Just a follow up to your 95 percentile rule, there is a famous story of Google exploiting this (in the early days before they were flush with money) in order to

Just a follow up to your 95 percentile rule, there is a famous story of Google exploiting this (in the early days before they were flush with money) in order to transfer their data to a new data center on the opposite coast. http://www.dodgycoder.net/2013/02/googles-fiber-leeching-caper.html http://www.dodgycoder.net/2013/02/googles-fiber-leeching-cap...