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HEPiX summary GridPP13 meeting, Durham, 6 July 2005

HEPiX summary GridPP13 meeting, Durham, 6 July 2005. David Kelsey CCLRC/RAL, UK d.p.kelsey@rl.ac.uk. Overview. HEPiX meeting at FZK, Karlsruhe 9 – 13 May 2005 Not a full summary! A brief overview and some pointers for GridPP Tony Cass will cover the Batch Systems Workshop

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HEPiX summary GridPP13 meeting, Durham, 6 July 2005

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  1. HEPiX summary GridPP13 meeting, Durham, 6 July 2005 David KelseyCCLRC/RAL, UKd.p.kelsey@rl.ac.uk D.P.Kelsey, HEPiX summary, GridPP13

  2. Overview • HEPiX meeting at FZK, Karlsruhe • 9 – 13 May 2005 • Not a full summary! • A brief overview and some pointers for GridPP • Tony Cass will cover theBatch Systems Workshop • Future HEPiX meetings • 10-14 October 2005 (SLAC) • 3-7 April 2006 (Rome) (to be confirmed) D.P.Kelsey, HEPiX summary, GridPP13

  3. What is HEPiX? • A global organisation (started in 1991) • service managers and support staff providing computing facilities for HEP (and friends) • Some HEP User/Experiment community • All operating systems used by HEP covered, including UNIX, Windows and Grid computing • For several years was called HEPiX-HEPNT • Important for LCG Deployment coordination • HEPiX is the technical coordination body for LCG • Too date there is little participation by Tier 2’s D.P.Kelsey, HEPiX summary, GridPP13

  4. What is HEPiX (2)? • Two meetings per year • Europe and North America • Meetings allow participants to present recent work and future plans and to share experiences with other attendees • Encourages collaboration on topics of common concern • Scientific Linux collaboration one of the successes • Open e-mail list • hepix-hepnt@fnal.gov • Join via usual Listserv request D.P.Kelsey, HEPiX summary, GridPP13

  5. General Comments • Spring 2005 HEPiX meeting • Hosted at FZK (an LCG Tier 1) • ~100 people attendedhttp://iwrwww1.fzk.de/hepix/Attendees.html • Agenda: • all talks on web • http://iwrwww1.fzk.de/hepix/Agenda.html • Video streaming archive? – was shown live • Format • 3 full days of HEPiX presentations and discussions • 1.5 days of Batch Systems Workshop (Chair Tony Cass) D.P.Kelsey, HEPiX summary, GridPP13

  6. Agenda (1) • Topics covered • Day 1 • Introduction to FZK & 11 Site reports • Fabric Monitoring (3 talks) • Day 2 • Security Update (1) • Storage/Data Management (5) • IHEPCCC presentation (Guy Wormser) • Proposal that HEPiX gives technical input (replaces HTASC) • Scientific Linux (2) D.P.Kelsey, HEPiX summary, GridPP13

  7. Agenda (2) • Day 3 • Opteron evaluation (1) • Mail and Spam (2) • Collaborative tools (2) • User Management/Single sign-on (2) • Management of PBS (1) • LCG & Service Challenges (7) • Days 4 and 5 (Batch systems workshop) D.P.Kelsey, HEPiX summary, GridPP13

  8. Now show a few slides from a few talks D.P.Kelsey, HEPiX summary, GridPP13

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  13. Results of the Fermilab 64-bit Linux Hardware and Software Evaluation Spring 2005 HEPiX meeting Karlsruhe, Germany Ken Schumacher, Steven Timm D.P.Kelsey, HEPiX summary, GridPP13

  14. Benchmarks • All major Fermilab computing users contributed benchmarks and people to run them. • CDF: reconstruction • D0: reconstruction • CMS: OSCAR and ORCA simulation and digitization, Root stress test, Pythia • SDSS: Supernova search program • LQCD: QCDStreams, MILC lattice code • General: seti@home, CERN unit benchmark, tiny • Many more details in our paper D.P.Kelsey, HEPiX summary, GridPP13

  15. CMS Root Benchmark 64-bit mode gives gains on Opterons of about 40% D.P.Kelsey, HEPiX summary, GridPP13

  16. Power Draw In general Opterons draw 10-27% less current at full load than comparable Xeon chips. Four Opteron 248’s vary in current draw, explained by increasing numbers of fans and higher-performance disk drives. Low voltage Opteron246HE saves 10-15% over high-voltage Opteron 246. We need to average 10 kVA per rack in our facility. Have many racks now that are 12kVA. 10kVA/rack = 2.1A/node D.P.Kelsey, HEPiX summary, GridPP13

  17. Referances • Fermilab Evaluation Results: • http://www-oss.fnal.gov/scs/public/qualify2005/opteron_external.ps • AMD Developer Symposium 2002 • “Optimizing for the AMD Opteron™ Processor” by Tim Wilkens PH.D. • http://www.amd.com/us-en/assets/content_type/DownloadableAssets/Optimization_-_Tim_Wilkens.pdf D.P.Kelsey, HEPiX summary, GridPP13

  18. Conclusions • 64-bit Linux OS is a stable operating platform • Opteron CPU and associated platforms have sufficient reliability for Fermilab production Farms • Opteron CPU gives us slightly better performance for significantly less power draw and about the same price as Xeon. • Using 64-bit compilation and optimization can lead to significant performance gains on AMD and Intel. D.P.Kelsey, HEPiX summary, GridPP13

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