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Supporting Multiple Interfaces to Mass Storage
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  1. Supporting Multiple Interfacesto Mass Storage Providing Tape and Mass Storage to Diverse Scientific Communities

  2. Requirements Retrieve data Data Management Locate data

  3. Requirements Dual access – Grid and non-Grid Analyse data on the Grid

  4. Requirements Curation Long term storage and archival

  5. Requirements Very large volumes Very large real-time data rates

  6. Requirements Recover data in emergency = backup

  7. What is Atlas? • 1.2 Petabyte capacity • Tape • STK Powderhorn • Interfaces, services

  8. What is Atlas? • 1.2 Petabyte capacity • Tape • STK Powderhorn • Interfaces, services • New robot coming in

  9. We support – Grid protocols • SRB • Data management interface • Metadata, data • SRM • Built for very large data volumes • Very high transfer rates via GridFTP

  10. What is the Grid? Distributed computing Distributed collaborations and Virtual Organisations

  11. What is the Grid? Access is brokered job Data is replicated

  12. What is the Grid? Well defined protocols (sort of) • File access • Information providers • Job submission • Security

  13. Grid Architecture, SRB Scientist SRB Atlas

  14. Grid Architecture, SRB Slow network Fast network Scientist Local SRB Remote SRB Atlas Group files into container Store container

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

  16. We support – non-Grid protocols Tape Disk cache vtp, rfio, dcap,…

  17. Who are the customers GridPP Tier 1 Research councils e-Science projects CCLRC facilities

  18. 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. Community How to tie the community together? User group meetings Helpdesk

  20. 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