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Conference Paper TCPRand: Randomizing TCP Payload Size for TCP Fairness in Data Center Networks
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Authors
Soojeon Lee, Myungjin Lee, Dongman Lee, Hyungsoo Jung, Byoung-Sun Lee
Issue Date
2015-04
Citation
IEEE Conference on Computer Communications (INFOCOM) 2015, pp.1697-1705
Publisher
IEEE
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/INFOCOM.2015.7218550
Abstract
As many-to-one traffic patterns prevail in data center networks, TCP flows often suffer from severe unfairness in sharing bottleneck bandwidth, which is known as the TCP outcast problem. The cause of the TCP outcast problem is the bursty packet losses by a drop-tail queue that triggers TCP timeouts and leads to decreasing the congestion window. This paper proposes TCPRand, a transport layer solution to TCP outcast. The main idea of TCPRand is the randomization of TCP payload size, which breaks synchronized packet arrivals between flows from different input ports. We investigate how TCPRand reduces consecutive packet drops and demonstrate various benefits of TCPRand with extensive experiments and ns-3 simulation. Our evaluation results show that TCPRand guarantees the superior enhancement of TCP fairness with negligible overheads in all of our test cases.
KSP Keywords
Congestion Window, Data Center Networks, Packet arrivals, TCP fairness, TCP flows, TCP outcast, Traffic pattern, Transport layer, many-to-one, ns-3 simulation, packet drop