A method of allocating a plurality of processes on a plurality of node devices coupled through a network, includes: dividing the plurality of processes into one or more process groups including at least one process among the plurality of processes, based on a bandwidth desired for data communication between processes in the plurality of processes; specifying, for each of the one or more process groups, a node device which is able to perform entirety of processes included in the process group among the plurality of node devices; and allocating the process group on the specified node device, for each of the one or more process groups.