Abstract: A parallel computer system in which a plurality of host computers are connected in a network and a plurality of servers having different attributes are allocated to the plurality of host computers. One of the plurality of host computers is previously designated as a manager node. Each of the host computers judges whether or not the own host computer is the manager node when started. The host computer decided as the manager node issues through the network to the other host computers a request demanding report of information on respective resources possessed by the other host computers on a broadcast transmission basis. In response to the broadcast transmission, the other host computers transmit information on their own resources through said network to said manager node.