HetFlow: A distributed delay-based congestion control for data centers to achieve ultra low queueing delay
Mahmoud Bahnasy, Halima Elbiaze, Bochra Boughzala · 2017
Data center applications require strict characteristics regarding packet loss, fairness, head-of-line blocking, latency, and low processing overhead. Motivated by the emergence of IEEE Data Center Bridging, we explore the possibility of controlling congestion in Ethernet layer while guaranteeing those requirements. We propose HetFlow (Heterogeneous Flow) as a delay-based congestion control mechanism that controls & prevents congestion while achieving minimum queue length, minimum network latency, and high link utilization. HetFlow guarantees fairness between flows with different packet sizes and different round-trip times (RTTs). The results obtained through prototype and simulations show that HetFlow succeeded in preventing congestion and achieving low queue length, high link utilization, and fairness between flows.