图3视频关联度较小时查找视频源节点的百分比 实验对服务器的带宽消耗也进行了比较,对比了 FastSearch、NetTube和C/S架构时视频服务器的带宽消耗。图4中可以看到C/S架构的带宽消耗最大,在同样数量的用户点播请求下
图3视频关联度较小时查找视频源节点的百分比
实验对服务器的带宽消耗也进行了比较,对比了
FastSearch、NetTube和C/S架构时视频服务器的带宽消耗。图4中可以看到C/S架构的带宽消耗最大,在同样数量的用户点播请求下达到了接近4Gbps。FastSearch比NetTube有了更好的改善,能够节约75%的带宽消耗,这是通过进一步增加节点间的数据共享实现的。
图片
图4视频服务器的带宽消耗对比
4结语
本文提出了一种基于P2P的在线视频资源查找策略,该策略在前后两次点播的视频资源的关联关系较小的时候仍然可以通过较小的资源开销获得较大的资源查找效率。通过实验仿真表明了FastSearch比现有的系统在资源查找效率上具有更优的效率。下一步,将继续通过在现实系统中部署FastSearch策略并进一步对系统加以完善。
参考文献:[1]
GILL P, ARLITT M, LI Z, et al. YouTube traffic characterization:A view from the edge[C]// IMC07: Proceedings of the 7th ACM SIGCOMM Conference on Internet Measurement. New York: ACM,2007:15-28.
[2]
CORBETT C. Peering of video[EB/OL]. [2006-09-10] http://www.nanog.org/mtg.0606/pdf/bill.norton.3.pdf.
[3]
ZHANG XINYAN, LIU JIANGCHUAN, LI BO, et al. CoolStreaming/DONet: A data.driven overlay network for peer.to.peer live media streaming[EB/OL].[2011-04-01].http://www.cs.sfu.ca/~jcliu/Papers/CoolStreaming.pdf.
[4]
YAN HUANG, FU T Z J, CHIU D.M,et al. Challenges, design and analysis of a large.scale P2P.VoD system[C]// SIGCOMM’08: Proceedings of the ACM SIGCOMM 2008 Conference on Data Communication. New York: ACM,2008:375-388.
[5]
CHENG XU, LIU JIANCHUN. NetTube: Exploring social networks for peer.to.peer short video sharing[C]// Proceedings of the 28th IEEE Conference on Computer Communications. [S.l.]: IEEE, 2009: 1152-1160.
[6]
HUANG CHENG, LI JIN, ROSS K W. Can Internet video.on.demand be profitable?[C]// SIGCOMM07: Proceedings of the 2007 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communications. New York: ACM, 2007:133-144.
[7]
BAUMGART I, HEEP B, KRAUSE S. OverSim: A scalable and flexible overlay framework for simulation and real network applications[EB/OL].[2011-09-01].http://www.tm.uka.de/doc/p2p09_oversim.pdf.
[8]
XU K, LI HAITAO, LIU JIANGCHUAN,et al. PPVA: A universal and transparent peer.to.peer accelerator for interactive online video sharing[C]// IWQoS10: 18th International Workshop on Quality of Service. [S.l.]: IEEE, 2010:1-9.
[9]
Euclidean distance[EB/OL].[2011-03-09]. http://en.wikipedia.org/wiki/Euclidean_distance.
[10]
CHA M, KWAK H, RODRIGUEZ P. I Tube, You Tube, Everybody Tubes: Analyzing the world’s largest user generated content video system[C]// IMC07: Proceedings of the 7th ACM SIGCOMM Conference on Internet Measurement. New York: ACM, 2007:1-14.
[11]
HUI K Y K, LUI J C S, YAU D K Y. Small.world overlay P2P networks: Construction and handling dynamic flash crowd[J]. Computer Networks, 2006,50(15):212-221.
[12]
BAUMGART I, HEEP B, KRAUSE S. A P2PSIP demonstrator powered by OverSim[C]// P2P’07: Proceedings of the Seventh IEEE International Conference on Peer.to.Peer Computing. Washington, DC: IEEE Computer Society, 2007:243-244.
(责任编辑:南粤论文中心)转贴于南粤论文中心: http://www.nylw.net(南粤论文中心__代写代发论文_毕业论文带写_广州职称论文代发_广州论文网)
顶一下
(0)
0%
踩一下
(0)
0%
版权声明:因本文均来自于网络,如果有版权方面侵犯,请及时联系本站删除.