This Open Compute Project specification focuses, as GigaOM has reported, on moving data center racks from 19-inch to 21-inch widths — the 19-inch requirement being a holdover (believe it or not) from railroad switching equipment. The. Stripping out the excess skinnies down the server size. Normally, today you would have a rack full of servers, up to 40 one-rack-unit pizza-box-style servers right on top of each other. OCP racks can…