| 基于比例命中率的Web缓存区分服务 |
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| 引用本文： | 高昂,慕德俊,胡延苏,潘文平. 基于比例命中率的Web缓存区分服务[J]. 计算机科学, 2010, 37(4): 55 |
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| 作者姓名： | 高昂 慕德俊 胡延苏 潘文平 |
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| 作者单位： | 1. 西北工业大学自动化学院,西安,710072
2. 南京航空航天大学自动化学院,南京,210016 |
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| 基金项目： | 国防基础研究项目(C2720061361)资助 |
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| 摘 要： | 基于反馈控制理论,通过系统辨识设计了缓存控制器。动态调整不同类别缓存对象的缓存空间,可保证高优先级Web对象的高命中率,而不同类别的Web对象命中率之比保持不变。在服务器端实现了基于比例命中率的缓存区分服务。经实验验证,在GDSF,LRU,LFU缓存替换算法下,无论是请求命中率还是字节命中率,均有良好的区分效果。
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| 关 键 词： | 比例命中率 Web缓存 区分服务 |
| 收稿时间： | 2009-05-05 |
| 修稿时间： | 2009-07-05 |
Differentiated Service in Web Cache Based on Proportional Hit Rate |
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| GAO Ang,MU De-jun,HU Yan-su,PAN Wen-ping. Differentiated Service in Web Cache Based on Proportional Hit Rate[J]. Computer Science, 2010, 37(4): 55 |
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| Authors: | GAO Ang MU De-jun HU Yan-su PAN Wen-ping |
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| Affiliation: | College of Automation/a>;Northwest Polytechnical University/a>;Xi'an 710072/a>;China;College of Automation/a>;Nanjing University of Aeronautics and Astronautics/a>;Nanjing 210016/a>;China |
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| Abstract: | Based on feedback control theory,this paper designed a cache space controller through system identification.By dynamically reallocating cache space between different Web objects,the controller could guarantee the priority Web objects a higher hit rate and the proportions of hit rates between different kinds of Web objects constant.The experimental results demonstrate the proposed approach achieves the proportional hit rate guarantee under GDSF,LRU and LFU cache replacement algorithms. |
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| Keywords: | Proportional hit rate Web caching Differentiated service |
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