STORAGE SYNCHRONIZATION SYSTEM, VIRTUAL MACHINE, STORAGE SYNCHRONIZATION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To reduce a transfer amount for synchronization and a resource use amount for synchronization, in a system which synchronizes an execution state (a CPU, memory and a device) and storage of virtual machines running on different physical machines.

SOLUTION: A storage synchronization control means of a virtual machine on a transmission side comprises; a difference transmission means acquiring memory of a difference since the last synchronization and transmitting the difference of an execution state to a virtual machine on a reception side when writing to the storage on the transmission side occurs; and a writing control means transmitting a write instruction to the storage of the virtual machine on the transmission side to the virtual machine on the reception side. A storage synchronization control means of the virtual machine on the reception side comprises a writing means writing the memory of the virtual machine on the reception side to the storage of the virtual machine on the reception side based on the write instruction received from the virtual machine on the transmission side.

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