Jaguar (computer)
Jaguar XT5
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| Active | Operational 2005 |
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| Operators | Cray Inc. |
| Location | United States Of America |
| Architecture | 224,256 AMD Opteron processors |
| Operating system | Cray Linux Environment |
| Speed | 1.75 petaflops (peak) |
| Cost | US$104M |
| Ranking | TOP500: 3, June 2011 |
| Web site | http://www.nccs.gov/computing-resources/jaguar/ |
Jaguar was a petascale supercomputer built by Cray at Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. The massively parallel Jaguar had a peak performance of just over 1,750 teraFLOPS (1.75 petaFLOPS). It had 224,256 x86-based AMD Opteron processor cores, and operated with a version of Linux called the Cray Linux Environment. Jaguar was a Cray XT5 system, a development from the Cray XT4 supercomputer.
In both November 2009 and June 2010, TOP500, the semiannual list of the world's top 500 supercomputers, named Jaguar as the world's fastest computer. In late October 2010, the BBC reported that the Chinese supercomputer Tianhe-1A had taken over the top spot, achieving over 2.5 quadrillion calculations per second, thereby bumping Jaguar to second place. The November 2010 TOP500 list confirmed the new rankings.
In 2012 the Cray XT5 Jaguar was upgraded to the Cray XK7 Titan hybrid supercomputing system by adding the Gemini network interconnect and fitting 960 of the nodes with Fermi-based Nvidia GPUs.
The Jaguar system has been through a series of upgrades since installation as a 25-teraFLOPS Cray XT3 in 2005. By early 2008, Jaguar was a 263-teraFLOPS Cray XT4. In 2008, Jaguar was expanded with the addition of a 1.4-petaFLOPS Cray XT5. By 2009, after an upgrade from 2.3 GHz 4-core Barcelona AMD processors to 2.6 GHz 6-core Istanbul AMD processors, the resulting system had over 200,000 processing cores connected internally with Cray's Seastar2+ network. The XT4 and XT5 parts of Jaguar are combined into a single system using an InfiniBand network that links each piece to the Spider file system.
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