Method of applying changes to a standby database system

Details Method of applying changes to a standby database system Method of applying changes to a standby database system

2005-12-27

2005-12-27

Mizrahi, Diane (Department: 2165)

Data processing: database and file management or data structures

Database design

Data structure types

Reexamination Certificate

active

06980988

ABSTRACT:
A method for applying changes to a standby system is described in which multiple apply tasks or “slaves” are scheduled to changes from redo logs, especially those changes in large transactions, in parallel and as soon as they are encountered in the logs. To foster data convergence, a partial ordering may be imposed on the transactions so that those transactions that actually depend on others are forced to wait on the transactions they are dependent upon commit. To foster read consistency, synchronization points may be periodically established, at which points a read consistent state of the standby database system can be obtained-all without adversely impact the throughput of the system.

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