Patent ID: 8595311

Claim:
A network system comprising: a data transfer device that transfers data; and a plurality of information processing apparatuses connected to the data transfer device, the information processing apparatuses including a master information processing apparatus and a slave information processing apparatus, wherein the master information processing apparatus includes a controlling unit that controls an order and a timing in and at which each of the information processing apparatuses transmits data to each of the information processing apparatuses by transmitting to the slave information processing apparatus information of a combination of a transmission destination and a transmitter based on identification information of the information processing apparatuses, and controls each of the information processing apparatuses to execute a same program to perform a test, and each of the information processing apparatuses includes a transmitting unit that transmits the data to each of the information processing apparatuses in the order and at the timing controlled by the controlling unit based on received information of the combination of a transmission destination and a transmitter, wherein the controlling unit transmits to the slave information processing apparatus a combination of a transmission destination and a transmitter obtained by arbitrarily associating each piece of first identification information of the information processing apparatuses with each piece of second identification information of the information processing apparatuses to which a ranking is given according to a test type, the test type being one of an all path communication, all port communication, one-port communication and random transfer.