网络功能虚拟化场景下的并行加速

毕军; 孙晨; 于恒

doi:10.11959/j.issn.1000-0801.2018216

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网络功能虚拟化场景下的并行加速

专题：SDN/NFV技术与应用 | 更新时间：2024-06-05

- 网络功能虚拟化场景下的并行加速
- NFP:enabling network function parallelism in NFV
- 电信科学 2018年34卷第7期页码：41-48
- 作者机构：
- 作者简介：
  
  [ "毕军（1972-），男，博士，清华大学网络科学与网络空间研究院副院长、计算机科学与技术学科和网络空间安全学科博士生导师，长江学者特聘教授，北京信息科学与技术国家研究中心未来网络理论与应用研究部主任，主要研究方向为互联网体系结构、SDN/NFV、IPv6安全体系结构等。" ]
  [ "孙晨（1992-），男，清华大学计算机系博士生，主要研究方向为SDN/NFV、网络测量。" ]
  [ "于恒（1995-），男，清华大学计算机系博士生，主要研究方向为SDN/NFV。" ]
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2018216
  中图分类号： TP393
- 网络出版日期：2018-07，
  
  纸质出版日期：2018-07-20
- 稿件说明：
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毕军, 孙晨, 于恒. 网络功能虚拟化场景下的并行加速[J]. 电信科学, 2018,34(7):41-48.

Jun BI, Chen SUN, Heng YU. NFP:enabling network function parallelism in NFV[J]. Telecommunications science, 2018, 34(7): 41-48.
毕军, 孙晨, 于恒. 网络功能虚拟化场景下的并行加速[J]. 电信科学, 2018,34(7):41-48. DOI： 10.11959/j.issn.1000-0801.2018216.

Jun BI, Chen SUN, Heng YU. NFP:enabling network function parallelism in NFV[J]. Telecommunications science, 2018, 34(7): 41-48. DOI： 10.11959/j.issn.1000-0801.2018216.

摘要

在网络功能虚拟化场景下，每个网络功能都以软件的形式来实现。但传统的串行网络功能组链方式将带来极大的性能损耗。而如今针对网络功能进行加速的工作，主要集中在优化该串行链的每个组成成分上。提出了一个高性能的系统框架，通过让网络功能并行地对数据分组进行处理，提高网络功能虚拟化场景下服务链的整体性能。该系统由 3 个部分组成。首先，该系统为管理员提供了一个策略描述语言来直观地描述串行或并行的组链意图。然后，该系统的编排器智能地鉴别网络功能之间的依赖性，并基于所提供的策略，生成高性能的“服务图”。最后，该系统的底层实现通过执行轻量级的数据分组复制、分布式的并行分组转发和负载均衡后的数据分组合并来支持网络功能的并行处理。基于DPDK技术，在Linux容器中实现了该系统的原型机。通过实验验证可知，该系统能极大地减少真实世界中服务链的处理时延。

Abstract

Software-based sequential service chains in network function virtualization (NFV) could introduce significant performance overhead.Current acceleration efforts for NFV mainly target on optimizing each component of the sequential service chain.However

based on the statistics from real world enterprise networks

it was observed that 53.8% network function (NF) pairs could work in parallel.In particular

41.5% NF pairs could be parallelized without causing extra resource overhead.NFP was presented

a high performance framework

that innovatively enabled network function parallelism to improve NFV performance.NFP consisted of three logical components.Firstly

NFP provided a policy specification scheme for operators to intuitively describe sequential or parallel NF chaining intents.Secondly

NFP orchestrator intelligently identified NF dependency and automatically compiled the policies into high performance service graphs.Thirdly

NFP infrastructure performed light-weight packet copying

distributed parallel packet delivery

and load-balanced merging of packet copies to support NF parallelism.An NFP prototype based on DPDK in Linux containers was implemented.The evaluation results show that NFP achieves significant latency reduction for real world service chains.

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references

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