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:
Jan. 03, 2006
Filed:
Jun. 26, 2002
Kota Yamaguchi, Yamato, JP;
Shigetoshi Hayashi, Fujisawa, JP;
Junko Katsumata, Yokohama, JP;
Taichi Ishikawa, Yokohama, JP;
Hiroshi Yamakawa, Yokohama, JP;
Kota Yamaguchi, Yamato, JP;
Shigetoshi Hayashi, Fujisawa, JP;
Junko Katsumata, Yokohama, JP;
Taichi Ishikawa, Yokohama, JP;
Hiroshi Yamakawa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
When a database area multi-written or replicated in an external storage unit is separated, a database management system writes consistent data into the external storage unit. A method and system capable of controlling a timing of separating the replicated database area is provided. Furthermore, new data directory information necessary to access the replicated database is dynamically added based on the data directory information of the replication source database. A method and system capable of selecting whether to access the database which is the source of the replication or access the replicated database are provided. Thus, when the database area multi-written or replicated in an external storage unit is separated and physical replicated databases are created, it is possible to maintain consistency of the replicated databases while continuing transaction processing.