一种多租户云的内部网络共享策略  

An Intra-Network Sharing Policy for Multi-Tenant Clouds

作　　者：郑鹏飞[1,2] 尤佳莉[1] 王劲林[1] 曾学文[1] 

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《西安交通大学学报》2014年第8期54-59,共6页Journal of Xi'an Jiaotong University

基　　金：国家高技术研究发展计划资助项目(2011AA01A102);中国科学院战略性先导科技专项资助项目(XDA06010301);国家科技支撑计划资助项目(2012BAH02B03);中国科学院声学所前瞻课题资助项目(Y154211601)

摘　　要：针对现有多租户云无法保障租户网络性能的问题,提出一种内部网络共享策略(FairNet)。该策略平衡了最小保证、公平分配、最大利用3个目标;为虚拟机增加了保证带宽和最大带宽2个定量描述网络性能的新参数,作为计算虚拟机和租户权重的基础;在虚拟机监视器中实现了限速器、队列和调度器;确保主机上每个虚拟机都能分配到一个最小带宽,且剩余带宽被虚拟机按需共享;综合考虑租户在链路发送端和接收端的带宽需求来计算租户权重,并按照权重的比例分配链路带宽。在NS-3仿真器上进行了实验,结果表明:FairNet在不同的通信模式下均能比其他算法更公平地分配链路带宽,有效消除了发送端和接收端不平衡的影响,能够确保虚拟机在主机上的最小带宽,以远比PS-N小的计算代价取得仅次于PS-N的网络公平性。An intra-network sharing policy,FairNet,is proposed to solve the problem that existing multi-tenant clouds cannot guarantee network performance for tenants.The proposed policy gives a balance among three objectives,namely the minimum guarantee,the equitable allocation,and the maximum utilization.Two new parameters,guaranteed bandwidth and bandwidth cap,are introduced to quantitatively describe the network performance of a virtual machine,and are used as the bases of calculating the weights of virtual machines and tenants.Speed limiters,queues,and schedulers are realized in virtual machine monitors.Every virtual machine in a host is able to obtain a minimum bandwidth,and the idle bandwidth is shared by virtual machines with demands.The weights of tenants are calculated by comprehensively considering the bandwidth demand of tenants in sending side and receiving side,and the bandwidth is allocated according to the proportion of weights.Experimental results on the NS-3 simulator show that the FairNet allocates the bandwidth of links more fairly than other algorithms in different communication patterns,and effectively eliminates the influence caused by the unbalance between the sending side and the receiving side.The minimum bandwidth of virtual machines is guaranteed in hosts,and the calculation cost of the FairNet paid is much smaller than that of the PS-N,though the network fairness of the FairNet is little worse than that of the PS-N.

关 键 词：云计算 多租户 内部网络 网络共享 带宽分配 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]