Fault tolerant system and method for performing fault tolerant virtual machines synchronization

摘要

A fault tolerant system includes a primary virtual machine formed on a primary machine in which a primary hypervisor runs, and configured to input virtual interrupt based on an external interrupt from the primary hypervisor to a primary guest OS, and a secondary virtual machine formed on a secondary machine in which a secondary hypervisor runs, and configured to input virtual interrupt to a secondary guest OS on the basis of timing information on the virtual interrupt transmitted from the primary virtual machine. The primary virtual machine is configured to determine whether the virtual interrupt is generated, or not, upon receiving the external interrupt from the primary hypervisor, and only if it is determined that the virtual interrupt is generated, the primary virtual machine is configured to input the virtual interrupt to the primary guest OS, and to transmit timing information on the virtual interrupt to the secondary virtual machine.