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  1. EURO-VO DCA GRID and the VO Lofar Information System Design OmegaCEN Kapteyn Institute TARGET- Computing Center University Groningen Garching, 10 April 2008 Edwin A. Valentijn

  2. LOFAR @ (20-)30-80 MHz and 120-240 MHz • EoR • - transients • Survey • astroparticles

  3. E-Lofar: from experiment to observatory

  4. LOFAR in short • Large distributed radio telescope • In NL 2008: initial roll out 20 stations • In NL 2009: 18 central (24 Gbps) + 18 remote (2 Gbps) phased array antenna stations each ~4 soccerfields size • Full scale aperture synthesis array, extends 100km • Two main bands • High Band ~ 7,500 tiles 120 – 240 MHz • Low Band ~ 7,500 dipoles 20 – 80 MHz • DigitalRadio 40 MHz processing bandwidth • Extreme tunabilityin time/space/frequency • Large instantaneous sky coverage • Fibre network, SoftwareCorrelator • Run as a broad common-user observatory • Making the transition now from “project” to “observatory”

  5. E-LOFAR Participants • GLOW: -- Effelsberg station delivered -- Garching, Potsdam, Tautenburg stations ordered --Jülich station federal funding proposal submitted • LOFAR-UK: – Chilbolton, Cambridge, Jodrell, Edinburgh – 1 station funded, site to be chosen --3 more stations • Sweden: – Onsala station funded • + Poland, Italy, Austria, Bulgaria, Ireland, France

  6. Wires in the field

  7. Used for 1 beam & station cross correlation • 1GbE • 10 GbE • Beamformer • Beamformer • Beamformer • Beamformer • Filter • Filter • Filter • Filter • Buffer • Buffer • Buffer • Buffer • Receiver • Receiver • Receiver • Receiver Station based processing • Input data rate: ~ 460 Gbps • Output data rate: ~ 2 Gbps • Processing capacity: ~ 1.5 Tmul/s • Storage capacity: 96 Gbyte

  8. Lofar: Data Stream

  9. Lofar Storage

  10. Lofar Long term (>2weeks)archive and user enabling ADD

  11. STREAM of MetaData • Design: data driven vs. compute driven • from the field to central processor • Distributed – p2p / federated • Communities • Dataservers – own + EGEE GRID • Compute servers – own+ EGEE GRID • AstroWISE • EURO - VO

  12. LoWISE design

  13. Lofar-WISE: Data Storage • Groningen • SARA Amsterdam

  14. IBM – GPFS filesystem • Connect to AstroWISE • Storage table

  15. LoWise- concepts • All Tier 1s on an equal footing • Centrally operated GPFS distributed filesystem • File retrieval • Db viewer (web) • Prompt (db query) • Pathname – data server • gLite – Grid ftp • Single distributed db- with all Meta and source data • Valid --Quality -- ready for publication flags • Visibility of data • Owner –Project –Archive --EURO-VO • Authentication / Assigned resources • AstroWISE Oracle system

  16. Processing - options • Tier 0 – CP • Tier 1 – re-processing • Local clusters • EGEE GRID • Tier 2 • On Tier 1 • Local anarchy

  17. AstroWISE-Up

  18. VST - Virtual Survey Telescope

  19. www.astro-wise.org

  20. Astro-WISE: Services

  21. TARGET diagram

  22. QC - calibration scientist monitoring

  23. Extreme data lineage

  24. Astro-WISE: Grid Computing • selection of Target in Astro-Wise • storage element defined a priori • EGEE computing

  25. LoWise and Euro-VO

  26. GRID- EuroVO –Awe visualization

  27. AI – Cultural Heritage

  28. http://omegate.astro.rug.nl:9001/Monk