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|1. (WO2018055686) INFORMATION PROCESSING SYSTEM|
|Title:||INFORMATION PROCESSING SYSTEM|
An information processing system according to an embodiment of the present invention includes: a main system provided with a plurality of main storage devices; and a subsystem provided with a plurality of main storage devices, wherein the main storage device and the sub-storage device system each have one or more volumes and journal volumes. When receiving a write command including a time stamp, the main system creates and transmits, to the main storage device, a journal creation command including the write data and time stamp. The main storage device, which has received the journal creation command, stores the write data in the volume(s) and creates and stores, in the journal volume(s), a journal including the write data and time stamp. When acquiring a plurality of journals created by the main system, the subsystem determines, on the basis of the time stamp included in each journal, a journal that is transmittable to the sub-storage device, and creates and issues, to the sub-storage device, a journal restore command on the basis of the content of the determined journal. In addition, the sub-storage device, which has received the journal restore command, stores, in the volume included in the sub-storage device, the write data included in the journal restore command.