Cray XK7
Active | October 29, 2012 |
---|---|
Operators | petaFLOPS |
Ranking | TOP500 |
Website | www |
XK7 is a
Overview
XK7 is scalable up to 500 cabinets, each contains 24
XK7 based machines run the
Usage
The XK7 platform was announced on October 29, 2012 to coincide with the completion of Titan at Oak Ridge National Laboratory (ORNL).[5] Titan has 18,688 XK7 nodes, each containing an Opteron 6274 CPU with 32 GB of memory and a K20X GPU with 6 GB.[6] The computer has a theoretical peak performance of 27.1 petaFLOPS but in the LINPACK benchmark used by the TOP500 organisation to rank supercomputers it performed at 17.59 petaFLOPS, enough to take first place on the November 2012 list.[7][8] Titan uses 8.2 MW of electricity and is third on the Green500 list which ranks supercomputers by their energy efficiency.[9]
The National Center for Supercomputing Applications (NCSA) in Illinois has a machine, Blue Waters, using a combination of Cray XE6 and XK7 nodes. The machine has 3072 XK7 nodes and 22,752 XE6 nodes.[10] Each XE6 node has two Opteron 6276 and 32 GB of memory per CPU.[11] The XK7 nodes also have Opteron 6276 CPUs with 32 GB of memory and a K20X GPU with 6 GB.[11] Blue Waters has performed at over 1 petaFLOPS in benchmarks; however, the project managers do not believe in the relevance of the LINPACK benchmark used by the TOP500 organisation and therefore did not submit a benchmark test for ranking.[10]
The Swiss National Supercomputing Centre (CSCS) machine named Todi was upgraded to XK7 on October 22, 2012.[12] Todi has 272 nodes with Opteron 6272 CPUs with 32 GB of memory and a K20X GPU with 6 GB.[13][14] Todi has a theoretical peak performance of 393 teraFLOPS and performed at 274 teraFLOPS in the November 2012 TOP500 list taking 91st place.[14] Todi consumes 122 kW and is ranked fourth, one behind Titan, on the November 2012 Green500 list.[9][14]
References
- ^ Schulten, Klaus (November 29, 2012). "Blue Waters petascale supercomputer now in friendly user phase". Outlook Series. Retrieved January 16, 2013.
- ^ a b c d e f "Cray XK7 Specifications". Cray. Archived from the original on January 6, 2013. Retrieved January 15, 2013.
- ^ "Introduction to OpenACC and CUDA Programming on the Cray XK7 Platform". Swiss National Supercomputing Centre. January 10, 2013. Retrieved January 15, 2013.
- ^ Gajus, Brian (December 17, 2012). "Titan Trainers Take Road Trip". Oak Ridge Leadership Computing Facility. Retrieved January 16, 2013.
- ^ "Cray Launches XK7 Hybrid Super with Titan Debut at ORNL". Inside HPC. October 29, 2012. Retrieved January 15, 2013.
- ^ "Introducing Titan". Oak Ridge Leadership Computing Facility. Retrieved January 16, 2013.
- ^ Gajus, Brian (November 12, 2012). "ORNL Supercomputer Named World's Most Powerful". Oak Ridge Leadership Computing Facility. Retrieved January 16, 2013.
- ^ "November 2012". TOP500. Retrieved January 15, 2013.
- ^ a b "Heterogeneous Systems Re-Claim Green500 List Dominance". Green500. November 14, 2012. Archived from the original on February 5, 2013. Retrieved January 16, 2013.
- ^ a b "One Year Later: Delivering Sustained Petascale Science" (PDF). National Center for Supercomputing Applications. December 2012. Archived from the original (PDF) on January 25, 2013. Retrieved January 16, 2013.
- ^ a b "Brief Blue Waters System Summary". National Center for Supercomputing Applications. Retrieved January 16, 2013.
- ^ "Todi Upgrade to Xk7". Swiss National Supercomputing Centre. October 15, 2012. Archived from the original on February 19, 2013. Retrieved January 16, 2013.
- ^ "Todi Cray XK7". Swiss National Supercomputing Centre. Archived from the original on January 21, 2013. Retrieved January 16, 2013.
- ^ a b c "Todi". TOP500. Retrieved January 16, 2013.