Introduction Whilst helping a customer set up their Exalytics server the other day I hit an interesting problem. Not interesting as in hey-this-will-cure-cancer, or oooh-big-data-buzzword interesting, or even interesting as in someone-has-had-a-baby [https://twitter.com/andybolton/status/359568006545809408/photo/1], but nonetheless, interesting if you like learning about the internals