1sockchuck writes: As Google showed the world its data centers this week, it disclosed one of its best-kept secrets: how it cools its custom servers in high-density racks. All the magic happens in enclosed hot aisles, including supercomputer-style steel tubing that transports water — sometimes within inches of the servers. How many of those servers are there? Google has deployed at least 1 million servers, according to Wired, which got a look inside the company's North Carolina data center. The disclosures accompany a gallery of striking photos by architecture photographer Connie Zhou, who discusses the experience and her approach to the unique assignment.