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Cosmological Simulations on a Grid of Computers

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Conference object , Other literature type , External research report , Report 01 Jan 2010Embargo end date: 01 Jan 2010 France Publisher:AIPJournal:AIP Conference Proceedings (issn: 0094-243X, Copyright policy )
Authors: Benjamin Depardon; Eddy Caron; Frédéric Desprez; Jérémy Blaizot; Hélène Courtois; Jean-Michel Alimi; André Fuözfa;

doi: 10.1063/1.3462722 , 10.48550/arxiv.1005.3918

arXiv: http://arxiv.org/abs/1005.3918

Cosmological Simulations on a Grid of Computers

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.

Accepted and Published in AIP Conference Proceedings 1241, 2010, pages 816-825

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Keywords

Parallel computing, FOS: Computer and information sciences, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Grid-RPC, Sky surveys, Databases, [ INFO.INFO-DC ] Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], Universe, [INFO.INFO-DC] Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], N-body simulations, Instrumentation and Methods for Astrophysics (astro-ph.IM), Local uni- verse, Middleware, [SDU.ASTR.CO] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [INFO.INFO-DC]Computer Science [cs]/Distributed, 000, Archives, Data acquisition, Atlases, Astronomical catalogues, Parallel, 004, Cosmology, Astronomical catalogs, Retrieval systems, and Cluster Computing [cs.DC], Computer Science - Distributed, Parallel, and Cluster Computing, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Origin and formation of the Universe, Particle-theory and field-theory models of the early Universe, Distributed, Parallel, and Cluster Computing (cs.DC), Astrophysics - Instrumentation and Methods for Astrophysics, Data acquisition: hardware and software, Astrophysics - Cosmology and Nongalactic Astrophysics

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
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