Distributed storage system suitable for sensor data

A distributed information storage system comprising

• a plurality of data storage devices configured to conduct data communication with data transmission devices and data receiving devices,
• each data storage device of the plurality of data storage devices comprising:
• a data acquiring unit configured to acquire data transmitted together with an identifier indicating type of data transmitted from a data transmission device corresponding to an identifier indicating a data receiving device assigned to the data storage device from among data transmitted from the data transmission devices, based on a first correspondence table associating identifiers indicating the data receiving devices and identifiers indicating types of data acquired by the data receiving devices and a second correspondence table indicating a correspondence between identifiers indicating the data storage devices and identifiers indicating the data receiving devices assigned to the data storage devices, the first correspondence table and the second correspondence table being shared among the data storage devices;
• a storage medium configured to store the acquired data;
• a request acquiring unit configured to acquire a data request from the data receiving device;
• a determining unit configured to determine whether or not the acquired data request is transmitted from the data receiving device assigned to the data storage device;
• and
• an output unit configured to output data stored in the storage medium to the data receiving device assigned to the data storage device when the acquired data request is determined as being acquired from the data receiving device assigned to the data storage device,
• wherein the determining unit determines a data storage device responsible for a data receiving device that is a sender of the data request based on the second correspondence table, when the acquired data request is not acquired from the data receiving device assigned to the data storage device,
• each of the data storage devices further comprises a relay unit configured to acquire data stored in the storage medium of the data storage device that is determined as the data storage device responsible for the data receiving device that has sent the data request, and the output unit outputs the acquired data via the relay unit to the data receiving device that has sent the data request.