基于动态优先级的数据中心网络闲时感知TCP协议  

Dynamic priority-based slack-aware TCP for data center networks

作　　者：刘洪[1] 伊鹏[1] 胡宇翔[1] Liu Hong;Yi Peng;Hu Yuxiang(National Digital Switching System Engineering&Technology Research Center,Zhengzhou 450002,China)

机构地区：[1]国家数字交换系统工程技术研究中心,郑州450002

出　　处：《计算机应用研究》2018年第1期190-194,共5页Application Research of Computers

基　　金：国家"973"计划资助项目(2013CB329104);国家自然科学基金资助项目(61521003;61572519;61502530;61672471);国家"863"计划资助项目(2015AA016102)

摘　　要：针对当前数据中心网络传输机制缺乏对online data-intensive(OLDI)应用软实时性和高吞吐量的综合性能保障的问题,提出了一种基于动态优先级的数据中心网络闲时感知TCP协议(least slack-aware TCP)LSTCP。该协议采用最小空闲时间优先(least slack first,LSF)调度策略对流进行优先级划分,利用ECN机制的反馈,根据流优先级和网络拥塞程度实现拥塞窗口的动态调整,实现对紧急流和截止期越早的流优先调度。实验结果表明,与传统截止时间感知协议相比,LSTCP减少了短流的平均流完成时间,保证了长流的吞吐量特性。Aiming at the problem that current data center network transport mechanism lacks of comprehensive performance guarantee of soft real-time and high throughout for online data-intensive(OLDI)applications,this paper proposed LSTCP,a dynamic priority-based slack-aware transport control protocol for data center network that adopted the least slack first(LSF)scheduling strategy to prioritize flows.Based on the feedback of explicit congestion notification(ECN)mechanism,LSTCP dynamically adjusted congestion window according to the precedence of the flow and the extent of network congestion,thus implemented the priority scheduling for emergency flows and earlier deadline flows.Experiment results show that LSTCP reduces the AFCT(average flow completion time)of short flows and guarantees the throughput of long flows compared with the traditional deadline-aware TCP.

关 键 词：数据中心网络 传输机制 闲时感知 TCP 流完成时间 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]