NeTS-NBD: Next-Generation Content Delivery Networks: Algorithmic and Architectural Challenges

如果互联网要实现其成为下一个伟大的通信媒介的承诺，我们需要建立内容交付网络（简称cdn），以高性能、无限可扩展性和低成本向最终用户交付网络和流媒体内容。CDN的核心是一组核心算法，这些算法可以感知整个网络和互联网，有效地将内容从源路由到边缘服务器，最后从各自的最佳边缘服务器向最终用户提供内容。该项目为应对设计下一代CDN的重大挑战奠定了必要的科学基础。具体而言，该项目预计将做出以下主要研究贡献：(1)准确的成本模型和CDN设计中成本/性能权衡的精确特征；(2)核心CDN功能的新算法被证明是高性能、可扩展和具有成本效益的；(3)使用从互联网上数百个有利位置收集的大量数据集对所提出的算法进行实证验证；(4)将一些研究成果转移到行业。除了研究之外，该项目预计将做出以下主要教育贡献：(1)提供关于构建大型分布式系统（如cdn）的课程，将学术研究和商业系统构建的想法结合在一起并进行交叉授粉，以及(2)指导和培训研究生和本科生前沿分布式系统技术。

If the Internet is to fulfill its promise of being the next great communication medium, we need to build content delivery networks (CDNs, for short) that deliver web and streaming content to end-users with high performance, infinite scalability, and low cost. At the very heart of a CDN is a core set of algorithms that sense the network and the internet as whole, efficiently routes content from its source to edge servers, and finally serves the content to end-users from their respective optimal edge servers. This project builds the scientific foundation necessary to meet the significant challenges of designing a next-generation CDN. Specifically, the project expects to make the following major research contributions: (1) accurate models for costs and a precise characterization of the cost/performance tradeoffs in CDN design, (2) novel algorithms for core CDN functionalities that are provably high performing, scalable, and cost-effective, (3) empirical validation of the proposed algorithms using extensive data sets collected from hundreds of vantage points on the internet, and (4) technology transfer of some of the fruits of the research to industry. In addition to research, the project is expected make the following major educational contributions: (1) course offering on building large-scale distributed systems (such as CDNs) that bring together and cross-pollinate ideas from both academic research and commercial system building, and (2) mentoring and training of graduate and undergraduate students in cutting-edge distributed system technologies.