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German Astrophysical Virtual Observatory

German Astrophysical Virtual Observatory. Gadget on GAVOGRID. GAVO Architecture. VO-Sites. Grid Enabled Sites. GAVO WebPortal. HTTP, SOAP. Secure Protocols. WebServices. GridServices. Temporary DataSpace. UserSpace. ConeSearch. Matcher. Files. DB. Computing Tasks.

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German Astrophysical Virtual Observatory

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  1. German Astrophysical Virtual Observatory Gadget on GAVOGRID AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  2. GAVO Architecture VO-Sites Grid Enabled Sites GAVO WebPortal HTTP, SOAP Secure Protocols WebServices GridServices Temporary DataSpace UserSpace ConeSearch Matcher Files DB Computing Tasks Grid security realm Normal security realm AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  3. GAVO-GRID (testbed) using Globus GAVO-Grid AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  4. GAVO-GRID Testcase for GAVO: running MPI-application across site-boundaries: Gadget is a widely used particle-code for cosmological simulations Gadget (MPI-version) requires 2n processors Gadget roughly uses for each timestep 80% calculation, 20% communication AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  5. GAVO-GRID Running MPI-applications with Globus / mpichG2 - all nodes communicate with each other (ip-adresses known) - using ssh instead of rsh - requires a range of TCP/IP-ports open (globus-tcp-range) - allocation of bandwidth AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  6. GAVO-GRID • Results from tests with • uniform nodes AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  7. GAVO-GRID Results from tests with heterogenous nodes AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  8. GRID-Collaboration Simulations for cosmological problems improve with the number of particles. There is a clear relation between available computing ressources and the number of particles a simulation can handle. Integration of clusters using grid-technology is an option which can significantly lower the costs of getting bigger simulations running. One of the main issues then is allocation of more bandwidth AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  9. GRID-Collaboration in Potsdam: Potsdam has a good net infrastructure, where more bandwidth is relatively easy available For testing purposes, a low cost solution providing more bandwith could be installed, including AEI, AIP, PIK, Uni Potsdam This could be a first step of building part of the D-Grid at Potsdam. AEI-Clustertag, 12.05.2004 GAVO and GridComputing

  10. GRID-Collaboration AEI and AIP are using grid-technology do demanding cosmological simulations working towards a grid-integration of their respective clusters working on specific problems (visualization of simulation results, distributed file systems) AEI-Clustertag, 12.05.2004 GAVO and GridComputing

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