It was time to do an OS upgrade on a webserver I maintain that hosts a couple of reasonably active sites. The two most active sites on the server bring in about 12,000 unique visitors a month, with the two serving up about 4 million hits. Of course this is small potatoes compared to the really big boys, but between the two of them it is pretty much given that there is somebody hitting the server at any given moment and the demographics are such that there is really no reasonable time for the server to be down for any length of time.
