计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

数据中心网络中高并发TCP传输的随机退避方法

郭月月,黄家玮,刘敬玲,王建新   

  1. (中南大学 信息科学与工程学院,长沙 410083)
  • 收稿日期:2017-03-17 出版日期:2018-04-15 发布日期:2018-04-15
  • 作者简介:郭月月(1991—),女,硕士研究生,主研方向为网络协议;黄家玮,教授、博士生导师;刘敬玲,硕士研究生;王建新,教授、博士生导师。
  • 基金项目:

    国家自然科学基金(61572530);赛尔网络下一代互联网技术创新项目(NGII20160113)。

Random Backoff Method for Highly Concurrent TCP Transmission in Data Center Network

GUO Yueyue,HUANG Jiawei,LIU Jingling,WANG Jianxin   

  1. (School of Information Science and Engineering,Central South University,Changsha 410083,China)
  • Received:2017-03-17 Online:2018-04-15 Published:2018-04-15

摘要:

在现代数据中心网络中,分散聚合的传输模式容易导致瓶颈链路上的吞吐率崩塌,产生TCP Incast现象。为此,提出一种随机退避的方法,来降低TCP流突发传输的并发程度,通过计算最优的随机退避时间,控制瓶颈链路的瞬时拥塞程度,有效解决TCP Incast问题。从理论上建模分析随机退避时间区间内随机退避各TCP流时的超时概率和吞吐率。实验结果表明,该方法可以有效避免传输超时事件,将TCP流并发度和网络吞吐率分别提升2倍和80倍。

关键词: 数据中心网络, TCP Incast现象, 分散聚合传输模式, 随机退避, 传输控制协议

Abstract:

In the modern data center network,the partition aggregation transmission pattern easily leads to the throughput collapse on the bottleneck link,resulting in TCP Incast phenomenon.This paper proposes a random backoff method to reduce the concurrency degree of TCP flow burst transmission.By calculating the optimal random backoff time,the instantaneous congestion degree of bottleneck link is controlled and the TCP Incast problem is solved effectively.And it models and analyzes in theory the time-out probability and throughput when all TCP flows retreat randomly in the random backoff time interval.Experimental results show that the method can effectively avoid the transmission timeout event.The TCP flow concurrency and network throughput are increased by 2 times and 80 times respectively.

Key words: data center network, TCP Incast phenomenon, partition aggregation transmission pattern, random backoff, Transmission Control Protocol(TCP)

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