Abstract: A computer system comprises a storage unit which stores communication information that passes through a path control virtual machine as a virtual machine which performs path control of communication between a plurality of virtual machines and a physical machine, virtual machine information shows a status of use of the plurality of virtual machines, placement information shows a physical host configured from the plurality of virtual machines, physical resource information shows a status of use of physical resources in the physical host, and path information shows a path of communication between the plurality of virtual machines and the physical machine, and a placement processing unit selects a physical host to place the path control virtual machine based on the virtual machine information, the placement information and the physical resource information, and calculates a communication cost on an assumption that the path control virtual machine is placed in the selected physical host.

Abstract: A computer system comprises a storage unit which stores communication information that passes through a path control virtual machine as a virtual machine which performs path control of communication between a plurality of virtual machines and a physical machine, virtual machine information shows a status of use of the plurality of virtual machines, placement information shows a physical host configured from the plurality of virtual machines, physical resource information shows a status of use of physical resources in the physical host, and path information shows a path of communication between the plurality of virtual machines and the physical machine, and a placement processing unit selects a physical host to place the path control virtual machine based on the virtual machine information, the placement information and the physical resource information, and calculates a communication cost on an assumption that the path control virtual machine is placed in the selected physical host.