Patent ID: 7263036

Claim:
A time correction system for performing time correction by obtaining standard time information from outside the time correction system via a communication network, the time correction system operable in a cluster system comprising a plurality of devices, an operation state of each device of the plurality of devices being switched between one of an operating state and a standby state as necessary for executing processing by the cluster system, the time correction system comprising: first time correction processing means for performing time correction in a device switched to the operating state by obtaining standard time information from the outside, having the device switched to the operating state as a representative device among the devices in the cluster system, the representative device for obtaining the standard time information from the outside; second time correction processing means for performing time correction in a device switched to the standby state, the device switched to the standby state obtaining time information of the device switched to the operating state, having the device switched to the operating state as a master and the device switched to the standby state as a slave in the cluster system; and means for setting the device switched to the operating state as the representative device and as a master and for setting the device switched to the standby state as a slave when there is a change recognized in the operation state through controlling the operating state of each device of the cluster system so as to switch time correction processing to correspond to the settings.