首页> 外文会议>Conference on Multimedia Systems and Applications VI; Sep 8-9, 2003; Orlando, Florida, USA >Design Issues on Media Server Scheduling for Video-on-Demand (VoD) Services
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Design Issues on Media Server Scheduling for Video-on-Demand (VoD) Services

机译:视频点播(VoD)服务的媒体服务器计划中的设计问题

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Media server scheduling in video-on-demand (VOD) systems includes video content allocation and request migration among servers. In this paper, we present a greedy algorithm to allocate video copies to media servers. It uses a graph model and minimizes the average shortest distance among media servers at each step. To facilitate the performance analysis of the random early migration (REM) algorithm proposed in our previous work, we introduce a formal description of the media service. Based on this system formalization, we develop a state transition method to study the parameter effect on the REM performance and compare the real time performance between REM and traditional migration with early start (TMES). The analytical result shows that REM introduces smoother migrations between media servers and thus leads to less real time system load than TMES.
机译:视频点播(VOD)系统中的媒体服务器调度包括视频内容分配和服务器之间的请求迁移。在本文中,我们提出了一种贪婪算法来将视频副本分配给媒体服务器。它使用图形模型,并在每个步骤中最小化了媒体服务器之间的平均最短距离。为了便于对先前工作中提出的随机早期迁移(REM)算法进行性能分析,我们引入了媒体服务的正式描述。在此系统形式化的基础上,我们开发了一种状态转移方法,以研究参数对REM性能的影响,并比较REM和传统迁移与早期启动(TMES)之间的实时性能。分析结果表明,REM引入了媒体服务器之间更平滑的迁移,因此与TMES相比,它减少了实时系统负载。

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