"A system has plural physical machines that contain virtual machines. A load balancer receives a request from a client. In response to the request, it is determ

"A system has plural physical machines that contain virtual machines. A load balancer receives a request from a client. In response to the request, it is determined whether at least one additional virtual machine should be started up. In response to determining that at least one additional virtual machine should be started up, the load balancer sends at least one command to start up the at least one additional virtual machine in at least one of the physical machines."