ARRANGEMENT CHANGE METHOD OF VIRTUAL MACHINE, ARRANGEMENT CHANGE DEVICE OF VIRTUAL MACHINE, AND ARRANGEMENT CHANGE PROGRAM OF VIRTUAL MACHINE

摘要

PROBLEM TO BE SOLVED: To reduce the number of physical machines used for securing a prescribed number of physical machines whose residual capacity is equal to or more than prescribed capacity.SOLUTION: In change, in the case that the number of physical machines whose residual capacity is equal to or more than the prescribed capacity among M pieces of physical machines in each of which at least one virtual machine is arranged is smaller than a prescribed number by N, the virtual machines arranged in the M pieces of physical machines are arranged in M+N-1 pieces or fewer of physical machines, and the number of physical machines whose residual capacity is equal to or more than the prescribed capacity among the M+N-1 pieces or fewer of physical machines after the change reaches the prescribed number. In the case that the change is possible, the change is executed.