a replication source managing table and a data consolidation completion notifying unit. Each of the local servers includes a local DB freeze requesting unit, a remote volume split requesting unit, a remote volume split completion notifying unit and a local DB freeze release requesting unit. The center server permits replications of local DB's in local storage subsystems to be created in the center storage subsystem and accesses shadow images of the replications to give a consolidated access to the plurality of local DB's.