Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2007-10-30
2007-10-30
Alam, Shahid A (Department: 2162)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C709S201000, C715S252000
Reexamination Certificate
active
10679015
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 a second database. This allows for transparent synchronization of the databases and quick recovery from a database failure, while imposing little performance or network overhead.
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Emmons Ian David
Singhal Vivek P.
Alam Shahid A
Fenwick & West LLP
Progress Software Corporation
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