Cray XT4/XT3関連メモ IV [07/05/13 --]

[07/05/26]
"Peter Ungaro Talks Up Cray-o-wulf at LCI Conference", May 25, 2007, HPCwire
　http://www.hpcwire.com/hpc/1580681.html
""Cray's design is based on the premise that pure commodity clusters begin to break down in a number of ways after about 1,000 processors," said Ungaro. "Beowulf commodity clusters did a great job of getting us a low-cost solution to scale past what we could do with SMP technologies, getting us from hundreds of processors upwards of 1,000. But above the 1,000 processor limit, the pure commodity approach breaks down and does not provide productive, operational or maintainable systems.""
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Seymour Cray Documentary, Of The Universe, LLC
　http://oftheuniverse.com/projects.html
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"HECToR Maintains UK’s Strong Research Role", May 2007, Scientific Computing
　http://www.scimag.com/ShowPR~PUBCODE~030~ACCT~3000000100~ISSUE~0705~RELTYPE~FE~PRODCODE~00001669~PRODLETT~Y.html

High End Computing Terascale Resources (HECToR), 2007-03-01
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[07/05/16]
ISC Award Winning Paper:
"An Evaluation of the Impacts of Network Bandwidth and Dual-Core Processors on Scalability",
　Ron Brightwell, Keith D. Underwood, Courtenay Vaughan, Sandia National Laboratories, USA
　http://www.supercomp.de/isc2007/index.php5?s=conference&s_nav=speaker&speaker_id=1443
"This paper provides a analysis of the impact of this upgrade on the performance of several applications and micro-benchmarks. We show scaling results for applications out to thousands of processors and include an analysis of the impact of using dual-core processors on this system."

ISC'07 Scientific Day
　http://www.supercomp.de/isc2007/index.php5?s=conference&s_nav=scientific_day
"With the Scientific Day (Tuesday, June 26, 2007) ISC’07 provides an open forum for engineers and scientists in academia, industry, and government to present and discuss issues, directions, and results that will shape the future of high performance computing and networking."

International Supercomputing Conference ISC'07: June 26-29, 2007
　http://www.supercomp.de/isc2007/


Ron Brightwell, Principal Member of Technical Staff
Scalable Computing Systems, Sandia National Laboratories
　http://www.cs.sandia.gov/~rbbrigh/
何度も紹介していると思います。
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[07/05/12]
"PSC Provides Major Support for Unprecedented NOAA and University of Oklahoma Storm-Forecast Experiment", May 10, 2007
　http://www.psc.edu/publicinfo/news/2007/2007-05-10-storm.php
"To that end, NOAA (the National Oceanic and Atmospheric Administration) this spring has mounted an unprecedented experiment in forecasting severe storms. To support it the Pittsburgh Supercomputing Center (PSC) has brought to bear an awesome array of technology, its Cray XT3 - a lead system of the National Science Foundation (NSF) TeraGrid - and a dedicated high-bandwidth network link between Pittsburgh and Oklahoma contributed by Cisco Systems, Inc."

"To implement CAPS' daily forecast runs on PSC's Cray XT3 using the WRF (Weather Research and Forecast) model, PSC provided technological and staff assistance at several levels:"
いくつもありますが
・"This dedicated link - from the Cray XT3 to OneNet in Tulsa to a supercomputer at the University of Oklahoma (which ingests and post-processes the data) - makes possible the transfer of 2.6 terabytes of data per forecast day."
・"PSC staff optimized the latest version of the WRF model to run on the Cray XT3, gaining a threefold speedup in input/output (I/O) of the WRF code, substantially improving overall performance."
・"PSC also optimized the I/O for post-processing routines used to visualize and analyze the forecast output, achieving 100-fold speedup."
・"PSC modified the reservation and job-processing logic of its job-scheduling software to implement auto-scheduling of WRF runs and related post-processing, 760 separate jobs each day, demonstrating the TeraGrid's ability to use the Cray XT3, a very large "capability" resource, on a scheduled, real-time basis."

Rolling Thunder Preview (Projects in Scientific Computing 2005)
　http://www.psc.edu/science/2005/storms/

NOAA Storm Prediction Center (SPC)
　http://www.spc.noaa.gov/
Center for Analysis and Prediction of Storms (CAPS) at the University of Oklahoma
　http://www.caps.ou.edu/
The Weather Research and Forecasting (WRF) Model
　http://www.wrf-model.org/index.php
　たしか、どこかのサイトの HPC導入ベンチマークにあった記憶が
Linked Environments for Atmospheric Discovery (LEAD)
　https://portal.leadproject.org/gridsphere/gridsphere
National Lambda Rail (NLR)
　http://www.nlr.net/
なんだかすごいプロジェクト


偶然見つけた面白そうな記事：
"米国の天気予報が衝撃的に変わる！", 07/15/06, 事典ドットコム
　http://www.jiten.com/index.php?itemid=4135
"米国のGAO(General Accounting Office/米国連邦会計監査院)は2006年7月14日に、National Weather Serviceが計画している、まだ知られていない衝撃的な天気予報の変化に関するといわれている詳細なレポート「Weather Forecasting: National Weather Service Is Planning to Improve Services and Gain Efficiency, but Impacts of Potential Changes Are Not Yet Known. GAO-06-792」を公開した。"

"Weather Forecasting: National Weather Service Is Planning to Improve Service and Gain Efficiency, but Impacts of Potential Changes Are Not Yet Known", GAO-06-792, July 14, 2006
　http://www.gao.gov/docsearch/abstract.php?rptno=GAO-06-792
　http://www.gao.gov/new.items/d06792.pdf (Pdf 45 page)


天気予報と言えば、
"CSCS Moves Swiss National Weather Prediction to Cray Supercomputer", Mar 12, 2007
　http://investors.cray.com/phoenix.zhtml?c=98390&p=irol-newsArticle&ID=972598
"On February 1, 2007, after completing accuracy and reliability tests for MeteoSwiss, CSCS began running its current suite of production weather forecasting applications on the centre's Cray XT3(TM) supercomputer system."

MeteoSwiss
　http://www.meteoschweiz.ch/web/en/weather.html

Swiss National Supercomputing Centre CSCS
　http://www.cscs.ch/
Computational resources, CSCS
　http://www.cscs.ch/a-display.php?id=23
SRNWP - Short Range Numerical Weather Prediction, CSCS
　http://srnwp.cscs.ch/Gallery/texture_loop.html

CSCSと言えば：
"Swiss National Supercomputing Centre to Nearly Triple Cray System to Meet Growing Demand
　Upgrade Will Boost Computing Power to Almost 23 Teraflops for Scientific Breakthroughs and International Collaborations", Apr 16, 2007
　http://investors.cray.com/phoenix.zhtml?c=98390&p=irol-newsArticle&ID=985031
"The supercomputer's peak performance will nearly triple from the current 8.5 teraflops (trillion floating point operations per second) to an aggregate 22.8 teraflops."
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Cray Advanced Storage Architecture (CASA), 2007-05-12
Cray XT4/XT3関連メモ III, Cray User Group (CUG) 2007, 2007-05-09