Paul Buchheit: Then you have what we do with PCs, and that's technically pretty challenging—to take this big network of machines that are unreliable and build a big, reliable storage system out of it.

Paul Buchheit: I'm suddenly reminded that, for a while, I asked people if they were playing Russian Roulette with a gun with a billion barrels (or some huge number, so in other words, some low probability that they would actually be killed), how much would they have to be paid to play one round? A lot of people were almost offended by the question and they'd say, "I wouldn't do it at any price." But, of course, we do that everyday. They drive to work in cars to earn money and they are taking risks all the time, but they don't like to acknowledge that they are taking risks. They want to pretend that everything is risk-free.