From the outside, this nondescript building in Piscataway, New Jersey, looks like a standard corporate office surrounded by lookalike buildings. Even when I walk through the second set of double doors with a visitor badge slung around my neck, it still feels like I'll soon find cubicles, water coolers and light office chatter.

Instead, it's one brightly lit server hall after another, each with slightly different characteristics, but all with one thing in common — a constant humming of power.

The first area I see has white tiled floors and rows of 7-foot-high server racks protected by black metal cages. Inside the cage structure, I feel cool air rushing from the floor toward the servers to prevent overheating. The wind muffles my tour guide's voice and I have to shout over the noise for h

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