An integrated overview of metadata in ATLAS

Abstract : 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.
Type de document :
Communication dans un congrès
J. Gruntorad ; M. Lokajicek. 17th International Conference on Computing in High Energy and Nuclear Physics (CHEP09), Mar 2009, Prague, Czech Republic. IOP Publishing, 219, pp.042009, 2010, <10.1088/1742-6596/219/4/042009>


http://hal.in2p3.fr/in2p3-00380203
Contributeur : Emmanuelle Vernay <>
Soumis le : jeudi 30 avril 2009 - 13:04:11
Dernière modification le : mardi 18 mai 2010 - 11:08:40

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E. Gallas, S. Albrand, R. Hawkings, D. Malon, E. Torrence. An integrated overview of metadata in ATLAS. J. Gruntorad ; M. Lokajicek. 17th International Conference on Computing in High Energy and Nuclear Physics (CHEP09), Mar 2009, Prague, Czech Republic. IOP Publishing, 219, pp.042009, 2010, <10.1088/1742-6596/219/4/042009>. <in2p3-00380203>

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