End-User Mapping: Next Generation Request Routing for Content Delivery

摘要: Content Delivery Networks (CDNs) deliver much of the world's web, video, and application content on Internet today. A key component a CDN is mapping system that uses DNS protocol to route each client's request ``proximal'' server serves requested content. While traditional systems identify client using IP its name server, we describe our experience in building rolling-out novel called end-user identifies directly by prefix address. Using measurements from Akamai's production network during roll-out, show provides significant performance benefits for clients who use public resolvers, including an eight-fold decrease distance, two-fold RTT download time, 30% improvement time-to-first byte. We also quantify scaling challenges implementing such as 8-fold increase queries. Finally, with larger number deployment locations likely benefit more than smaller deployments.