基于Anycast的分布式互联网电视CDN调度系统研究

Research on Distributed Internet TV CDN Scheduling System Based on Anycast

现有的互联网电视内容分发网络(CDN)调度系统采用集中部署架构,存在单点隐患和易出现容量瓶颈的缺陷。文章采用分布式架构部署CDN调度系统,基于任播协议(Anycast)技术将CDN调度系统下沉到各个区域(如地市、区县),用户请求会由分布式CDN调度系统中距离用户最近的区域调度节点接收并响应,同时区域调度节点出现故障时由中心调度节点服务,提高了CDN调度系统的整体安全性,扩大了系统总容量,降低了用户调度请求响应的时延,有效避免了因调度故障而导致的大范围互联网电视视频资源无法播放的情况。

The existing Internet TV content distribution network(CDN)scheduling system adopts a centralized deployment architecture,which has the defects of single-point hidden danger and easy capacity bottlenecks.This article uses a distributed architecture to deploy the CDN scheduling system.Based on the Anycast technology,the CDN scheduling system is submerged in various areas(such as cities,districts and counties).User requests will be made by the distributed CDN scheduling system closest to the user The regional scheduling node receives and responds,and the central scheduling node serves when the regional scheduling node fails,which improves the overall security of the CDN scheduling system,expands the total system capacity,reduces the time delay of user scheduling request response,and effectively avoids causes A situation where a wide range of Internet TV video resources cannot be played due to scheduling failures.