Apparently HackerNews used to run from a single application server + Cloudflare caching, but later moved away from Cloudflare. Unsure how many web servers it runs on now. [0]
In 2016, Stack Overflow ran on 11 IIS web servers, but they really only needed 1.
In 2016, Stack Overflow ran on 11 IIS web servers, but they really only needed 1.
[0] https://news.ycombinator.com/item?id=18496344
[1] https://nickcraver.com/blog/2016/02/17/stack-overflow-the-ar...