Resources https://www.nginx.com/blog/nginx-high-performance-caching/ https://www.digitalocean.com/community/tutorials/understanding-nginx-http-proxying-load-balancing-buffering-and-caching https://www.nginx.com/blog/nginx-caching-guide/ http://www.stevesouders.com/blog/2009/05/12/sharding-dominant-domains/ https://www.scalescale.com/tips/nginx/