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:

> 1. All database connections are disallowed.

> 2. All user processes connected to the target database are shut down to prevent locks on critical resources required by the database manager.

> 3. All active transactions are undone or rolled back.

> 4. Fathom Replication is disabled for the target database. Specifically, Fathom Replication can no longer be performed for this database.

> 5. Database connections are allowed.

> 6. 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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