Evolution of GitHub's data centers
https://githubengineering.com/evolution-of-our-data-centers/ [githubengineering.com]
2017-10-13 02:48
We’ve got four facilities, two of which are transit hotels which we call points of presence (POPs) and two of which are data centers.
Also: https://githubengineering.com/transit-and-peering-how-your-requests-reach-github/
Also: https://githubengineering.com/mitigating-replication-lag-and-reducing-read-load-with-freno/