| 基于Web访问特性的缓存替换策略 |
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| 引用本文： | 胡伟之,沈富可.基于Web访问特性的缓存替换策略[J].计算机应用,2008,28(Z2). |
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| 作者姓名： | 胡伟之 沈富可 |
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| 作者单位： | 华东师范大学计算机科学技术系,上海,200241 |
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| 摘 要： | 在分析Web轨迹的基础上,找出用户访问Web内容的访问特性:访问再次到达的概率和访问内容大小分布,并建立相应的代价公式,利用这些代价作为计算Web内容价值的要素.根据这些特性判断用户访问内容被再次访问的可能性,提出内容分发网络缓存替换策略.最后通过数值仿真计算与现有替换策略进行比较,说明了该替换策略的优越性.
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| 关 键 词： | 内容分发网络 缓存替换策略 Web轨迹 请求命中率 访问特性 |
Cache replacement policy based on Web request characteristics |
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| HU Wei-zhi,SHEN Fu-ke.Cache replacement policy based on Web request characteristics[J].journal of Computer Applications,2008,28(Z2). |
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| Authors: | HU Wei-zhi SHEN Fu-ke |
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| Affiliation: | HU Wei-zhi,SHEN Fu-ke(Department of Computer Science , Technology,East China Normal University,Shanghai 200241,China) |
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| Abstract: | Based on the analysis of Web trace,the characteristics of the ratio of the request once again at the Web content and the distribution of the content size were computed as a cost formula.According to these characteristics,the probability of the content requested by the user to be requested again was got.A cache replacement policy of the Content Delivery Network(CDN) was proposed,which used Web content size and access frequency as its computing elements.The superiority of the replacement policy over the exist... |
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| Keywords: | content delivery network cache replacement policy Web trace request hit rate request characteristic |
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