IBM has a challenger in the race to deliver the world's fastest Linux-based supercomputer. A day after the U.S. company said it had received an order for what stands to be the fastest such machine, Japan's Fujitsu has announced an order for a faster machine that it expects to put into service at about the same time. "The Fujitsu computing cluster will contain 2,048 as-yet-unidentified processors and stands to deliver a peak performance of 12.4 trillion FLOPS (floating point operations per second), the company said in a statement on Thursday."

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