11-14 April 2011
Radisson Blu Hotel Lietuva, Vilnius
Europe/Vilnius timezone

The Pierre Auger Observatory Grid Experience

11 Apr 2011, 09:00
8h
Radisson Blu Hotel Lietuva, Vilnius

Radisson Blu Hotel Lietuva, Vilnius

Konstitucijos pr. 20 LT - 09308 Vilnius, Lithuania
Poster Poster Posters

Speaker

Dr Jiri Chudoba (CESNET)

Impact

More than 250 members of the Pierre Auger Collaboration can use libraries
of air showers simulated with different models for several energy and theta
angle values. About 40 members can process data files directly on the grid,
the rest can access files at the CC IN2P3 in Lyon, where secondary copies
of all successfully produced libraries are stored.

Description of the work

The production of air shower libraries is done in a organized way by a single
central team. Tools developped by the team members cover several steps needed
for succesful operations: preparation of input files for simulated showers according
parameters given by the collaboration, bulk job submission, output registration
in the Auger dashboard, check of results and job resubmission in case of failures.
Tens of thousands jobs were executed in the grid infrastructure. We discuss
main obstacles in job throughput increase and how we overcome them. Tools
must be often adjusted to reflect changes in the middleware.
We also present organization of simulated data preservation and how we
export them to users without access to grid Storage Elements. Custom
product SimDB is used as the database for SRB installed in CC IN2P3 Lyon.

Overview

The astroparticle physics project Pierre Auger Observatory observes
Ultra-high energy cosmic ray air showers using fluorescence and surface
detectors installed on a large area in Argentina. The CPU demanding job
of Monte Carlo simulations is done using grid resources.

Conclusions

We describe our practices for running Monte Carlo simulations jobs on the
grid and distributed data management. Current achievements and issues are
discussed.

Primary author

Dr Jiri Chudoba (CESNET)

Co-authors

Gines Rubino (Universidad de Granada) Jean-Noel Albert (LAL) Julio Lozano Bahilo (Universidad de Granada) Maria Dolores Serrano (Universidad de Granada)

Presentation Materials

There are no materials yet.