计算机应用 ›› 2010, Vol. 30 ›› Issue (3): 765-767.

• 网络与通信 • 上一篇    下一篇

基于统计学模型的VOD负载均衡设计

白雪,彭德巍   

  1. 武汉理工大学计算机科学与技术学院
  • 收稿日期:2009-09-08 修回日期:2009-10-31 发布日期:2010-03-14 出版日期:2010-03-01
  • 通讯作者: 白雪

Load balancing design based on statistical model for VOD

  • Received:2009-09-08 Revised:2009-10-31 Online:2010-03-14 Published:2010-03-01
  • Contact: BAI Xue

摘要: 现有的负载均衡算法大都基于Web服务,并不适用于视频点播(VOD)。而基于VOD的负载均衡算法没有考虑用户操作以及一个节目不同片段的访问概率差异等因素对系统负载的影响。因此,设计一种基于统计学模型的负载均衡设计方法,从用户的随机性操作出发,统计分析其规律,根据不同节目不同片段的不同点播率对片源进行分块备份存储。通过仿真实验证实了算法较其他算法的优越性,提高了各节点服务器资源利用率,达到了负载均衡的目的。

关键词: 负载均衡, 视频点播, 统计模型, 用户操作

Abstract: Most load balancing algorithms are based on Web service and unfit for Video on Demand (VOD) system. They all neglect the effect of user's behavior and the differences among different segments in one program. Therefore, the load balancing algorithm based on statistical models was proposed. It commenced from random user behavior, analyzed the implied rules, divided the programs into pieces, copied and stored them, according to different order probability of diverse segments in diverse programs. The results of simulation testify its superiority to other algorithms. It improves the utilization rate of server resource and achieves load balance.

Key words: load balance, Video on Demand(VoD), statistical model, user operation