Method for controlling network flow rate based on RDMA (Remote Direct Memory Access) communication

The invention discloses a network flow rate control method based on RDMA (Remote Direct Memory Access) communication. The method comprises the following steps that: a controller acquires current rate and target rate of a current RDMA flow and network data transmission rate information; 2) the controller calculates the optimal sending rate of the current data packet according to the current rate, the target rate and the network data transmission rate information in the step 1); 3) the controller changes link congestion information carried in the data packet according to the optimal sending rate calculated in the step 2); and 4) the network card adjusts a sending rate to send a subsequent data packet according to the flow rate information modified or added in the step 3). According to the method for controlling the network flow rate based on the RDMA communication, the controller can be arranged in the network card and can also be arranged on the switch or arranged on a hardware module independent of the networ