Virtual machines management apparatus, virtual machines management method, and computer readable storage medium

A non-transitory computer readable storage medium storing a program that causes a computer to execute virtual machine management, the virtual machine management comprising:

• migrating virtual machines between plural physical servers;
• storing, for each set of first virtual machines that were migrated to a same migration destination physical server parallel in time among the virtual machines migrated by the virtual machine controller, history information including
• a residual resource amount of the migration destination physical server,
• a sum of resource consumptions of the respective first virtual machines, and
• migration performance which is determined based on a number of first virtual machines migrated per unit time or a time taken by the first virtual machines to migrate;
• and
• determining as to whether or not it is possible to start migrating a planning target virtual machine, for which a new migration plan is to be created, to a candidate migration destination physical server of the planning target virtual machine at a candidate migration start time based on a residual resource amount of the candidate migration destination physical server, a resource consumption of the planning target virtual machine, a sum of resource consumptions of migration-scheduled virtual machines that are scheduled to start migrating to the candidate migration destination physical server at the candidate migration start time, and the history information.

A virtual machine management method comprising:

• migrating virtual machines between plural physical servers;
• storing, for each set of first virtual machines that were migrated to a same migration destination physical server parallel in time among the virtual machines migrated by the virtual machine controller, history information including
• a residual resource amount of the migration destination physical server,
• a sum of resource consumptions of the respective first virtual machines, and
• migration performance which is determined based on a number of first virtual machines migrated per unit time or a time taken by the first virtual machines to migrate;
• and
• determining as to whether or not it is possible to start migrating a planning target virtual machine, for which a new migration plan is to be created, to a candidate migration destination physical server of the planning target virtual machine at a candidate migration start time based on a residual resource amount of the candidate migration destination physical server, a resource consumption of the planning target virtual machine, a sum of resource consumptions of migration-scheduled virtual machines that are scheduled to start migrating to the candidate migration destination physical server at the candidate migration start time, and the history information.