Impact of ROOT file parameters on ATLAS Analysis Object Data

ATLAS Analysis Object Data (xAOD) and derivative representations (DxAOD) are based on the ROOT file format. In this study, we investigate the impact of ROOT file parameters on file size and reading speeds of (D)xAODs in common ATLAS workflows. This covers LZMA, ZLIB and LZ4 compression at different...

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Detalles Bibliográficos
Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2020
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/2723199
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description ATLAS Analysis Object Data (xAOD) and derivative representations (DxAOD) are based on the ROOT file format. In this study, we investigate the impact of ROOT file parameters on file size and reading speeds of (D)xAODs in common ATLAS workflows. This covers LZMA, ZLIB and LZ4 compression at different levels, as well as ROOT features like Autoflush and the TTreeCache. Recommendations are given for different scenarios, mainly with respect to different event sizes. These recommendations can be used as a starting point for detailed studies of new usage scenarios or new proposed file formats.
id cern-2723199
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
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spelling cern-27231992021-04-19T09:06:23Zhttp://cds.cern.ch/record/2723199engThe ATLAS collaborationImpact of ROOT file parameters on ATLAS Analysis Object DataParticle Physics - ExperimentATLAS Analysis Object Data (xAOD) and derivative representations (DxAOD) are based on the ROOT file format. In this study, we investigate the impact of ROOT file parameters on file size and reading speeds of (D)xAODs in common ATLAS workflows. This covers LZMA, ZLIB and LZ4 compression at different levels, as well as ROOT features like Autoflush and the TTreeCache. Recommendations are given for different scenarios, mainly with respect to different event sizes. These recommendations can be used as a starting point for detailed studies of new usage scenarios or new proposed file formats.ATL-SOFT-PUB-2020-002oai:cds.cern.ch:27231992020-07-07
spellingShingle Particle Physics - Experiment
The ATLAS collaboration
Impact of ROOT file parameters on ATLAS Analysis Object Data
title Impact of ROOT file parameters on ATLAS Analysis Object Data
title_full Impact of ROOT file parameters on ATLAS Analysis Object Data
title_fullStr Impact of ROOT file parameters on ATLAS Analysis Object Data
title_full_unstemmed Impact of ROOT file parameters on ATLAS Analysis Object Data
title_short Impact of ROOT file parameters on ATLAS Analysis Object Data
title_sort impact of root file parameters on atlas analysis object data
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2723199
work_keys_str_mv AT theatlascollaboration impactofrootfileparametersonatlasanalysisobjectdata

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