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AdaptNF: Adaptive Service chain scheduling with stateless migration and NF consolidation

Digital Communications and Networks 2023年第2期9卷 462-472页

作者： Qing Li He Huang Yong Jiang Jingpu Duan Peng Cheng Laboratory Shenzhen518000China Tsinghua Shenzhen International Graduate School Shenzhen10003China Southern University of Science and Technology Shenzhen14325China

The combination of network function virtualization and software-defined networking allows various network functions to process flows according to their characteristics and requirements.Due to the highly dynamic nature of the workload,the network infrastructure needs to properly schedule the underlying resources in order to respond to workload changes in a timely manner.However,the existing NFV platform lacks a comprehensive solution for how to scale under workload variation,which may seriously hurt the overall system performance.To improve the scalability of the NFV platform and ensure consistent high performance under dynamic workloads,we propose AdaptNF,a novel NFV platform designed to support a combination of course-grained and fine-grained resource scheduling strategies.To deal with resource imbalance,which is the essential scheduling problem that leads to insufficient NFV performance,AdaptNF adopts a novel algorithm that can efficiently balance the workload among multiple network function instances through stateless flow migration.Our controlled experiments show that the AdaptNF scheme can optimize resource allocation and ensure outstanding performance after scaling.In terms of network throughput and latency,AdaptNF significantly improves the performance of the underlying NFV platform.

关键词： Network function virtualization Software-defined networking Service chain Flow migration Dynamic scale

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基于SDN的SGi/Gi-LAN Service chain关键技术研究

基于SDN的SGi/Gi-LAN Service Chain关键技术研究

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2014年度全国无线及移动通信学术大会(WMC'14)

作者：薛淼符刚朱斌李勇辉中国联通网络技术研究院

对运营商SGi/Gi-LAN的增值业务及复杂流处理部署的现状及两种方式增强网关和静态业务链进行分析和比较,介绍基于SDN的Service chain的总体架构及基本处理流程,对Service chain发展过程中面临的标准制定、关键问题及部署方面的需求进行... 详细信息

对运营商SGi/Gi-LAN的增值业务及复杂流处理部署的现状及两种方式增强网关和静态业务链进行分析和比较,介绍基于SDN的Service chain的总体架构及基本处理流程,对Service chain发展过程中面临的标准制定、关键问题及部署方面的需求进行分析。

关键词： Service chain 软件定义网络增值业务网络架构

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NfvInsight:A Framework for Automatically Deploying and Benchmarking VNF chains

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Journal of Computer Science & Technology 2022年第3期37卷 680-698页

作者：徐天妮孙海锋张笛周小明隋秀峰王卅黄群包云岗 State Key Laboratory of Computer Architecture Institute of Computing TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Peng Cheng Laboratory Shenzhen 518055China Department of Computer Science and Technology Peking UniversityBeijing 100871China

With the advent of virtualization techniques and software-defined networking(SDN),network function virtualization(NFV)shifts network functions(NFs)from hardware implementations to software appliances,between which exists a performance gap.How to narrow the gap is an essential issue of current NFV research.However,the cumbersomeness of deployment,the water pipe effect of virtual network function(VNF)chains,and the complexity of the system software stack together make it tough to figure out the cause of low performance in the NFV system.To pinpoint the NFV system performance,we propose NfvInsight,a framework for automatic deployment and benchmarking VNF chains.Our framework tackles the challenges in NFV performance analysis.The framework components include chain graph generation,automatic deployment,and fine granularity measurement.The design and implementation of each component have their advantages.To the best of our knowledge,we make the first attempt to collect rules forming a knowledge base for generating reasonable chain graphs.NfvInsight deploys the generated chain graphs automatically,which frees the network operators from executing at least 391 lines of bash commands for a single test.To diagnose the performance bottleneck,NfvInsight collects metrics from multiple layers of the software stack.Specifically,we collect the network stack latency distribution ingeniously,introducing only less than 2.2%overhead.We showcase the convenience and usability of NfvInsight in finding bottlenecks for both VNF chains and the underlying system.Leveraging our framework,we find several design flaws of the network stack,which are unsuitable for packet forwarding inside one single server under the NFV circumstance.Our optimization for these flaws gains at most 3x performance improvement.

关键词： network function virtualization(NFV) Service chain performance bottleneck network stack latency

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