分布式VOD系统资源部署的研究

Research on the Resource Allocation of Distributed VOD System

以省网为单位的广电网络运营商在VOD系统建设过程中,基本都采用分布式部署方式来建设VOD系统。在建设过程中由于成本及部署的合理性原因,网络运营商极其关注传输带宽的分配、存储服务器与推流服务器的部署及CDN缓存网络的建设。通过结合幂律分布与帕累托分布,对VOD系统建设过程中主要参数进行建模,明确了边缘存储大小与覆盖用户户数的数学关系。

Almost every Broadcast and Television network operator selected a distributed system when building a VOD platform.For the reason of considering the cost and reasonable of the deployment of the equipment,all of the operators show great concern for the allocation of the transfer bandwidth,the deployment of the storage and streaming server,and the building of the CDN network.In this paper,we present a method to illustrate the relationship between storage capacity of the replica and the number of the users,by combining the Power Laws and Pareto Distribution.