Virtual computer system and its optimization method

Abstract

Optimization of resource allocation in a virtual computer system is efficiently performed according to a method consistent with a virtualization design concept. The virtual computer system includes a plurality of virtual devices that share the physical resources of a computer and execute an application, a virtualization section that manages the plurality of virtual devices, and a management section that controls the virtualization section. The plurality of virtual devices set allocation of physical resources to the applications by a first optimization calculation using resource supply information from the management section and transmit resource request information corresponding to the resource allocation setting to the management section. The management section sets allocation of the physical resources to the virtual devices by a second optimization calculation using the resource request information from the plurality of virtual devices and transmits resource supply information corresponding to the resource allocation setting to the plurality of virtual devices. While the resource supply information and the resource request information are exchanged between the plurality of virtual devices and the management section, the first and second optimization calculations are performed, thereby dynamically allocating the physical resources.