Modeling of request routing management on router for content delivery network

Abstract

Abstract: A large amount of Internet traffic is organized through content delivery networks (CDNs). CDNs improve Internet access in terms of the response time and system throughput by mapping end-users to the nearest servers based on their locality, which known as request routing (RR). Most CDN systems use domain name servers (DNS) to redirect clients by issuing the IP address of the nearest server. Owing to the fact that DNS records have an expiration time (TTL), clients frequently have to contact name servers to update their IP addresses, which increases the connection delay. On the other hand, clients are demanding faster Internet connections. Because routers will be able to provide services in future networks, router-based RR has been proposed. In this paper, we study an analytical model of router-based RR. We present its architecture design and implementation, and show how router-based RR can be used to effectively redirect a clients’ request. Numerical analysis results demonstrate the effectiveness of router-based RR, which shows a 64.4% reduction of the response time for a client redirection.