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首页> 外文期刊>European Journal of Operational Research >Obtaining the optimal cache document replacement policy for the caching system of an EC website
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Obtaining the optimal cache document replacement policy for the caching system of an EC website

机译：获取EC网站缓存系统的最佳缓存文档替换策略

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摘要

Adopting a proper cache document replacement policy is critical to the performance of a caching system. Among the existing cache document replacement policies, no one policy can surpass all the other policies in every case. Besides, the most suitable cache document replacement policy for a caching system is often chosen from the existing policies, which cannot guarantee the optimality of the chosen policy. These phenomena motivate us to construct a cache document replacement policy which content can be tailored to the specific requirements of a caching system. In this study, the optimal linear combination (OLC) cache document replacement policy tailored to the requirements of the caching system is to be found out. To evaluate the effectiveness of the proposed methodology, an experimental EC website has been constructed, and the log file of the website server was used as the data source to evaluate the performances of various cache document replacement policies under different cache sizes. In our simulation experiments, the OLC policies outperformed the other traditional policies by increasing the hit rate and the byte hit rate up to 7% and 11%, respectively. (c) 2006 Elsevier B.V. All rights reserved.
机译：采用适当的缓存文档替换策略对于缓存系统的性能至关重要。在现有的缓存文档替换策略中，没有一种策略可以在所有情况下都超过所有其他策略。此外，经常从现有策略中选择最适合缓存系统的缓存文档替换策略，这不能保证所选策略的最优性。这些现象促使我们构建了一个缓存文档替换策略，该策略的内容可以根据缓存系统的特定要求进行定制。在这项研究中，将找到适合于缓存系统要求的最佳线性组合（OLC）缓存文档替换策略。为了评估所提出方法的有效性，已构建了一个实验性EC网站，并使用网站服务器的日志文件作为数据源来评估在不同缓存大小下各种缓存文档替换策略的性能。在我们的模拟实验中，OLC策略的命中率和字节命中率分别提高了7％和11％，从而胜过其他传统策略。 （c）2006 Elsevier B.V.保留所有权利。

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