Speaker
Dr
Hartmut Stadie
(Deutsches Elektronen-Synchrotron (DESY), Germany)
Description
The detector and collider upgrades for the HERA-II running at DESY have considerably
increased the demand on computing resources for Monte Carlo production for the ZEUS
experiment. To close the gap, an automated production system capable of using Grid
resources has been developed and commissioned.
During its first year of operation, 400 000 Grid jobs were submitted by the
production system. Using more than 30 Grid sites (LCG and Grid2003), 350 million
events were simulated and reconstructed on the Grid. We will present the production
setup and its implementation which is based on the ZEUS Grid-toolkit. Our setup
includes an elaborate system to monitor the participating sites and every submitted
Grid job. This system enables us to identify sources of failures and bottlenecks
quickly and take the appropriate actions. We will describe this monitoring system and
analyze the efficiency and typical failure modes of the current Grid infrastructure
using the collected data.
With the attained expertise the Grid can be used efficiently by the presented Monte
Carlo production system and is now the major source of Monte Carlo events for physics
analyses within the ZEUS collaboration.
Primary authors
Dr
Hartmut Stadie
(Deutsches Elektronen-Synchrotron (DESY), Germany)
Krzysztof Wrona
(Deutsches Elektronen-Synchrotron (DESY), Germany)
Co-authors
Dr
James Ferrando
(University of Glasgow, United Kingdom)
Dr
Michael Ernst
(Deutsches Elektronen-Synchrotron (DESY), Germany)
Dr
Rainer Mankel
(Deutsches Elektronen-Synchrotron (DESY), Germany)
