PECASE: WisWeb: Scalable, Consistent, High-Performance WWW Proxy Caching

本研究的重点是改进WWW代理缓存，以维持互联网上Web的持续增长。缓存是可用于提高Web可销售性的最重要技术之一。该研究针对当前困扰Web缓存系统的四个主要问题：缺乏强缓存一致性、不支持服务器对缓存访问的控制、不灵活的缓存算法和较差的性能。为了解决这些问题，本项目将探索通过基于租约的失效协议、支持服务器在缓存访问时提供处理的主动缓存架构、适应网络条件并利用大型代理缓存的独特功能来减少网络拥塞的Web缓存策略、高性能可扩展的代理架构和缓存共享协议，在WWW中包括强大的缓存一致性维护的方法。结合起来，这些努力有望从质量上提高Web的可伸缩性和可用性，并支持Web在我们的社会中扮演的日益重要的角色。教育活动包括开发小型互联网模拟器，培养“崩溃和燃烧”实验室，以及其他旨在增加本科生研究参与的举措。

This research focuses on improving WWW proxy caching in order to sustain the continued growth of the Web on the Internet. Caching is one of the most important techniques that can be used to increase the salability of the Web. The research targets four major problems that currently plague Web caching systems: lack of strong cache consistency, no support for server control on cache accesses, inflexible caching algorithms, and poor performance. In order to solve these problems, this project will explore means to include strong cache consistency maintenance in WWW via lease-based invalidation protocols, active cache architecture that supports server-supplied processing upon cache access, Web caching strategies that adapt to network conditions and utilize the unique capabilities of large proxy caches to reduce network congestion, and high-performance scalable proxy architectures and cache sharing protocols. Combined, these efforts promise to qualitatively improve the scalability and availability of the Web, and to support the increasingly important role that the Web plays in our society. The educational activities include developing the mini-scale Internet emulator, nurturing the "crash and burn" lab, and other initiatives aimed at increasing the research involvement of undergraduate students.