1. The LHC Computing Grid Project Tomi Kauppi Timo Larjo

2. LHC Large Hadron Collider World’s most powerful particle accelerator Constructed at CERN

4. LHC Properties 24 Km of magnets with a field of 8.4 Tesla Super-fluid helium cooled to 1.9 degrees of Kelvin Two counter-circulating proton beams Collision energy 7+7 TeV

5. LHC Computing Grid Project The goal is to deploy a worldwide computational grid service Will cover computing centers spread across Europe, Asia and America.

6. Grid Project Challenges Evolving technologies Changing requirements US-Europe compatibility in Grid technology Funding sources

7. Funding CERN base budget Special contributions of people and materials Industrial collaboration National funding of computing services at regional centres

8. Why Use Grid for This Project LHC will produce huge amount of data The user community and computing facilities are globally distributed different access and usage policies.

9. Why Use Grid for This Project

10. Wide area distributed data management Efficient resource scheduling Security Performance and status monitoring Reliability and sustained throughput Efficient use of high throughput wide area networks

11. The Project Overview application support and coordination computing systems Grid technology Grid deployment

12. How is the Grid planned to work

13. Possible software choices GLOBUS: X509 certificates, GSI Authentication, GridFTP, MDS LDAP based monitoring and resource discovery framework, GRAM job submission; Replica services. Authorization extensions: LDAP VO service

14. Possible software choices CONDOR: Condor-G job scheduling, matchmaking (classads), dependencies dagman. File Movement and Storage Management: GDMP, GridFTP, SRM

15. Technology Projects And Organizations Involved DataGrid CrossGrid DataTAG

16. Technology Projects And Organizations Involved GridPP (UK) INFN Grid Dutch Grid, NorduGrid Hungarian Grid

17. Technology Projects And Organizations Involved GriPhyN PPDG iVDGL