Towards a Customizable Web Infrastructure

摘要：随着万维网的出现，连接到互联网的系统之间的信息交换方式发生了根本性的变化。在开发消除由于缺乏足够的CPU、磁盘和网络带宽而产生的性能瓶颈的技术方面，已经进行了大量的研究。虽然这项研究使人们对构建Web中间件有了更深入的了解，但Web中间件如何提供可定制的服务以满足最终用户的需求还不清楚。这个研究项目的目的是研究两个关键思想——支持不同级别的服务和Web组件的可扩展性——以使Web中间件更具响应性和适应性。该研究将首先开发能够控制和调节资源分配到不同请求的组件。这里的研究包括服务质量（QoS）模型的开发，与组件提供的服务和资源有关，QoS架构的探索，在广域网上扩展QoS模型，以及对web缓存的QoS模型的研究。然后，该项目将开发可定制其行为的组件，以适应用户偏好、Web对象特征和操作条件。

Abstract:With the advent of the World Wide Web, there has been a fundamentalshift in the way information is exchanged among systems connected tothe Internet. There has been significant research in developingtechniques for eliminating performance bottlenecks arising due to thelack of sufficient CPU, disk, and network bandwidths. While thisresearch has led to greater understanding about building a Webmiddleware, it is not clear how a Web middleware can provide servicesthat can be customized to suit the needs of end users.This research project aims to investigate two key ideas - support fordifferentiated level of services and extensibility of the Webcomponents - to make a Web middleware more responsive and adaptive.The research will first develop components that can control andregulate allocation of resources to different requests. The researchhere encompasses development of a quality of service (QoS) model withrespect to services and resources provided by the components,exploration of QoS architectures, extension of the QoS model over awide area network, and investigation of a QoS model for webcaching. The project will then develop components whose behaviorcan be customized to suit user preferences, Web object characteristicsand operating conditions.