DATA TRANSMISSION DEVICE, DATA TRANSMISSION SYSTEM, DATA TRANSMISSION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To reduce a level of degradation in robustness of a disaster recovery system.SOLUTION: A data transmission device which is provided in a disaster recovery system, comprises: a transmission unit which transmits data to be used for failure recovery of an application system to a first data storage device or a second data storage device; a detection unit which detects completion of transfer of data which is transmitted to the first data storage device by the transmission unit, from the first data storage device to the second data storage device; and a switch over unit which switches a transmission destination of the transmission unit from the first data storage device to the second data storage device when the detection unit detects completion of data transfer.