Patent ID: 9519516
Filing Date: 2016-12-13
CPC Classification: G06F

Claim Text:
1. A migration system comprising: a transfer unit which transmits 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 unit which determines, 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 unit which issues 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 unit, wherein the control unit 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 unit continues transmitting the data from the transfer source physical host to the transfer destination physical host until the instruction of the switching is issued.