Migration system, migration method and non-transitory computer-readable medium storing control program

A migration method for a virtual machine comprising:

• transmitting memory data of a plurality of virtual machines from a transfer source physical host to a transfer destination physical host to synchronize data of the virtual machines on the transfer source physical host with data of the virtual machines on the transfer destination physical host;
• determining, for each of the virtual machines, whether the data of the virtual machine on the transfer source physical host is synchronized with the data of the virtual machine on the transfer destination physical host, based on a predetermined determination criterion for synchronization;
• issuing an instruction of switching from the virtual machines on the transfer source physical host to the virtual machines on the transfer destination physical host, if, for all the virtual machines, the data of the virtual machine on the transfer source physical host is synchronized with the data of the virtual machine on the transfer destination physical host, based on a result of the determining;
• and
• continuing transmitting the data from the transfer source physical host to the transfer destination physical host until the instruction of the switching is issued.

A non-transitory computer readable storage medium recording thereon a control program, causing a computer to perform a migration process for a plurality of virtual machines by controlling a transfer source physical host and a transfer destination physical host, the process comprising:

• transmitting memory data of the virtual machines from the transfer source physical host to the transfer destination physical host to synchronize data of the virtual machines on the transfer source physical host with data of the virtual machines on the transfer destination physical host;
• determining, for each of the virtual machines, whether the data of the virtual machine on the transfer source physical host is synchronized with the data of the virtual machine on the transfer destination physical host, based on a predetermined determination criterion for synchronization;
• issuing an instruction of switching from the virtual machines on the transfer source physical host to the virtual machines on the transfer destination physical host, if, for all the virtual machines, the data of the virtual machine on the transfer source physical host is synchronized with the data of the virtual machine on the transfer destination physical host, based on a result of the determining;
• and
• continuing transmitting the data from the transfer source physical host to the transfer destination physical host until the instruction of the switching is issued.

A migration system comprising:

• a transfer means for transmitting memory data of a plurality of virtual machines from a transfer source physical host to a transfer destination physical host to synchronize data of the virtual machines on the transfer source physical host with data of the virtual machines on the transfer destination physical host;
• a determination means for determining, for each of the virtual machines, whether the data of the virtual machine on the transfer source physical host is synchronized with the data of the virtual machine on the transfer destination physical host, based on a predetermined determination criterion for synchronization;
• and
• a control means for issuing an instruction of switching from the virtual machines on the transfer source physical host to the virtual machines on the transfer destination physical host, based on a result determined by the determination means, wherein
• the control means issues the instruction of the switching if, for all the virtual machines, the data of the virtual machine on the transfer source physical host is synchronized with the data of the virtual machine on the transfer destination physical host, and
• the transfer means continues transmitting the data from the transfer source physical host to the transfer destination physical host until the instruction of the switching is issued.