A barrier movement operator moves a barrier between open and closed positions. Air is aspirated, by a ventilator and via the pipe system, from rooms and devices that are to be monitored, and monitoring takes place for any characteristics of burning. The scheduler then determines an advantageous host server among the primary host server and the secondary host server and, based at least in part on the determination, initiates the powering down of either the VM on the primary host server or the duplicate VM on the secondary host server. A portion of the circuit is selected for replication.