两段式虚拟网络功能硬件加速资源部署机制

Two-stage hardware acceleration resource deployment mechanism for virtual network function

设计硬件加速机制,解决软件定义网络/网络功能虚拟化(SDN/NFV)架构中虚拟网络功能(VNF)的性能受限问题,成为当前的研究热点。在引入VNF硬件加速资源后,如何实现对加速资源的统一管理和部署,是亟待解决的问题。为此,首先提出了基于服务器端加速卡和Open Flow交换机的VNF加速资源的统一管理架构;在此基础上,对加速资源部署问题进行建模,通过分析VNF加速资源对服务链映射的影响,提出了VNF加速资源部署策略的评价指标;最后,设计了两段式的加速资源部署算法求解该问题。实验结果表明,与只考虑节点单一属性的部署算法(SARD)和均匀部署算法(UARD)相比,所提机制能够优化部署加速资源,加速资源承载的流量和加速资源的利用率分别提升41.4%和14.5%。

It is a hot research topic to solve the low performance of Virtual Network Function(VNF)in SDN/NFV(Software Defined Networking/Network Function Virtualization)architecture by designing hardware acceleration mechanism.After introducing the hardware acceleration resources to VNF,how to control and deploy these acceleration resources has been an urgent problem.To solve the problems above,a uniform hardware acceleration management architecture based on the accelerator cards on servers and OpenFlow switches was proposed.Based on this architecture,the model of acceleration resource deployment was built,and the evaluation indicators for the resource deployment mechanism was proposed by analyzing the impact of acceleration resources on service chain mapping.Finally,a two-stage acceleration resource deployment algorithm was designed.The experimental results show that,compared with Single-attribute Acceleration Resource Deployment algorithm(SARD)and Uniform Acceleration Resource Deployment algorithm(UARD),the proposed mechanism can optimize the deployment of the acceleration resources and improve the total traffic handled by acceleration resources and the utilization of acceleration resources by 41.4%and 14.5%respectively.