【作者】 张欣；

【导师】 乐嘉锦；

【作者基本信息】 东华大学 ， 计算机应用， 2005， 硕士

【摘要】 因特网的迅速发展给人们带来了极大的便利,随着社会信息化程度的越来越高,基于Web的应用系统在各个领域使用的越来越广泛。最初主要是静态页面,提供给用户一些更新不太频繁的信息。如今动态页面被广泛地用于我们平时的生活之中,许多Web信息系统提供即时的股票信息、运动会比赛信息,还有一些提供在线交易等服务,用户访问频率和数据更新的频率越来越高,大大加剧了Web服务器和数据库服务器的负担,使得页面的访问速率异常的缓慢。这给基于Web的信息系统带来了新的问题和挑战。 Web缓存是目前在Web信息系统中普遍使用的提高数据访问性能的技术,已经在许多方面得到了成功的应用。它利用对访问过的网页进行存储来避免用户下一次访问该网页时再次访问服务器,用户可以直接在缓存中上得到所要的数据。然而,缓存更多地被用于对静态网页的访问进行优化,对于访问和更新频繁较高的动态网页,缓存技术常常显得无能为力。本文分析了当前流行的几种缓存(Cache)技术及其特点,指出了缓存技术的不足之处。针对这些不足提出了一种基于WebView物化的解决方案,介绍了WebView的概念,WebView物化的模型,时新性和性能评价指标;讨论了在三种不同的物化策略下如何选择有效的方案,给出了一种基于访问和更新的在线物化方案选择算法,通过观察当前的时新性和性能指标,在用户访问和更新历史信息基础的上,动态地调整物化选择方案,从而可以在不影响数据新更多还原

【Abstract】 The rapid development of the internet brings people great convenience. With the informationliazation of the society becoming more and more popular, the application of the web based information system is used more and more widely. Dynamic web page is used in many web based information system. Many information are published as dynamic web pages. Besides, many services are done on the internet, which brings big burden on the web server and database server. The access rate become too slow to tolerate. This is the new challenge of the web based information system.Web caching is widely used to improve the access rate. It caches the web pages in the local place which were read before, thus, people can get it quickly without accessing the web server by accrossing the internet. It seems that web caching cansolve the problem but it doesn’ t work in the circumstance where there are plenty of dynamic web pages which were generated at a instant. This thesis will decribe the characteristic as well the disvantage and put forward a solution based on the materilization of the web view. It will describe the concept, the model,and the performance and quality of web view materilization. It will decribe the selection of the web view materilization strategy and give the algorithm of the strategy, which will greatly improve the performanceThe thesis will base on the 7th national college sports meeting system. It will analyze the development and application fo the information system. Besides, it will deeply describe the function of the sports meeting information system and the application of web view materilization technology. What’ s more, it will attach the importance on the solution of the problem meet with in the implementation of the information system.The thesis will summarize at last and put forward some problem and outlook.更多还原