| 基于用户访问统计特性的流媒体文件复制策略 |
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| 引用本文： | 宋晓华,黄河清,曹元大.基于用户访问统计特性的流媒体文件复制策略[J].南京理工大学学报(自然科学版),2007,31(5):617-621. |
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| 作者姓名： | 宋晓华 黄河清 曹元大 |
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| 作者单位： | 1. 北京理工大学,计算机科学技术学院,北京,100081
2. 华北电网电力调度通信中心,北京,100053 |
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| 摘 要： | 该文采用数理统计方法,根据用户访问统计特性预测文件流行度,结合文件自身属性,确定副本生成数量;针对不同流媒体服务器资源属性,采用动态区间映射方法进行副本放置.实验表明,基于用户访问统计特性的文件复制策略,提高了系统服务性能,保证了系统的负载均衡.
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| 关 键 词： | 服务器集群 Zipf分布 文件复制 副本创建 负载均衡 用户访问 统计特性 流媒体文件 复制策略 Statistics Access Based Strategy Replication File 负载均衡 服务性能 系统 实验 副本放置 映射方法 动态区间 资源属性 流媒体服务器 结合 |
| 文章编号： | 1005-9830（2007）05-0617-05 |
| 修稿时间： | 2007-01-10 |
Media File Replication Strategy Based on Access Statistics |
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| SONG Xiao-hua,HUANG He-qing,CAO Yuan-da.Media File Replication Strategy Based on Access Statistics[J].Journal of Nanjing University of Science and Technology(Nature Science),2007,31(5):617-621. |
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| Authors: | SONG Xiao-hua HUANG He-qing CAO Yuan-da |
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| Institution: | 1. School of Computer Science and Technology, Beijing Institute of Technology, Beijing 100081, China; 2. North China Power Dispatching Transaction Center, Beijing 100053, China |
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| Abstract: | This paper uses statistical method to predict the popularity of the files based on the access statistics and decides on the number of the replicas according to the popularity and the attributes of the file. Taking the attributes of different servers into account, the replica is placed on the corre- sponding servers by the means of dynamic interval mapping. The experimental results show that this replication strategy improves the performance and assures the load balance. |
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| Keywords: | clusters Zipf distribution file replication replica creation load balance |
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