Patent ID: 7836158

Claim:
A network synchronization system comprising: at least first and second information processing devices, each one of the first and second information processing devices including a setting information storage unit configured to store a setting information piece of the information processing device; a synchronous shared-storage unit configured to duplicate the setting information piece of the information processing device stored in the setting information storage unit and store the duplicated setting information piece of the information processing device such that the duplicated setting information piece of the information processing device is shared by the other information processing device; and a synchronization control unit configured to update the setting information piece of the information processing device stored in the setting information storage unit to the setting information piece stored in the synchronous shared-storage unit so as to synchronize the setting information piece of the information processing device with that of the other information processing device, wherein for each of the first and second information processing devices the information processing device is configured to compare a setting information with a setting information stored in the other information processing device, the information processing device is configured to obtain the setting information stored in the other information processing device if the information processing device determines that the information processing device does not have the setting information stored in the other information processing device, and the information processing device is configured to obtain the setting information stored in the other information processing device if the information processing device determines that the information processing device has the setting information stored in the other information processing device, and that a last updated date of the setting information stored in the information processing device is older than that of the setting information stored in the other information processing device.