1. Jens G Jensen Atlas Petabyte store Supporting Multiple Interfaces to Mass Storage Providing Tape and Mass Storage to Diverse Scientific Communities

2. Jens G Jensen Atlas Petabyte store Requirements Data Management Locate data Retrieve data

3. Jens G Jensen Atlas Petabyte store Requirements Analyse data on the Grid Dual access – Grid and non-Grid

4. Jens G Jensen Atlas Petabyte store Requirements Curation Long term storage and archival

5. Jens G Jensen Atlas Petabyte store Requirements Very large volumes Very large real-time data rates

6. Jens G Jensen Atlas Petabyte store Requirements Recover data in emergency = backup

7. Jens G Jensen Atlas Petabyte store What is Atlas? 1.2 Petabyte capacity Tape STK Powderhorn Interfaces, services

8. Jens G Jensen Atlas Petabyte store What is Atlas? 1.2 Petabyte capacity Tape STK Powderhorn Interfaces, services New robot coming in

9. Jens G Jensen Atlas Petabyte store We support – Grid protocols SRB –Data management interface –Metadata, data SRM –Built for very large data volumes –Very high transfer rates via GridFTP

10. Jens G Jensen Atlas Petabyte store What is the Grid? Distributed computing Distributed collaborations and Virtual Organisations

11. Jens G Jensen Atlas Petabyte store What is the Grid? Access is brokered job Data is replicated

12. Jens G Jensen Atlas Petabyte store What is the Grid? Well defined protocols (sort of) File access Information providers Job submission Security

13. Jens G Jensen Atlas Petabyte store Grid Architecture, SRB Atlas SRB Scientist

14. Jens G Jensen Atlas Petabyte store Grid Architecture, SRB Atlas Local SRB Scientist Group files into container Slow network Fast network Store container Remote SRB

15. Jens G Jensen Atlas Petabyte store Grid Architecture, SRM Storage Element (SRM) File Transfer Service Replica Manager Replica Catalogue Application Information Services Components fit together to provide Grid services Atlas

16. Jens G Jensen Atlas Petabyte store We support – non-Grid protocols Tape Disk cache vtp, rfio, dcap,…

17. Jens G Jensen Atlas Petabyte store Who are the customers GridPP Tier 1 CCLRC facilities Research councils e-Science projects

18. Jens G Jensen Atlas Petabyte store Who are the customers Small – a few gigabytes To large – hundreds of Terabytes Different customers drive different areas of service Be all things to all people?

19. Jens G Jensen Atlas Petabyte store Community User group meetings Helpdesk How to tie the community together?

20. Jens G Jensen Atlas Petabyte store Conclusions Supporting multiple communities via multiple interfaces –Grid interfaces and non-Grid –Multiple requirements Diversity is good – (up to a point?) –Volume and rates driven by GridPP –Metadata driven by e-Science projects and RCUK