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. 04, 2011
Filed:
Aug. 06, 2008
Tsunehiko Baba, Hachioji, JP;
Tomohiro Hanai, Yokohama, JP;
Shinji Hamada, Yokohama, JP;
Kenji Kushi, Yokohama, JP;
Norihiro Hara, Kawasaki, JP;
Tsunehiko Baba, Hachioji, JP;
Tomohiro Hanai, Yokohama, JP;
Shinji Hamada, Yokohama, JP;
Kenji Kushi, Yokohama, JP;
Norihiro Hara, Kawasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a data replication method capable of reducing the number of communication times when a processing result of an active system is replicated to a standby system. The data replication method, in which a first computer receives a first message containing a first processing request, and a plurality of second computers replicates the first message, includes the steps of: sending, by a third computer, the first message to the first computer and the second computers; sending, by each of the second computers, a message receive notification of the first message to the first computer; sending, by the first computer, after reception of the message receive notification from the second computers, the message receive notification of the first message to the third computer; and sending, by the first computer, a notification indicating that the first processing request becomes executable by the first computer to the second computers.