Data processing: database and file management or data structures – File or database maintenance – Database recovery
Reexamination Certificate
2006-11-24
2010-06-08
Ali, Mohammad (Department: 2158)
Data processing: database and file management or data structures
File or database maintenance
Database recovery
C714S001000, C714SE11007, C714S002000, C714S006130, C707S609000, C707S636000
Reexamination Certificate
active
07734596
ABSTRACT:
Techniques used in an automatic failover configuration having a primary database system, a standby database system, and an observer for preventing divergence among the primary and standby database systems while increasing the availability of the primary database system. In the automatic failover configuration, the primary database system remains available even in the absence of both the standby and the observer as long as the standby and the observer become absent sequentially. The failover configuration further permits automatic failover only when the observer is present and the standby and the primary are synchronized and inhibits state changes during failover. The database systems and the observer have copies of failover configuration state and the techniques include techniques for propagating the most recent version of the state among the databases and the observer and techniques for using carefully-ordered writes to ensure that state changes are propagated in a fashion which prevents divergence.
REFERENCES:
patent: 7058853 (2006-06-01), Kavanappillil et al.
patent: 7159234 (2007-01-01), Murphy et al.
patent: 7363313 (2008-04-01), Prager et al.
patent: 2005/0066218 (2005-03-01), Stachura et al.
patent: 2005/0102603 (2005-05-01), Tapper et al.
patent: 2006/0053183 (2006-03-01), Eaton et al.
patent: 2006/0069946 (2006-03-01), Krajewski et al.
patent: 2006/0117212 (2006-06-01), Meyer et al.
patent: 2006/0149797 (2006-07-01), Chai et al.
“Database Mirroring” http://msdn2.microsoft.com/ms177412.aspx.
Ron Talmage, “Database Mirroring in SQL Server 2005”, published Apr. 1, 2005, http://www.microsoft.com/technet/prodtechnol/sql/2005/dlbmirror.mspx.
Garin, Jr. Benedicto Elmo
Guzman Raymond
Vivian Stephen John
Voss Douglas Andrew
Ali Mohammad
Bui Thuy (Tiffany)
Nelson Gordon E.
LandOfFree
Automatic failover configuration with redundant abservers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic failover configuration with redundant abservers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic failover configuration with redundant abservers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4220012