Demystifying commercial content delivery networks in China

摘要

Over the past decade, content delivery networks (CDNs) have attracted substantial Internet traffic andrnimproved quality of experience for Internet users. However, the evolution of the Internet ecosystem, whichrnis driven by underlying economic incentives and ever emerging technologies, posts great challenges to thernexisting commercial CDNs (CCDNs). Thoroughly understanding the CDN industry from different aspectsrnincluding market choice, technology, performance, tendency and infrastructure is indispensable to futurernInternet. In this paper, we conduct the first comprehensive study of China’s CDNs using continuous, at-scale,rncontent-driven measurements. Based on the massive amount of measurement data with multidimensionalrnproperties, we demystify the CCDNs in China and answer two important questions: (1) what is the developmentrntrend of CCDNs in China and (2) what are their unique characteristics. The answers to these questionsrnhave significant implications on CDN providers and users.