An information processing apparatus, among a plurality of information processing apparatuses that performs parallel computing processing in a parallel computer system, including a memory and a processor coupled to the memory and configured to execute a process including: calculating a centroid position of the information processing apparatuses based on a data length of data for which subsequent reading or writing from or to a file server is requested by the information processing apparatuses and position information on each of the information processing apparatuses; determining a first information processing apparatus that performs data relay according to the calculated centroid position; and collectively receiving or transmitting, when the determined first information processing apparatus that performs data relay is the information processing apparatus, the data for two or more of the information processing apparatuses.