Progress Fathom Replication
User’s Guide
Transition processing
The Fathom 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. The target database can be accessed for all database activity. The actual process the Fathom 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.
- Fathom Replication is disabled for the target database. Specifically, Fathom 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.
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