A computer system comprising: a plurality of communication control devices; a plurality of computation nodes of transmission sources that transmit data through the communication control devices; and a plurality of computation nodes of transmission destinations that receive data through the communication control devices, wherein the computation node of the transmission source includes: a data transmitting unit that transmits data to the computation node of the transmission destination; and an adjustment unit that adjusts an interval between data transmitted by the data transmitting unit based on a transmission node number included in received control data, wherein the communication control device includes: an input unit that inputs the data transmitted by the computation node of the transmission source; an output unit that outputs data to be transmitted to the computation node of the transmission destination; a transmission node number storing unit that stores the transmission node number representing the number of the computation nodes transmitting data through the communication control device; an update processing unit that updates the transmission node number stored by the transmission node number storing unit in a case where the output unit outputs data; a comparison unit that compares a transmission node number included in the data input by the input unit and the transmission node number stored by the transmission node number storing unit with each other; and an overwriting unit that overwrites the transmission node number included in the data output by the output unit with the transmission node number stored by the transmission node number storing unit in a case where the transmission node number stored by the transmission node number storing unit is larger than the transmission node number included in the data input by the input unit as a result of the comparison performed by the comparison unit, and wherein the computation node of the transmission destination includes a control data transmitting unit that transmits the control data including the transmission node number included in the received data to the computation node of the transmission source. a plurality of communication control devices; a plurality of computation nodes of transmission sources that transmit data through the communication control devices; and a plurality of computation nodes of transmission destinations that receive data through the communication control devices, a data transmitting unit that transmits data to the computation node of the transmission destination; and an adjustment unit that adjusts an interval between data transmitted by the data transmitting unit based on a transmission node number included in received control data, an input unit that inputs the data transmitted by the computation node of the transmission source; an output unit that outputs data to be transmitted to the computation node of the transmission destination; a transmission node number storing unit that stores the transmission node number representing the number of the computation nodes transmitting data through the communication control device; an update processing unit that updates the transmission node number stored by the transmission node number storing unit in a case where the output unit outputs data; a comparison unit that compares a transmission node number included in the data input by the input unit and the transmission node number stored by the transmission node number storing unit with each other; and an overwriting unit that overwrites the transmission node number included in the data output by the output unit with the transmission node number stored by the transmission node number storing unit in a case where the transmission node number stored by the transmission node number storing unit is larger than the transmission node number included in the data input by the input unit as a result of the comparison performed by the comparison unit, and wherein the computation node of the transmission destination includes a control data transmitting unit that transmits the control data including the transmission node number included in the received data to the computation node of the transmission source.