Intelligent DNS based load balancing at Dropbox
https://blogs.dropbox.com/tech/2020/01/intelligent-dns-based-load-balancing-at-dropbox/

Enhancing Bandaid load balancing at Dropbox by leveraging real-time backend server load information
https://blogs.dropbox.com/tech/2019/09/enhancing-bandaid-load-balancing-at-dropbox-by-leveraging-real-time-backend-server-load-information/

Rethinking Netflix’s Edge Load Balancing
https://netflixtechblog.com/netflix-edge-load-balancing-695308b5548c

Давайте уже разберемся в DNS
https://habr.com/ru/post/303446/