As our video catalog increases, so do our delivery costs, distribution complexity, incident mitigation challenges, etc. We developed a system Adaptive Traffic Routing (ATR) for addressing the various traffic routing needs. Codenamed Panama, the system is designed to balance the competing goals of

1. High Quality of Service for end users (always the top priority) 2. Cost of CDN usage, particular when accounting for award tier pricing 3. Stabilize traffic to all CDNs, especially those running internally or which are particularly sensitive to traffic spikes 4. Minimize the cognitive load on our operators who are trying to accomplish all of the above. Panama works by ingesting data from multiple sources, analyzing them, and creating a new set of rules for how to route users to CDN endpoints. Panama generates these rules every minute and feeds them to a service at the edge which assigns user requests to specific CDN endpoints. Since these rules are static and precompiled, they provide extremely high performance and scalability. We strive to address all of the above concerns through our ingest data and our compilation algorithms. This project has been highly focused on utilizing the data feedback to make the streaming experience more positive for everyone involved. This talk was presented at Demuxed ’22, a conference for video nerds in San Francisco featuring amazing talks like this one. Demuxed ’22 was made possible by sponsors like our Platinum sponsor Daily (https://daily.co) and organized by people from Mux (https://mux.com). For more information about the conference and community, see https://2022.demuxed.com.