Speaker
Martin Lothar Purschke
(Brookhaven National Laboratory (US))
Description
We report on a simulation effort using the Open Science Grid which
utilized a large fraction of the available OSG resources for about 13
weeks in the first half of 2015.
sPHENIX is a proposed upgrade of the PHENIX experiment at the
Relativistic Heavy Ion Collider. We have collected large data sets of
proton-proton collision data in 2012 and 2013, and plan to carry out a
similar study with upgraded sPHENIX detector further into the
2020s. One important aspect of the study is to understand the
different contributions for the forward production of muons that are
measured in the detector. This requires a large-scale PYTHIA
simulation that matches the integrated luminosity of the PHENIX 2013
data set (about 5000 Billion collisions). Since there is no way to
pre-select the different parton-level collision types, the simulation
selects minimum-bias collisions and then discards those which are not
of the desired topology, leading to an acceptable I/O-to-CPU
ratio. This made this simulation ideal to be run on the Grid.
The Open Science Grid opened up the possibility of carrying out this
simulation in a reasonable time frame. The project used about 5
million CPU hours total. We will report on the experience running the
jobs on the OSG, and describe the steps there were taken to automate
the production in such a way that the entire simulation could be run by
one person.
| Length of presentation (max. 20 minutes) | 15 |
|---|
Primary author
Martin Lothar Purschke
(Brookhaven National Laboratory (US))
