Patent ID: 8838762

Claim:
A non-transitory recording medium storing a management program causing a management server that has a database to execute a processing, the processing comprising: acquiring, from a plurality of virtual machine hosts, state information of a plurality of virtual machine guests managed by the virtual machine hosts, the state information including a power supply state of each virtual machine guest and an indication as to which of the virtual machine hosts each virtual machine guest is currently installed on; updating link relation information indicating link relation between the virtual machine guests and the virtual machine hosts stored in the database, based on both of the acquired power-supply state and the installation indication of the virtual machine guests; repeatedly executing the acquiring; when it is determined from the link relation information that a specific virtual machine guest is not still installed on a previously indicated virtual machine host, waiting for a predetermined period of time and determining whether the specific virtual machine guest has been installed on another virtual machine host; when the specific virtual machine guest has been installed on another virtual machine host within the predetermined time, updating the link relation information to reflect the link relation between the specific virtual machine guest and the another virtual machine host; and when the specific virtual machine guest has not been installed on another virtual machine host within the predetermined time, deleting the link relation information of the specific virtual machine quest.