| Article Id: |
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ensl-00431770, version 1 |
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| Domaine: |
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Computer Science/Modeling and Simulation
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| Titre: |
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Cosmological Simulations on a Grid of Computers |
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| Auteur(s): |
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Benjamin Depardon1, Eddy Caron1, Frédéric Desprez1, H. Courtois2, Jeremy Blaizot3 |
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| Laboratoire: |
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LIP - Laboratoire de l'Informatique du Parallélisme |
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IPNL - Institut de Physique Nucléaire de Lyon |
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CRAL - Centre de Recherche Astrophysique de Lyon |
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| Résumé: |
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The work presented in this paper aims at restricting the input parameter values of the semi-analytical model used in Galics and MoMaF, so as to derive which parameters influence the most the results, e.g., star formation, feedback and halo recycling efficiencies, etc. Our approach is to proceed empirically: we run lots of simulations and derive the correct ranges of values. The computation time needed is so large, that we need to run on a grid of computers. Hence, we model Galics and MoMaF execution time and output files size, and run the simulation using a grid middleware: Diet. All the complexity of accessing resources, scheduling simulations and managing data is harnessed by Diet and hidden behind a web portal accessible to the users. |
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Langue du texte
intégral: |
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English |
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| Mots-clés: |
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Cosmology – N-body simulations – Parallel computing – Local universe – Middleware – Grid-RPC |
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| Commentaire: |
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13 pages |
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| Référence interne: |
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RRLIP2009-31 |
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