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An integrated overview of metadata in ATLAS
Gallas E., Albrand S., Hawkings R., Malon D., Torrence E.
Dans Journal of Physics Conference Series - 17th International Conference on Computing in High Energy and Nuclear Physics (CHEP09), Prague : Tchèque, République (2009) - http://hal.in2p3.fr/in2p3-00380203
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An integrated overview of metadata in ATLAS
E. Gallas, S. Albrand1, R. Hawkings, D. Malon, E. Torrence
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
http://lpsc.in2p3.fr
CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
53 avenue des Martyrs - 38026 Grenoble Cedex
France
Metadata--data about data--arise in many contexts, from many diverse sources, and at many levels in ATLAS. Familiar examples include run-level, luminosity-block-level, and event-level metadata, and, related to processing and organization, dataset-level and file-level metadata, but these categories are neither exhaustive nor orthogonal. Some metadata are known a priori, in advance of data taking or simulation; other metadata are known only after processing--and occasionally, quite late (e.g., detector status or quality updates that may appear after Tier 0 reconstruction is complete). Metadata that may seem relevant only internally to the distributed computing infrastructure under ordinary conditions may become relevant to physics analysis under error conditions ("What can I discover about data I failed to process?"). This talk provides an overview of metadata and metadata handling in ATLAS, and describes ongoing work to deliver integrated metadata services in support of physics analysis.
ATLAS

Communications avec actes
2010
23/03/2009
Journal of Physics Conference Series
internationale
219
J. Gruntorad ; M. Lokajicek
042009
IOP Publishing

17th International Conference on Computing in High Energy and Nuclear Physics (CHEP09)
Prague
Tchèque, République
21/03/2009
27/03/2009
D. malon, E. Gallas

LPSC0956