Sonar is the system we use to measure latency from the client devices to all of our PoPs.
Cartographer is the system that consumes all of these sonar measurements and uses several other real time data sources (BGP routes, Link capacity, PoP health, PoP capacity, etc) and continually generates a GLB map for the most optimal targetting of requests to our PoPs.
Hi All! Thanks for the comments here. The video for this same (more recent) talk at SRECon Europe 2015 is up and it is much higher quality. I have iterated on the presentation with feedback I got since giving this in February. Enjoy!
Cartographer is the system that consumes all of these sonar measurements and uses several other real time data sources (BGP routes, Link capacity, PoP health, PoP capacity, etc) and continually generates a GLB map for the most optimal targetting of requests to our PoPs.