| 摘要 |
A first calculator calculates, for each combination of the physical machines, a network distance representing magnitude of load during communication between one of a plurality of physical machines and another physical machine. An acquisition unit acquires communication permission information representing that a newly operated virtual machine is permitted to communicate with which virtual machine among a plurality of virtual machine already operated in any one of the plurality of physical machines. A second calculator calculates, for each of the plurality of physical machines, a network cost representing magnitude of load of the network system during communication between the communication-permitted virtual machine and a new virtual machine, when one of the plurality of physical machines operates the new virtual machine on the basis of the network distance and the communication permission information. A determination unit determines which physical machine is to operate the new virtual machine, using the calculated network cost. |
