| 摘要 |
A virtual machine system for duplicating a first virtual machine to generate one or more second virtual machines is provided with a management unit that manages each memory area accessible by the first virtual machine so that after generation of the second virtual machines, every virtual machine is permitted to perform a read access to the memory area until any virtual machine performs a write access to the memory area, a determination unit that determines whether each memory area is a specific memory area, a detection unit that detects, after detecting a write access to a specific memory area, that a virtual machine other than the virtual machine performing the write access is attempting access to the specific memory area, and a memory allocation unit that acquires and allocates a new memory area to the virtual machine detected to be attempting access to the specific memory area.
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