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Large-scale P2PVOD system: Focusing on clients

  • Yan Huang
  • Ke XuEmail author
  • HaiTao Li
  • Yang Cao
  • Xin Yao
Research Papers
  • 72 Downloads

Abstract

Using P2P network to provide video on demand (VOD) service can support large-scale users so as to save the bandwidth cost of servers. As VOD must support VCR characters (drag, pause, randomly choosing watching position, etc.), building a large-scale expansion of high-performance VOD system still faces huge challenges. The paper first presents a P2P based reference model, defines the design object, and analyzes the difficulties. And then taking PPLive demand system as an example, it gives client-based solutions, including disk cache-out strategy, memory cache prefetch strategy, maintaining relations between neighbors, task scheduling, data upload strategies and so on. PPLive-demand systems are putting into practice at present with satisfactory fluency and drag delay. The largest number of simultaneous online users is over 210000, and online video data is over 700. Compared with traditional client-server model, the average bandwidth saving rate of servers is 88% or more, and the bandwidth saving rate of user-number’s the peak value can be up to 93%.

Keywords

P2P VOD server bandwidth saving rate fluency drag delay 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Yan Huang
    • 1
  • Ke Xu
    • 2
    Email author
  • HaiTao Li
    • 2
  • Yang Cao
    • 1
  • Xin Yao
    • 1
  1. 1.Shanghai SynaCast Media Tech Co., LtdShanghaiChina
  2. 2.Department of Computer Science & TechnologyTsinghua UniversityBeijingChina

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