The Indra Simulation Database

Details The Indra Simulation Database The Indra Simulation Database

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813104f&link_type=abstract

American Astronomical Society, AAS Meeting #218, #131.04; Bulletin of the American Astronomical Society, Vol. 43, 2011

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We present the Indra suite of cosmological N-body simulations and the design of its companion database. Indra consists of 512 different instances of a 1 Gpc/h-sided box, each with 100 million dark matter particles and the same input cosmology, enabling a characterization of very large-scale modes of the matter power spectrum with galaxy-scale mass resolution and an excellent handle on cosmic variance. Each simulation outputs 64 snapshots, giving over 100 TB of data for the full set of simulations, all of which will be loaded into a SQL database. We discuss the database design for the particle data, consisting of the positions and velocities of each particle; the FOF halos, with links to the particle data so that halo properties can be calculated within the database; and the density field on a power-of-two grid, which can be easily linked to each particle's Peano-Hilbert index. Initial performance tests and example queries will be given.
The authors are grateful for support from the Gordon and Betty Moore and the W.M. Keck Foundations.

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