1. IST-2006-026409 www.eu-eela.org E-infrastructure shared between Europe and Latin America High Energy Physics Applications in EELA Raquel Pezoa Universidad Técnica Federico Santa Maria, UTFSM 3rd EELA Workshop Lima, Peru, 2007-Jan-11

2. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 2 Overview HEP and GRID computing First HEP applications –ALICE –LHCb Status of installations Future applications Summary

3. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 3 HEP computing models and GRID Computing for HEP experiments requires the processing and handling of large quantities of data –Several Pbytes/year: extremely resource hungry –The LHC experiments will produce 10% of all data generated by humanity per year Ideal for GRID computing –Large number of independent events –Easily distributed –No communication required during processing

4. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 4 EELA benefit from HEP applications Mature applications Well supported –Developed by LHC collaborations –Support available to collaboration members Experiments need GRID computing –HEP communities in Latin America require GRID –HEP communities in LA are interested in collaboration with EELA Several EELA partners have HEP groups

5. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 5 LHC at CERN

6. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 6 HEP applications in EELA Applications of interest to EELA partners and other communities in Latin America –Initial applications  ALICE: Heavy ion physics at LHC Catania, CIEMAT, and UNAM  LHCb: B physics at LHC CIEMAT and UFRJ –Other LHC applications  ATLAS (General purpose) CIEMAT, UFRJ, UNLP and UTFSM  CMS (General purpose) CIEMAT; CMS has participants in EELA Brasil and Mexico, but no EELA partner from LA –New projects  Pierre Auger Observatory UFRJ, UNAM, and UNLP, others in EGEE or partner projects

7. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 7 The ALICE experiment level 0 - special hardware 8 kHz (160 GB/sec) level 1 - embedded processors level 2 - PCs 200 Hz (4 GB/sec) 30 Hz (2.5 GB/sec) 30 Hz (1.25 GB/sec) data recording & offline analysis Total weight10,000t Overall diameter 16.00m Overall length25m Magnetic Field0.4Tesla ALICE Collaboration ~1000 people, 30 countries, ~ 80 Institutes http://aliceinfo.cern.ch/

8. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 8 ALICE GRID Job 1.1lfn1 Job 1.2lfn2 Job 1.3lfn3, lfn4 Job 2.1lfn1, lfn3 Job 2.1lfn2, lfn4 Job 3.1lfn1, lfn3 Job 3.2lfn2 Site ALICE central services Optimizer Computing Agent RB CE WN Execs agent Submits job User ALICE Job Catalogue VO-Box LCG User Job ALICE catalogues Registers output lfnguid{se’s} lfnguid{se’s} lfnguid{se’s} lfnguid{se’s} lfnguid{se’s} ALICE File Catalogue packman SA xrootd GUID LFC SRM MSS File access Workload request SURL

9. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 9 ALICE data challenge Data challenge ‘06 currently running Test of the system started with simulation Up to ~3000 jobs running in parallel Next will be reconstruction and analysis Jobs of 8h on 2.5GHz Xeon produce ~800MB. With currently installed RCs: –UNAM: 8MBit/sec –CIEMAT: 240MBit/sec

10. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 10 Almost 4.5 x 10 6 CPU hours delivered from April to December of 2006 ALICE data challenge (ctd.)

11. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 11 processing ALICE distributed analysis File Catalogue query CE and SE processing User job (many events) Data set (ESD’s, AOD’s) Job Optimizer Sub-job 1 Sub-job 2Sub-job n CE and SE Job Broker Grouped by SE files location Submit to CE with closest SE Output file 1Output file 2Output file n File merging job Job output

12. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 12 ALICE in EELA Three groups –Catania –CIEMAT –UNAM Three resource centres set up for ALICE jobs –Catania –CIEMAT –UNAM Participating in data challenge Working on jobs of direct interest to EELA partners

13. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 13 The LHCb experiment http://lhcb.web.cern.ch/lhcb/

14. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 14 LHCb in EELA Two groups –CIEMAT –UFRJ Three resource centers support LHCb –Catania –CIEMAT –UFRJ In Data Challenge: Package of 500 events every 20h, 0.5Gb in size, negligible impact on network.

15. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 15 Atlas in EELA CIEMAT already established UNLP has recently joined the ATLAS collaboration UTFSM will collaborate with ATLAS (March 2007) UFRJ ATLAS group expressed interest in using the EELA infrastructure UNLP is a resource centre for ATLAS production UTFSM has the cluster running (CE, SE) UTFSM is working in HEP theory: –“Heavy Ion Physics at High Energy” –“Study the Nucleon Spin Structure Through High Energy Interaction” http://www.labmc.inf.utfsm.cl/twiki/pub/EELA/WebHome/UTFSM_EEL A_Research_Projects_2007.pdf http://atlas.web.cern.ch/Atlas/index.html

16. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 16 CMS in EELA CMS is the only LHC experiment without participation from a Latin American EELA partner CMS groups in EELA member countries –Brasil –Mexico –Spain (CIEMAT) CMS uses the same network as EELA First contacts established –Presentation at the 1st EELA conferences –Brasilian and Mexican CMS groups participated in the network survey http://cms.cern.ch/

17. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 17 Pierre Auger Observatory Four EELA partners (more collaborators in EGEE) –Catania –UFRJ –UNAM –UNLP Located in Malargüe, Mendoza, Argentina Application not yet GRID enabled, but first steps taken –Auger VO established –Collaboration between Czech Republic, Slowenia and Mexico AugerAccess project funded by EU Data transfer uses LA network infrastructure –Explore benefits from switching to GRID tools http://www.auger.org/

18. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 18 Auger location

19. IST-2006-026409 E-infrastructure shared between Europe and Latin America www.eu-eela.org Lima, Peru, 3rd EELA workshop 19 Conclusions Two applications selected and running –ALICE –LHCb Infrastructure set up to support them –Many thanks to WP2 –We have to review network requirements for LHC data taking  Information so far relates to data challenges We have more candidate applications in EELA –ATLAS –Auger CMS is the only LHC experiment without an EELA partner from Latin America –Contacts established Acknowledgement: Thanks to the experts from ALICE and LHCb for providing the technical information presented