B4: experience with a globally-deployed software defined wan
B4: experience with a globally-deployed software defined wan
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DOI：
10.1145/2486001.2486019
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发表时间：
2013-08
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通讯作者：
S. Jain;Alok Kumar;Subhasree Mandal;J. Ong;L. Poutievski;Arjun Singh;Subbaiah Venkata;Jim Wanderer-Jim
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作者：
S. Jain;Alok Kumar;Subhasree Mandal;J. Ong;L. Poutievski;Arjun Singh;Subbaiah Venkata;Jim Wanderer-Jim
我们介绍了B4的设计，实现和评估，B4是一个连接Google数据中心的私人WAN。 B4具有许多独特的特征：i）部署到适度数量的站点的巨大带宽要求，ii）弹性交通需求，旨在最大化平均带宽，iii）对边缘服务器和网络的完全控制，从而实现速率限制和限制。边缘的需求测量。这些特征导致使用OpenFlow的软件定义的网络体系结构来控制商户硅构建的相对简单的开关。 B4的集中交通工程服务将链接到接近100％的利用率，同时将应用程序在多个途径之间拆分，以平衡容量与应用优先/需求。我们描述了三年的B4生产部署，学习的教训以及未来工作领域的经验。
We present the design, implementation, and evaluation of B4, a private WAN connecting Google's data centers across the planet. B4 has a number of unique characteristics: i) massive bandwidth requirements deployed to a modest number of sites, ii) elastic traffic demand that seeks to maximize average bandwidth, and iii) full control over the edge servers and network, which enables rate limiting and demand measurement at the edge. These characteristics led to a Software Defined Networking architecture using OpenFlow to control relatively simple switches built from merchant silicon. B4's centralized traffic engineering service drives links to near 100% utilization, while splitting application flows among multiple paths to balance capacity against application priority/demands. We describe experience with three years of B4 production deployment, lessons learned, and areas for future work.