| 集群式VoD系统中文件分块存储策略 |
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| 引用本文： | 王飞,奚宏生,杨坚.集群式VoD系统中文件分块存储策略[J].计算机工程,2008,34(21):213-215. |
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| 作者姓名： | 王飞 奚宏生 杨坚 |
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| 作者单位： | 中国科学技术大学网络传播系统与控制联合实验室,合肥,230027;网络传播系统与控制安徽省重点实验室,合肥,230027 |
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| 基金项目： | 国家"863"计划基金资助项目，安徽省自然科学基金资助项目 |
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| 摘 要： | 在VoD点播中，用户主动中断点播会造成影片不同时间段的部分被访问的概率不同，给传统的分块策略带来了负载不均衡问题。该文分析用户在VoD点播时中断点播的行为模式，在此基础上建立分析点播中断概率的模型，提出一种改进的分块存储策略。仿真表明，改进的策略能够更好地实现负载均衡，提高系统运行效率。
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| 关 键 词： | 视频点播 集群系统 数据存储 负载均衡 |
| 修稿时间： | |
Optimized File-blocking Storage Scheme in Clustered VoD System |
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| WANG Fei,XI Hong-sheng,YANG Jian.Optimized File-blocking Storage Scheme in Clustered VoD System[J].Computer Engineering,2008,34(21):213-215. |
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| Authors: | WANG Fei XI Hong-sheng YANG Jian |
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| Affiliation: | (1. Joint Lab of Network Communication System and Control, University of Science and Technology of China, Hefei 230027; 2. Anhui Key Lab of Network Communication System and Control, University of Science and Technology of China, Hefei 230027) |
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| Abstract: | As Video-on-Demand(VoD) users may stop watching in the middle of a movie,so different parts of the same movie have different playback probabilities,which cause potential load unbalance problem for traditional segment based storage scheme.This paper analyzes the user's behavior pattern statistically and proposes a probability model to describe it.According to the model,it proposes an improved segment based storage scheme,and demonstrates its advantages in better load balance and system efficiency through sim... |
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| Keywords: | Video-on-Demand (VoD) clustered system data storage load balance |
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