https://doi.org/10.1140/epjc/s10052-007-0499-9
Special Article - Scientific Note
First experience and adaptation of existing tools to ATLAS distributed analysis
1
IFIC – Instituto de Física Corpuscular, Centro Mixto Universitat de València – CSIC, Apartado de Correos 22085, Valencia, 46071, Spain
2
CERN – European Organization for Nuclear Research, 1211, Geneva, Switzerland
* e-mail: santiago.gonzalez@ific.uv.es
Received:
16
October
2007
Revised:
28
November
2007
Published online:
18
December
2007
The ATLAS production system has been successfully used to run production of simulation data at an unprecedented scale in ATLAS. Up to 10000 jobs were processed on about 100 sites in one day. The experiences obtained operating the system on several grid flavours was essential to perform a user analysis using grid resources. First tests of the distributed analysis system were then performed. In the preparation phase data was registered in the LHC file catalog (LFC) and replicated in external sites. For the main test, few resources were used. All these tests are only a first step towards the validation of the computing model. The ATLAS management computing board decided to integrate the collaboration efforts in distributed analysis in only one project, GANGA. The goal is to test the reconstruction and analysis software in a large scale Data production using grid flavors in several sites. GANGA allows trivial switching between running test jobs on a local batch system and running large-scale analyses on the grid; it provides job splitting and merging, and includes automated job monitoring and output retrieval.
© Springer-Verlag , 2008
