Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2002-01-31
2008-03-04
Winder, Patrice (Department: 2145)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C709S214000
Reexamination Certificate
active
07340637
ABSTRACT:
A method of duplicating servers and a duplicated server system that make seamless transition of service in case of server failures possible. The duplicated server system comprises first and second servers that are connected to a network and have the same network address, communication means for making high-speed communication between both servers possible, and switchover controller that designates the first server as the primary server put in operation for other computers and the second server as the secondary server in normal condition. When the first server receives a service request addressed to the system, it passes the service request to the application for processing. The first server sends the recovery data output by the application to the second server by means of the communication means. If the processing related to the service request involves an update of the data held on the server system, the second server executes the application using the recovery data sent from the first server to keep the data held on both servers identical. Service requests and the results of the processing are stored in the stacks in both servers in duplicate.
REFERENCES:
patent: 4823256 (1989-04-01), Bishop et al.
patent: 5513314 (1996-04-01), Kandasamy et al.
patent: 5781910 (1998-07-01), Gostanian et al.
patent: 6023772 (2000-02-01), Fleming
patent: 6144941 (2000-11-01), Hotti et al.
patent: 6397307 (2002-05-01), Ohran
patent: 6421688 (2002-07-01), Song
patent: 63-236137 (1988-10-01), None
patent: 11-502658 (1999-03-01), None
patent: 2000-276365 (2000-10-01), None
patent: WO 95/00906 (1995-01-01), None
patent: WO-97/27541 (1997-07-01), None
patent: WO 98/49620 (1998-11-01), None
patent: WO 00/60463 (2000-10-01), None
Patent Abstracts of Japan, publication No. 2000-276365, publication date Oct. 6, 2000.
Patent Abstracts of Japan, publication No. 63-236137, publication date Oct. 3, 1988.
Supplementary European Search Report issued for EP Application No. 02711259; Dated Sep. 23, 2005; (2 pages).
Japanese Office Action for Japanese Application No. 2001-088920, mailed on Mar. 20, 2007, with English translation thereof (10 pages).
DUAXES Corporation
Osha & Liang LLP
Winder Patrice
LandOfFree
Server duplexing method and duplexed server system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Server duplexing method and duplexed server system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Server duplexing method and duplexed server system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3961676