SA-TCP: A Novel Approach to Mitigate TCP Incast in Data Center Networks

In high bandwidth and low latency data center networks, when multiple data senders simultaneously communicate with a single receiver, namely in many-to-one communication pattern, it is frequently occurred that the burst data overload the receiver´s switch buffers, which leads to TCP throughput collapse. This phenomenon is termed to TCP Incast problem, which has become a new hot research topic in recent years. In this paper, we propose a novel TCP congestion control algorithm named Stochastic Adjustment TCP (SA-TCP) which can stochastically adjust the congestion control window to avoid the synchronization among many parallel flows. The experimental results verify that SA-TCP can mitigate TCP Incast effectively.