A few years ago, I had a series of meetings with CIOs and CTOs in New York City. I asked them all the same question: "Do you feel the grid you're building is delivering a competitive advantage to your business?" (When we talk about a computer grid, we ordinarily mean a private collection of low-cost network, storage, computing, and software elements, lashed together to do complicated computing work that historically required multimillion-dollar data centers.)

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