Jaguar (computer)

Jaguar (computer)

Jaguar XT5
Active	Operational 2005
Operators	Cray
Location	Oak Ridge National Laboratory
Architecture	224,256 AMD Opteron processors
Speed	1.75 petaflops (peak)
Cost	USD $104M[1]
Ranking	TOP500: 3, June 2011
Web site	http://www.nccs.gov/computing-resources/jaguar/

Jaguar is a petascale supercomputer built by Cray at Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. The massively parallel Jaguar has a peak performance of just over 1,750 teraflops (1.75 petaflops). It has 224,256 x86-based AMD Opteron processor cores,^[2] and operates with a version of Linux called the Cray Linux Environment.^[3] Jaguar is a Cray XT5 system, a development from the Cray XT4 supercomputer.

In 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.^[4][5]

Development

The Jaguar system has been through a series of upgrades since installation as a 25-teraflop Cray XT3 in 2005. By early 2008, Jaguar was a 263-teraflop Cray XT4. In 2008, Jaguar was expanded with the addition of a 1.4-petaflop Cray XT5. By 2009, 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.

Jaguar's XT5 partition contains 18,688 compute nodes in addition to dedicated login/service nodes. Each XT5 compute node contains dual hex-core AMD Opteron 2435 (Istanbul) processors and 16 GB of memory. Jaguar's XT4 partition contains 7,832 compute nodes in addition to dedicated login/service nodes. Each XT4 compute node contains a quad-core AMD Opteron 1354 (Budapest) processor and 8 GB of memory. Total combined memory amounts to over 360 terabytes (TB).^[6]

Jaguar uses an external Lustre file system called Spider^[7] for all file storage. The file system read/write benchmark is 240 GB/s, and provides over 10 petabytes (PB) of storage.^[8]

Hundreds of applications have been ported to run on the Cray XT series, many of which have been scaled up to run on 20,000 to 150,000 processor cores.^[9]

The petaflop Jaguar seeks to address some of the most challenging scientific problems in areas such as climate modeling, renewable energy, materials science, seismology, chemistry, astrophysics, fusion, and combustion. Annually, 80% of Jaguar's resources are allocated through DOE's Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program, a competitively-selected, peer-reviewed process open to researchers from universities, industry, government, and non-profit organizations.

See also

	Computer Science portal
	Information technology portal

• Computer science
• Computing

References

1. ^ http://blogs.knoxnews.com/munger/2009/01/ornl_officially_accepts_cray_x.html
2. ^ "Jaguar", NCCS, http://www.nccs.gov/computing-resources/jaguar/#XT5-6-Core-Upgrade, retrieved November 25, 2009 
3. ^ "Jaguar", TOP500, http://www.top500.org/system/10184, retrieved November 20, 2009 
4. ^ "China claims supercomputer crown". BBC News Online. 28 October 2010. http://www.bbc.co.uk/news/technology-11644252. Retrieved October 29, 2010. 
5. ^ "China Grabs Supercomputing Leadership Spot in Latest Ranking of World's Top 500 Supercomputers". TOP500. 11 November 2010. http://www.top500.org/lists/2010/11/press-release. Retrieved December 5, 2010. 
6. ^ "Jaguar System", NCCS, http://www.nccs.gov/computing-resources/jaguar/, retrieved July 3, 2010 
7. ^ Spider Up and Spinning Connections to All Computing Platforms at ORNL
8. ^ "Jaguar: The World's Most Powerful Computer", Bland, et al, (paper presented at CUG 2009, ORNL)., http://www.nccs.gov/wp-content/uploads/2010/01/Bland-Jaguar-Paper.pdf 
9. ^ ibid 

External Links

• For more detailed information on Jaguar, see Jaguar: The World's Most Powerful Computer

Records
Preceded by IBM Roadrunner 1.7 petaflops	World's most powerful supercomputer November 2009 – October 2010	Succeeded by Tianhe-1A 2.57 petaflops