Dropbox traffic infrastructure: Edge network

This post details Dropbox's Edge network infrastructure, including its points of presence (PoPs) around the world, Global Server Load Balancing (GSLB) strategies (BGP anycast and GeoDNS), and the rationale behind building their own Edge network to improve latency and file transfer performance. It discusses PoP location selection algorithms, the challenges and benefits of anycast, and the tools used for troubleshooting. The post also touches upon the evolution of their GSLB from anycast to GeoDNS for better traffic steering and graceful drain capabilities.