Speaker
Dr
Johannes Elmsheuser
(Ludwig-Maximilians-Universität München)
Description
The distributed data analysis using Grid resources is one of the
fundamental applications in high energy physics to be addressed
and realized before the start of LHC data taking. The needs to
manage the resources are very high. In every experiment up to a
thousand physicist will be submitting analysis jobs into the Grid.
Appropriate user interfaces and helper applications have to be
made available to assure that all users can use the Grid without
too much expertise in Grid technology. These tools enlarge the
number of grid users from a few production administrators to
potentially all participating physicists.
The GANGA job management system (http://cern.ch/ganga), developed
as a common project between the ATLAS and LHCb experiments
provides and integrates these kind of tools.
GANGA provides a simple and consistent way of preparing,
organizing and executing analysis tasks within the experiment
analysis framework, implemented through a plug-in system. It allows
trivial switching between running test jobs on a local batch system
and running large-scale analyzes on the Grid, hiding Grid
technicalities.
We will be reporting on the plug-ins and our experiences of
distributed data analysis using GANGA within the ATLAS experiment
and the EGEE/LCG infrastructure. The integration with the ATLAS data management
system DQ2 into GANGA is a key functionality. In combination
with the job splitting mechanism large amounts of jobs can be sent
to the locations of data following the ATLAS computing model.
GANGA supports tasks of user analysis with reconstructed data
and small scale production of Monte Carlo data.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | ATLAS Offline Computing |
|---|
Author
Dr
Johannes Elmsheuser
(Ludwig-Maximilians-Universität München)
Co-authors
Mr
Adrian Muraru
(CERN)
Dr
Alexander Soroko
(University of Oxford)
Dr
Benjamin Gaidioz
(CERN)
Mr
Chun Lik Tan
(University of Birmingham)
Dr
Dietrich Liko
(CERN)
Mr
Frederic Brochu
(University of Cambridge)
Mr
Hurng-Chung Lee
(ASGC, Taipei and CERN)
Mr
Jakub Moscicki
(CERN)
Mr
Karl Harrison
(High Energy Physics Group, Cavendish Laboratory)
Dr
Ulrik Egede
(Imperial College London)
Mr
Vladimir Romanovsky
(State Res. Center of Russian Feder. Inst. f. High Energy Phys. (IFVE))
