High availability via data services

Details High availability via data services High availability via data services

2007-10-17

2010-11-02

Alam, Shahid A (Department: 2162)

Data processing: database and file management or data structures

File or database maintenance

Database recovery

C707S640000, C707S661000, C711S145000

Reexamination Certificate

active

07827151

ABSTRACT:
Application-level replication, the synchronization of data updates within a cluster of application servers, may be provided by having application servers themselves synchronize all updates to multiple redundant databases, precluding the need for database-level replication. This may be accomplished by first sending a set of database modifications requested by the transaction to a first database. Then a message may be placed in one or more message queues, the message indicating the objects inserted, updated, or deleted in the transaction. Then a commit command may be sent to the first database. The set of database modifications and a commit command may then be sent to second database. This allows for transparent synchronization of the database and quick recovery from a database failure, while imposing little performance or network overhead.

REFERENCES:
patent: 5884328 (1999-03-01), Mosher, Jr.
patent: 6336172 (2002-01-01), Day et al.
patent: 6393466 (2002-05-01), Hickman et al.
patent: 6463513 (2002-10-01), Bish et al.
patent: 6523036 (2003-02-01), Hickman et al.
patent: 7013305 (2006-03-01), Elko et al.

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