The LCH Grid - High Performance Computing in High Energy Particle Physics
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The document discusses the Large Hadron Collider (LHC) grid and its role in high-performance computing for particle physics, emphasizing the massive amounts of data generated and the need for distributed computing to analyze it. It highlights the grid's global infrastructure, specifically Bristol's contribution through the PhEDEx software for data management. Future topics include advancements in computing and network technologies as the LHC prepares to increase its energy, potentially leading to more discoveries in particle physics.
The LCH Grid - High Performance Computing in High Energy Particle Physics
- 1. The LHC Grid High Performance Computing in High Energy Particle Physics Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 1
- 2. $ whoami • Lukasz Kreczko – ParGcle Physicist • Graduated in Physics from University of Hamburg in 2009 • 2009 – 2013 PhD in ParGcle Physics at the University of Bristol • Currently CompuGng Research Assistant at the University of Bristol Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 2
- 3. The experiment: a big digital camera Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 3
- 4. The experiment: a big digital camera Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 4 40 million “pictures” per second Each “picture” around 1 MB!
- 5. The data: a structured mess Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 5
- 6. The data: a much nicer picture Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 6 Muon: pT = 71.5 GeV/c η = ‐0.82 Missing ET: 22.3 GeV Jet: pT = 89.0 GeV/c η = 2.14 Jet: pT = 85.3 GeV/c η = 2.02 Jet: pT = 90.5 GeV/c η = ‐1.40 Run: 163583 Event: 26579562 Jet: pT = 84.1 GeV/c η = ‐2.24 m(F)=1.2 TeV/c2 _
- 7. The goal: extend our knowledge Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 7 Muon: pT = 71.5 GeV/c η = ‐0.82 Missing ET: 22.3 GeV Jet: pT = 89.0 GeV/c η = 2.14 Jet: pT = 85.3 GeV/c η = 2.02 Jet: pT = 90.5 GeV/c η = ‐1.40 Run: 163583 Event: 26579562 Jet: pT = 84.1 GeV/c η = ‐2.24 m(F)=1.2 TeV/c2 _ Billions of + simulaGon (GeV)γγm 110 120 130 140 150 S/(S+B)WeightedEvents/1.5GeV 0 500 1000 1500 Data S+B Fit B Fit Component σ1± σ2± -1 = 8 TeV, L = 5.3 fbs-1 = 7 TeV, L = 5.1 fbsCMS (GeV)γγm 120 130 Events/1.5GeV 1000 1500 Unweighted
- 8. The goal: extend our knowledge Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 8 Muon: pT = 71.5 GeV/c η = ‐0.82 Missing ET: 22.3 GeV Jet: pT = 89.0 GeV/c η = 2.14 Jet: pT = 85.3 GeV/c η = 2.02 Jet: pT = 90.5 GeV/c η = ‐1.40 Run: 163583 Event: 26579562 Jet: pT = 84.1 GeV/c η = ‐2.24 m(F)=1.2 TeV/c2 _ Billions of + simulaGon (GeV)γγm 110 120 130 140 150 S/(S+B)WeightedEvents/1.5GeV 0 500 1000 1500 Data S+B Fit B Fit Component σ1± σ2± -1 = 8 TeV, L = 5.3 fbs-1 = 7 TeV, L = 5.1 fbsCMS (GeV)γγm 120 130 Events/1.5GeV 1000 1500 Unweighted That’s the famous Higgs boson
- 9. Analysing all data • CMS records 10 000 Terabytes of data every year (around 70 years of full HD movies) • + same amount of simulaGon • To analyse this on a single computer would take 64,000 years! 9
- 10. Analysing all data • CMS records 10 000 Terabytes of data every year (around 70 years of full HD movies) • + same amount of simulaGon • To analyse this on a single computer would take 64,000 years! 10
- 11. The compuGng model: the decision Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 11
- 12. The compuGng model Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 12
- 13. The compuGng model Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 13 Bristol is one of the T2 centres
- 15. All over the world
- 16. All over the world On a normal day, the grid provides 100,000 CPU days execuGng 1 million jobs
- 17. PhEDEx: A Bristol invenGon • short for “Physics Experiment Data Export” • Sodware for data placement and the file transfer system • Development started in Bristol • One of the main developers (now at Cloudant) is giving a talk later today “Your Database to the Cloud, an Intro to Cloudant NoSQL” Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 17
- 18. PhEDEx: The components Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 18 Transfer agent Transfer management database Management agent Tools to manage transfers Local agents Web monitoring
- 19. PhEDEx: data monitoring Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 19 150 PB 70 PB hjp://www.flickr.com/photos/paulrossman/6555010435/sizes/l/in/photostream/
- 20. Current and future topics Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 20 Things changed: Network is genng cheaper as well
- 21. Current and future topics Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 21 Things changed: Network is genng cheaper as well We are moving into the cloud
- 22. Current and future topics Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 22 Things changed: Network is genng cheaper as well We are moving into the cloud Any data anywhere!
- 23. Other current and future topics Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 23 Protocol buffers CouchDB Hadoop Provisioning of compuGng
- 24. Summary & Outlook • The LHC grid is a world-‐wide distributed compuGng network that makes discoveries possible • The grid is changing to adopt to current technologies • In two years Gme the LHC will increase its energy to 14 TeV – more data, more discoveries to come! Saturday, 1 June 13 Lukasz Kreczko -‐ Bristol IT MegaMeet 24