CAREER: A Pull-Based Architecture for Active Web Content Replication

职业生涯：用于主动 Web 内容复制的基于拉动的架构

• 批准号: 0553419
• 负责人: Tarek Abdelzaher
• 金额: $ 6.3万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-12-01 至 2007-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0553419&HistoricalAwards=false
• 关键词: CAREER; Pull; Based; Architecture; Active

The phenomenal growth of the world wide web has made it the most popularInternet application today. Web proxy caching is an important vehicle tomitigate web traffic explosion. Current web caching services are becomingincreasingly inefficient for two reasons. First, the continuous increasein dynamically generated content makes an increasing fraction of web-basedmedia uncacheable. Second, the increasing diversity of web trafficrequires a QoS-aware caching infrastructure while the current caches arebest-effort.In this project we shall design, implement and evaluate an activecaching/replication architecture that resolves the aforementioned majorlimitations. The service augments web caches with the ability toreplicate not only static data but also data sources in a demand-drivenQoS-sensitive fashion. The cache acts as a QoS-aware retailer thatimports whatever active content is in local demand at the current time.Demand-driven data source replication allows dynamic content to begenerated on the cache. Hence, it shifts the need for computing power fromcentralized origin servers to proxies in the vicinity of end-users therebyimproving scalability and allowing cache-assisted customization ofuser-perceived information access performance. By offering data sourcelocation as a dimension to manipulate, the architecture achieves bettersolutions for the web performance optimization problem that arewell-suited to diverse end-user needs.

万维网的惊人增长使其成为当今最受欢迎的互联网应用程序。Web代理缓存是缓解Web流量爆炸的重要手段。目前的网络缓存服务正变得越来越低效，原因有二。首先，动态生成的内容不断增加，使得越来越多的基于网络的媒体无法缓存。其次，日益多样化的网络流量需要一个支持服务质量的缓存基础设施，而目前的缓存是尽力而为的。在这个项目中，我们将设计、实现和评估一个主动缓存/复制体系结构，以解决上述主要限制。这项服务增加了网络缓存的能力，不仅可以复制静态数据，还可以以需求驱动的服务质量敏感的方式复制数据源。缓存充当感知服务质量的零售商，支持当前本地需求中的任何活动内容。按需驱动的数据源复制允许在缓存上生成动态内容。因此，它通过提高可伸缩性并允许缓存辅助定制用户感知的信息访问性能，将计算能力的需求从集中式原始服务器转移到终端用户附近的代理服务器。通过提供数据源定位作为操作的维度，该体系结构为Web性能优化问题提供了更好的解决方案，从而很好地适应了不同的最终用户需求。