The effect of the congestion control window size on the TCP incast and its implications

This paper analyzes the TCP incast problem in data centers by focusing on the relationships between the TCP throughput and the congestion control window size of TCP. The root causes of the TCP incast problem are explored and the essence of the current methods to smooth the TCP incast is well explained. To verify our analysis, extensive simulations are conducted. The simulation results are in conformity with the estimated results of our analysis, which verifies the accuracy of our analysis. The analysis as well as the simulation results are helpful for the improvement of the TCP incast problem.