Modeling and evaluation of client access in CDN cloud

Content delivery network (CDN) is a new kind of Internet content service system, which is built based on IP network and can provide the content distribution and service to satisfy the requirement of content access and application efficiency, the requirement of quality and contents order. Meanwhile, Cloud computing is now widely used because it can process a large amount of information, and has a very high scalability. In this paper, a high level modeling language — Performance Evaluation Process Algebra (PEPA), it is adopted to model the process of clients access in CDN cloud. Meanwhile, the fluid flow approximation is used to analyze the performance through the PEPA model, thus the maximum utilization and throughput of the system can be obtained.