| 分布式视频服务器的动态数据分配算法 |
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| 引用本文： | 陈进才,张江陵,冯丹.分布式视频服务器的动态数据分配算法[J].计算机应用研究,2004,21(3):13-15,22. |
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| 作者姓名： | 陈进才 张江陵 冯丹 |
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| 作者单位： | 华中科技大学,计算机科学与工程系,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目(60273074) |
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| 摘 要： | 针对分布式视频点播系统，提出了三种改进的动态数据分配算法：DRR(Dynamic Round Robin video data allocation)，DBWP(Dynamic Bandwidth Weighted Partition video data allocation)，DPB(Dynamic Popularity Based video data allocation)。仿真结果表明：分别与RR，BWP，PB算法相比，DRR，DBWP和DPB算法具有较好的环境适应性，特别是在视频对象访问频率及视频服务器带宽差异较大、环境扰动增强的情况下，DBWP和DPB算法可明显降低分布式视频服务器的视频对象访问响应时间。
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| 关 键 词： | 视频点播 分布式视频服务器 动态数据分配 算法 仿真 |
| 文章编号： | 1001-3695(2004)03-0013-03 |
Dynamic Data Allocation Algorithms for Distributed Video Servers |
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| CHEN Jin-cai,ZHANG Jiang-ling,FENG Dan.Dynamic Data Allocation Algorithms for Distributed Video Servers[J].Application Research of Computers,2004,21(3):13-15,22. |
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| Authors: | CHEN Jin-cai ZHANG Jiang-ling FENG Dan |
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| Abstract: | Aimed at distributed video-on-demand systems,3 dynamic data allocation algorithms DRR(Dynamic Round Robin video data allocation),DBWP(Dynamic Bandwidth Weighted Partition video data allocation) and DPB(Dynamic Popularity Based video data allocation) are presented.The simulation results show that:as compared with the algorithms RR,BWP and PB respectively,these 3 algorithms posses good environment adaptability.Especially in the case of the access frequencies of video objects and video server bandwidths are different much more and environment disturbing is increasing,the response time of accessing video objects can be decreased much more by use of DBWP and DPB algorithms. |
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| Keywords: | Video-on-Demand Distributed Video Server Dynamic Data Allocation Algorithm Simulation |
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