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. 10, 2017
Filed:
Mar. 24, 2014
Hitachi, Ltd., Tokyo, JP;
Akihiro Itoh, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Data synchronization requires much time if synchronization is started from an initial state where synchronization between databases is not performed, and when a synchronized record is updated during the synchronization process, synchronization of records must be performed again, so that the amount of communication for synchronization is increased. Therefore, when starting synchronization, data synchronization is performed based on a method using a table indicating the synchronization statuses between databases, and at the final stage of synchronization, data synchronization is performed based on a query transmission method using update logs. The remaining synchronization time is periodically calculated of a case where synchronization is continued via the table method and a case where synchronization is performed by switching to the query transmission method, and the synchronization method is switched if the calculated remaining synchronization time becomes shorter when switched to the query transmission method.