Journals Proceedings

Abstract

TCP Incast is a pathological behavior of TCP that results in gross under-utilization of link capacity in certain many-to-one communication patterns. The many-to-one communication is the main transmission mode in data center networks. In this paper, we modify the most famous delaybased TCP, Vegas, and propose a new congestion control mechanism for data center networks. The proposed DCVegas can quickly and appropriately adjust its congestion window size without the special help of the intermediate nodes. Through extensive NS-2 simulations, the results of DCVegas are compared with that of IA-TCP and TCP NewReno. DCVegas outperforms IA-TCP and NewReno in a variety of conditions. The proposed DCVegas maintains the end-to-end approach and effectively avoids the occurrence of TCP Incast in data center networks.