DBCTL capabilities

A DBCTL environment alone does not have full XRF capability. It does, however, allow you to have a standby, alternate DBCTL environment.

This alternate IMS does not track the active IMS. You can only bring it to a point where it is fully initialized and ready to take over. The alternate IMS is then called a pre-initialized DBCTL environment. If the active IMS fails, you can send a restart command to the alternate IMS.

A DB/DC environment can provide DBCTL services to a CCTL because the DBCTL services are built into IMS DB. If that DB/DC environment runs XRF, the DBCTL service provided is fully XRF capable. Either the operator or the CCTL can issue a switch command to start the takeover.