CDN DNS - An Efficient DNS Request Routing Technique in Content Delivery Networks

摘要

We present a new DNS based request routing technique in CDNs to decrease delay - Round Trip Time (RTT), throughput, and packet loss. The existing DNS Request Routing only emphasizes the domain name resolution with the web server IP address. It does not consider location of the client, type of the content to select the server. To solve the above problem, this paper puts forward a modified DNS requet routing technique for CDNs based upon client location and type of the content to select the appropriate CDN server or surrogate. Further this technique reduce one cycle of request routing by forwarding client request directly to CDN server instead of sending back resolved IP address to the client.