基于HDFS实现面向OTT的CDN系统  

Implementation of CDN for OTT based on HDFS

作　　者：李晓峰[1,2] 朱新博 刘永辉[2] 勾红领 LI Xiaofeng;ZHU Xinbo;LIU Yonghui;GOU Hongling(Institute of Digital Home and Cloud Computing, School of Computer Science and Technology, Shandong Jianzhu University, Jinan 250101, China;Department of Digital Media, Inspur Software Group, Jinan 250101, China)

机构地区：[1]山东建筑大学计算机科学与技术学院数字家庭与云计算研究所,山东济南250101 [2]浪潮软件集团数字媒体事业部,山东济南250101

出　　处：《电视技术》2017年第11期101-104,140,共5页Video Engineering

基　　金：工信部2012年电子信息发展基金项目(十万户级数字家庭应用示范工程)

摘　　要：为了在省级广电网络上提供普遍的视频点播服务,采用OTT技术构造开放视频服务系统,以降低复杂性和建设成本。针对OTT的节目分片特征,研究了其对CDN的需求。然后分析了Hadoop中HDFS的数据分块冗余存储、面向读优化、可扩展等特性,提出了利用HDFS实现OTT的CDN的方案。据此设计了具体的CDN技术方案,在具体项目中应用,获得了良好效果。In order to provide the mass VOD service in the province＇s interactive television networks,an open video service system was designed based on OTT technology with lower complexity and lower cost.The OTI＇s requirements for CDN were studied according to the data being stored in the segmented files,and the features of Hadoop＇s HDFS were analyzed,such as storing in blocks redundantly,optimizing for reading and scalability.So it was put forward that utilizing HDFS to build OTI＇s CDN.Then a CDN implementation was designed,which was applied with excellent performance.

关 键 词：视频点播 CDN OTT HDFS HADOOP 

分 类 号：TN949.291[电子电信—信号与信息处理] TP39[电子电信—信息与通信工程]