BAD HARDWARE WEEK

The problem with checkpointing, according to Fiala, is that as the number of nodes grows, the amount of system overhead needed to do checkpointing grows as well -- and grows at an exponential rate. On a 100,000-node supercomputer, for example, only about 35 percent of the activity will be involved in conducting work. The rest will be taken up by checkpointing and -- should a system fail -- recovery operations, Fiala estimated.
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99% BAD HARDWARE WEEK: Odyssey 2010, Hal says I am perfect well. Well, the problem is not only in fault tolerance but mainly in communication bottlenecks and overheating.Thus only of 3% processing power is sustained the rest is peak computing power !. Modern supercomputers have for their internal use more fiber connections the the whole human world !.