I had the opportunity to attend Google’s Data Center Efficiency Summit. During the summit, Google took some of the mystery of their data center operations. In addition to a number of presenters, Google displayed one of their custom server models. It is an interesting approach where the server itself holds the battery that provides redundancy.
Videos and presentations from the Google Data Center Efficiency Summit have been posted to YouTube. Here are links to them:
Google Container Data Center Tour
Google Data Center Water Treatment Plant