| Active | November 6, 2007 |
|---|---|
| Operators | Oak Ridge National Laboratories |
| Operating system | Cray Linux Environment |
| Ranking | TOP500 |
| Sources | top500.org |
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TheCray XT5 is an updated version of theCray XT4supercomputer, launched on November 6, 2007. It includes a faster version of the XT4's SeaStar2 interconnect router calledSeaStar2+, and can be configured either with XT4 compute blades, which have fourdual-coreAMD Opteron processor sockets, or XT5 blades, with eight sockets supporting dual or quad-core Opterons. The XT5 uses a 3-dimensionaltorus network topology.
The XT5 family run theCray Linux Environment, formerly known asUNICOS/lc.[1] This incorporatesSUSE Linux Enterprise Server and Cray'sCompute Node Linux.
TheXT5h (hybrid) variant also includes support forCray X2vector processor blades, and Cray XR1 blades which combine Opterons withFPGA-based Reconfigurable Processor Units (RPUs) provided by DRC Computer Corporation.
TheXT5m variant is a mid-ranged supercomputer with most of the features of the XT5, but having a 2-dimensional torus network topology and scalable to 6 cabinets.
In the fall of 2008, Cray delivered theJaguar 1.3 petaflops XT5 system toNational Center for Computational Sciences atOak Ridge National Laboratory. The system, with over 150,000 processing cores, was the second fastest system in the world for theLINPACK benchmark,[2] the fastest system available for open science and the first system to exceed apetaflops sustained performance on a 64-bit scientific application.[3]
Jaguar underwent an upgrade to 224,256 cores in 2009, after which its performance jumped to 1.75 petaflops, taking it to the number one position in the 34th edition of theTOP500 list in fall 2009.[4] It remained number one in the June 2010 edition,[5] but in October 2010 was surpassed by the ChineseTianhe-1A, which achieved a performance of 2.57 petaflops.[6]
Another XT5 system,Kraken, with 112,896 cores and 1.17 petaflops, as of June 2012 was at position number 21 in theTOP500 list.[7]
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