supercomputers – Tech Today w/ Ken May

Ditching RAM may lead to low-cost supercomputers

Many servers , supercomputers and other monster systems thrive on high-speed RAM to keep things running smoothly, but this memory is wildly expensive — and that limits not just the number of nodes in these clusters, but who can use them. MIT researchers may have a much more affordable approach in the future, though. They’ve built a server network (not shown here) that drops RAM in favor of cheaper and slower flash storage, yet performs just about as well. The key was to get the flash drives themselves (or specifically, their controllers) to pre-process some of the data, instead of making the CPUs do all the hard work. That doesn’t completely close the speed gap, but the differences are virtually negligible. In one test, 20 servers with 20TB of flash were about as fast as 40 servers with 10TB of RAM. This doesn’t mean that flash-centric computing will be useful absolutely everywhere. MIT has only demonstrated its technique helping out with database-heavy tasks like ranking web pages. This wouldn’t necessarily help much with tasks that depend more on calculations, and the networked design means it this RAM-less approach wouldn’t do much to help your home PC. All the same, this could help a lot if it lets your favorite cloud service run faster, or helps cost-conscious scientists devote money toward other projects. [Image credit: AP Photo/Jens Meyer] Filed under: Storage , Science Comments Source: MIT News

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Ditching RAM may lead to low-cost supercomputers

The ten fastest supercomputers on the planet, in pictures

A Chinese supercomputer known as Tianhe-2 was today named the world’s fastest machine, nearly doubling the previous speed record with its performance of 33.86 petaflops. Tianhe-2’s ascendance was revealed in advance and was made official today with the release of the new Top 500 supercomputer list . Tianhe-2 was developed at China’s National University of Defense Technology and will be deployed in the country’s National Supercomputing Center before the end of this year. “The surprise appearance of Tianhe-2, two years ahead of the expected deployment, marks China’s first return to the No. 1 position since November 2010, when Tianhe-1A was the top system,” the Top 500 announcement states. “Tianhe-2 has 16,000 nodes, each with two Intel Xeon Ivy Bridge processors and three Xeon Phi processors for a combined total of 3,120,000 computing cores.” The combined performance of the 500 systems on the list is 223 petaflops, up from 162 petaflops in the previous list released six months ago. A petaflop represents one quadrillion floating point operations per second, or a million billion. Read 3 remaining paragraphs | Comments

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The ten fastest supercomputers on the planet, in pictures

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