Release 10.1B: OpenEdge Replication
User Guide
Transition processing
The OpenEdge Replication agent transitions a target database to a normal database that can be used as a hot standby in the event of a failure of the source database; therefore, the database type specified in the property file can be source or normal. The target database can be accessed for all database activity.
The actual process the OpenEdge Replication agent performs is as follows:
- All database connections are disallowed.
- All user processes connected to the target database are shut down to prevent locks on critical resources required by the database manager.
- All active transactions are undone or rolled back.
- OpenEdge Replication is disabled for the target database. Specifically, OpenEdge Replication can no longer be performed for this database.
- Database connections are allowed.
- The now-normal database is shut down.
Once these steps are complete, the now-normal database can be restarted using production arguments. When the source machine again becomes available, all activity performed on the database that was once the target database must be backed up and then restored to the source machine.
Copyright © 2006 Progress Software Corporation www.progress.com Voice: (781) 280-4000 Fax: (781) 280-4095 |