1. Lofar Information System on GRID A.N.Belikov

2. Lofar Long Term Archive Prototypes: EGEE Astro-WISE Requirements to data storage Tiers Astro-WISE adaptation Problem: optimal data placement

3. Lofar: Science

4. Lofar: Network 10 Gbps optical single data processing center for raw data (CIT, Groningen)

5. Lofar: Data Processing Blue Gene/L linux cluster centralized data processing for raw data long-term data storage

6. Lofar: LTA requirements

7. 20 PB for 5 years decentralized data storage decentralized data reprocessing international partners

8. LHC & EGEE 15 PB data per year grid computing EGEE: ~250 sites, >45000 CPU www.eu-egee.org EGEE-III

9. EGEE: Tiers approach

10. Astro-Wise: grid

11. Astro-WISE: dataservers (1)

12. Astro-WISE: dataservers (2) Astro-Wise LoWise dataserver data retrieved by URI 0.5 TB 7 sec 3.5 TB 20 sec 1 PB 8 h

13. LoWISE: URI storage

14. LoWISE: Tiers Astro-WISE-like interfaces user access (from PM to anonymous) Tier 1 as core element

15. LoWISE: data storage distributed file systems: GPFS (IBM) Lustre (Sun) dCAche CASTOR

16. Lofar-WISE: Data Storage initial configuration distributed FS & EGEE Oracle for metadata

17. Problem: users users: observer, project manager privileged users: operators

18. Problem: CE & SE geographical location file transfer user access research group driven

19. Problem: Access policy

20. Problem: Optimal Data Placement priorities groups pool of queries TCF monitor system

21. Task create and implement a system for an optimal data placement