Information processing system and data processing method

An information processing system comprising:

• an input device configured to include a first memory and a first processor coupled to the first memory, the first processor being configured to sequentially transmit a plurality of first processing data pieces to each of a plurality of data processing devices;
• a data processing device of the plurality of data processing devices, coupled to the input device and configured to include a second memory and a second processor coupled to the second memory, the second processor being configured to sequentially execute data processings on a plurality of first processing data pieces to generate a plurality of first processed data pieces;
• and
• an output device coupled to each of the plurality of data processing devices and configured to include a third memory and a third processor coupled to the third memory, the third processor being configured to sequentially transmit a plurality of first data request signals to a first data processing device selected among the plurality of data processing devices,
• wherein the second processor of the first data processing device is configured to sequentially transmit the plurality of first processed data pieces to the output device in response to the plurality of first data request signals from the output device, respectively.