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Spare a Little Change? Towards a 5-Nines Internet in 250 Lines of Code.

机译：有零钱吗？通过250行代码实现5线互联。

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摘要

From its beginnings as a single link between two research institutions in 1969, the Internet has grown in size and scope, to become a global internetwork connecting over 700 million computers, and 1.7 billion users. No longer a niche facility for scientific collaboration, the Internet now touches the lives of the world's population, irrespective of their occupation or geography. It is used by people the world over, to pay bills, read the news, listen to music, watch videos, telephone or video-conference friends and family, and much more. The Internet is the premier communications network of our age.;Unfortunately, however, there are some respects in which the Internet lags the networks it replaces. In particular, with respect to reliability, the Internet falls far short of the Public Switched Telephone Network which proceeded it. Whereas the PSTN sought, and often delivered the vaunted "five nines" of reliability, the Internet struggles to compete. As for the cause of this reliability shortfall, available evidence indicates that much of the shortfall is due to the unreliability of IP routers themselves.;Given the importance of a reliable Internet to contemporary society, vendors and researchers have proposed a number of solutions to either improve the reliability of individual IP routers, or to make networks more resilient to the unavailability of a single router. While having some promise, these existing solutions face significant obstacles to widespread deployment. Thus, in this dissertation, we endeavor to find or construct a practical, readily deployable, method for mitigating the outages caused by IP routers.;To achieve our goal, we take inspiration from previous proposals, which advocated the use of link migration. These proposals improve network resilience, by moving links away from a failed (or failing) router, to an in-service router. To understand the constraints of a practical solution, and resolve the limitations of previous proposals, we conduct extensive experimentation, and study source code and protocol specifications. Using the insights produced by these studies, we construct a practical, readily deployable migration solution with sub-second outage times.
机译：互联网从1969年作为两个研究机构之间的单一链接开始，其规模和范围就不断扩大，已成为连接超过7亿台计算机和17亿用户的全球互联网络。互联网已不再是进行科学合作的利基设施，如今已触及世界人口的生活，无论他们的职业或地理位置如何。它被全世界的人们用来支付账单，阅读新闻，听音乐，观看视频，电话或视频会议的朋友和家人等等。互联网是我们这个时代的主要通信网络。但是，不幸的是，在某些方面互联网落后于它所取代的网络。特别是在可靠性方面，Internet远远落后于进行它的公共交换电话网。 PSTN寻求并经常提供吹嘘的“五个九”可靠性，而Internet却在竞争中挣扎。至于造成可靠性不足的原因，现有证据表明，这种不足大部分是由于IP路由器本身的不可靠性所致。考虑到可靠互联网对当代社会的重要性，供应商和研究人员针对以下两种情况提出了许多解决方案：提高单个IP路由器的可靠性，或使网络对单个路由器的不可用性更具弹性。这些现有解决方案虽然有希望，但在广泛部署方面面临着重大障碍。因此，在本文中，我们努力寻找或构建一种实用的，易于部署的缓解IP路由器故障的方法。为了实现我们的目标，我们从以前的建议中汲取了灵感，这些建议提倡使用链路迁移。这些建议通过将链路从发生故障（或发生故障）的路由器移到运行中的路由器，从而提高了网络的弹性。为了了解实际解决方案的约束并解决先前提案的局限性，我们进行了广泛的实验，并研究了源代码和协议规范。利用这些研究得出的见解，我们构建了一个实用的，易于部署的迁移解决方案，且故障时间不到亚秒。

著录项

  • 作者

    Agrawal, Mukesh.;

  • 作者单位

    Carnegie Mellon University.;

  • 授予单位 Carnegie Mellon University.;
  • 学科 Computer Science.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 236 p.
  • 总页数 236
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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