Patent ID: 8286165
Filing Date: 2012-10-09
Classification: G06F,Y02D

Abstract:
1. A server management apparatus for managing a physical server group including physical servers rendering operative thereon a virtual server group having a plurality of virtual servers and for managing, when putting into practice a cluster system containing therein said plurality of virtual servers placed in said physical server group, a placement state of said virtual servers depending on a load state of said virtual server group, wherein said server management apparatus comprises: one or more computers configured with the following components: a load information collection unit which collects load information of the virtual server group constituting said cluster system; a configuration information collection unit which collects configuration information indicating that said virtual server group is presently assigned to which one of said physical servers; a configuration change judgment unit which determines from the collected load information whether the virtual servers constituting said cluster system are reducible in number; a configuration change target selection unit which selects from the collected configuration information a physical server which is least in operative virtual server number; and a configuration change execution unit which deactivates a virtual server operating on the selected physical server; a physical server power supply control unit which determines whether a virtual server is absent with respect to said physical server as a result of configuration change performed by said configuration change execution unit and for executing, when it is judged that such virtual server is absent, power-off of the physical server; wherein said server management apparatus is configured so that after said configuration change execution unit has executed the scale-in, said configuration change judgment unit judges whether it is possible to power off the physical server by operative virtual server migration, said configuration change target selection unit migrates one or more than one virtual server between physical servers when it is judged that it is possible to power off the physical server, said configuration change execution unit judges whether there is a virtual server operating on a physical server of migration source, and said physical server power supply control unit performs power-off of the physical server if the virtual server presence judgment indicates that no operative virtual servers exist therein.