Patent ID: 8539045

Claim:
A host system for maintaining virtual connectivity in live-migration of a virtual machine comprising: a virtual machine migration controller for performing live-migration for moving a virtual machine and driving the virtual machine; a virtual connection unit for establishing a virtual connection with a remote device server to which a device allocated to the virtual machine is connected, and receiving from the remote device server data transmitted from the device during the live-migration; and a virtual controller for providing information for establishing the virtual connection to a destination host of the live-migration, or receiving the information for establishing the virtual connection from a source host from which the live-migration starts and providing the information to the virtual connection unit, driving the virtual machine which has live-migrated by controlling the virtual machine migration controller to thereby provide the data received by the virtual connection unit to the driven virtual machine, wherein when the live-migration starts, the virtual controller recognizes a data transmission stop point in data transmission and provides the data transmission stop point to the remote device server, and wherein the remote device server stores the data transmitted to and received from the device after the transmission stop point in data transmission, and provides the stored data to the destination host.