基于Richards模型的数据中心骨干网络带宽分配策略  

Richards Model Based Data Center Backbone Network Bandwidth Allocation Policy

作　　者：孟飞[1] 兰巨龙[1] 胡宇翔[1] 

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：《计算机科学》2016年第1期133-136,153,共5页Computer Science

基　　金：国家重点基础研究发展计划("973"计划)课题(2012CB315901;2013CB329104);国家自然科学基金课题(61372121;61309019);国家高技术研究发展计划("863"计划)课题(2013AA013505)资助

摘　　要：针对数据中心间骨干网络中存在大量突发性强的小流而难以实时跟随流量变化对其进行带宽分配的问题,提出了基于Richards种群生长模型的数据中心骨干网络带宽分配策略(RBA)。该策略采用闭环反馈控制系统实时分配带宽,以基于Richards曲线设计链路的反馈控制因子作为此系统的反馈量,可对突发流量做出平滑响应,并根据时延敏感性的不同,采用不同的异速生长参数得到不同的流量速率增长曲线,以满足时延敏感流量的QoS需求。在Mininet平台上进行了实验仿真并与典型的带宽分配策略进行了对比,结果表明RBA不但可对突发流量提供较高的带宽分配效率,还确保了各流对带宽资源竞争的公平性。There are large numbers of bursty short flows in inter-data center backbone network.It is difficult to dynamically adapt to the traffic patterns allocating bandwidth in real-time.For the problem,a Richards model based bandwidth allocation policy（RBA）was proposed and the closed-loop feedback control system was used for real-time bandwidth allocation.Based on Richards curve,the feedback control factor of each link was designed as the feedback of the system,which can make smooth response to bursty traffic.Furthermore,according to the time delay sensitivity of flows,different flow rate growth curves can be derived depending on different allometric parameters,which meet the QoS requirements of delay sensitive flows.Simulation on a Mininet testbed shows that the proposed policy can effectively guarantee the bandwidth for flows while ensuring the allocation fairness.

关 键 词：数据中心 RICHARDS 闭环反馈 带宽分配 Mininet 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]