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Cosmological Simulations on a Grid of Computers

B. Depardon 1 Eddy Caron 1 Frédéric Desprez 1 J. Blaizot 2 H.M. Courtois 3
1 GRAAL - Algorithms and Scheduling for Distributed Heterogeneous Platforms
Inria Grenoble - Rhône-Alpes, LIP - Laboratoire de l'Informatique du Parallélisme
3 Cosmologie Observationnelle
IPNL - Institut de Physique Nucléaire de Lyon
Abstract : 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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Contributor : Sylvie Flores <>
Submitted on : Thursday, October 13, 2011 - 9:28:18 AM
Last modification on : Saturday, September 11, 2021 - 3:17:03 AM

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B. Depardon, Eddy Caron, Frédéric Desprez, J. Blaizot, H.M. Courtois. Cosmological Simulations on a Grid of Computers. Conference of the Invisible Universe, Jun 2009, Paris, France. pp.816-825, ⟨10.1063/1.3462722⟩. ⟨in2p3-00631723⟩



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