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dc.date.accessioned2018-10-05T14:27:55Z
dc.date.available2018-10-05T14:27:55Z
dc.date.created2018-01-30T12:07:43Z
dc.date.issued2017
dc.identifier.citationRichter, Matthias Rudolph Aamodt, Kenneth Arsene, Ionut Christian Bravina, Larissa Dordic, Olja Eyyubova, Gyulnara Hille, Per Thomas Kolevatov, Rodion Kværnø, Henning Lindal, Svein Løvhøiden, Gunnar Milosevic, Jovan Nilsson, Mads Stormo Nyiri, Agnes Skaali, Toralf Bernhard Tveter, Trine Spedstad Tywoniuk, Konrad Wikne, Jon Christopher Zabrodin, Evgeny Alme, Johan Bablok, Sebastian Robert Djuvsland, Øystein Fehlker, Dominik Haaland, Øystein Senneset Huang, Meidana Kanaki, Kalliopi Klovning, Arne Larsen, Dag Toppe Liu, Lijiao Nystrand, Joakim Øvrebekk, Gaute Pommeresche, Bjørn-Erling Skjerdal, Kyrre Ullaland, Kjetil Wagner, Boris Helstrup, Håvard Hetland, Kristin Fanebust Kileng, Bjarte Røed, Ketil Pocheptsov, Timur Anatolievich Altinpinar, Sedat Røhrich, Dieter Adamová, Dagmar Aggarwal, Madan M. Aglieri Rinella, Gianluca Ahammed, Zubayer Ahn, Sang Un Akindinov, Alexander Aleksandrov, Dimitry Alessandro, Bruno ALICE, Collaboration . Online data compression in the ALICE O2 facility. Journal of Physics, Conference Series. 2017, 898:032049(3), 1-8
dc.identifier.urihttp://hdl.handle.net/10852/65078
dc.description.abstractThe ALICE Collaboration and the ALICE O2 project have carried out detailed studies for a new online computing facility planned to be deployed for Run 3 of the Large Hadron Collider (LHC) at CERN. Some of the main aspects of the data handling concept are partial reconstruction of raw data organized in so called time frames, and based on that information reduction of the data rate without significant loss in the physics information. A production solution for data compression has been in operation for the ALICE Time Projection Chamber (TPC) in the ALICE High Level Trigger online system since 2011. The solution is based on reconstruction of space points from raw data. These so called clusters are the input for reconstruction of particle trajectories. Clusters are stored instead of raw data after a transformation of required parameters into an optimized format and subsequent lossless data compression techniques. With this approach, a reduction of 4.4 has been achieved on average. For Run 3, not only a significantly higher reduction is required but also improvements in the implementation of the actual algorithms. The innermost operations of the processing loop effectively need to be called up to O(1011)/s to cope with the data rate. This can only be achieved in a parallel scheme and makes these operations candidates for optimization. The potential of template programming and static dispatch in a polymorphic implementation has been studied as an alternative to the commonly used dynamic dispatch at runtime. In this contribution we report on the development of a specific programming technique to efficiently combine compile time and runtime domains and present results for the speedup of the algorithm.en_US
dc.languageEN
dc.publisherIOP Publishing
dc.rightsAttribution 3.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.titleOnline data compression in the ALICE O2 facilityen_US
dc.typeJournal articleen_US
dc.creator.authorRichter, Matthias Rudolph
dc.creator.authorAamodt, Kenneth
dc.creator.authorArsene, Ionut Christian
dc.creator.authorBravina, Larissa
dc.creator.authorDordic, Olja
dc.creator.authorEyyubova, Gyulnara
dc.creator.authorHille, Per Thomas
dc.creator.authorKolevatov, Rodion
dc.creator.authorKværnø, Henning
dc.creator.authorLindal, Svein
dc.creator.authorLøvhøiden, Gunnar
dc.creator.authorMilosevic, Jovan
dc.creator.authorNilsson, Mads Stormo
dc.creator.authorNyiri, Agnes
dc.creator.authorSkaali, Toralf Bernhard
dc.creator.authorTveter, Trine Spedstad
dc.creator.authorTywoniuk, Konrad
dc.creator.authorWikne, Jon Christopher
dc.creator.authorZabrodin, Evgeny
dc.creator.authorAlme, Johan
dc.creator.authorBablok, Sebastian Robert
dc.creator.authorDjuvsland, Øystein
dc.creator.authorFehlker, Dominik
dc.creator.authorHaaland, Øystein Senneset
dc.creator.authorHuang, Meidana
dc.creator.authorKanaki, Kalliopi
dc.creator.authorKlovning, Arne
dc.creator.authorLarsen, Dag Toppe
dc.creator.authorLiu, Lijiao
dc.creator.authorNystrand, Joakim
dc.creator.authorØvrebekk, Gaute
dc.creator.authorPommeresche, Bjørn-Erling
dc.creator.authorSkjerdal, Kyrre
dc.creator.authorUllaland, Kjetil
dc.creator.authorWagner, Boris
dc.creator.authorHelstrup, Håvard
dc.creator.authorHetland, Kristin Fanebust
dc.creator.authorKileng, Bjarte
dc.creator.authorRøed, Ketil
dc.creator.authorPocheptsov, Timur Anatolievich
dc.creator.authorAltinpinar, Sedat
dc.creator.authorRøhrich, Dieter
dc.creator.authorAdamová, Dagmar
dc.creator.authorAggarwal, Madan M.
dc.creator.authorAglieri Rinella, Gianluca
dc.creator.authorAhammed, Zubayer
dc.creator.authorAhn, Sang Un
dc.creator.authorAkindinov, Alexander
dc.creator.authorAleksandrov, Dimitry
dc.creator.authorAlessandro, Bruno
dc.creator.authorALICE, Collaboration
cristin.unitcode185,15,4,0
cristin.unitnameFysisk institutt
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1556166
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Physics, Conference Series&rft.volume=898:032049&rft.spage=1&rft.date=2017
dc.identifier.jtitleJournal of Physics, Conference Series
dc.identifier.volume898:032049
dc.identifier.issue3
dc.identifier.startpage1
dc.identifier.endpage8
dc.identifier.doihttp://dx.doi.org/10.1088/1742-6596/898/3/032049
dc.identifier.urnURN:NBN:no-67611
dc.subject.nviVDP::Kjerne- og elementærpartikkelfysikk: 431
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn1742-6588
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/65078/1/Richter_2017_J._Phys.%25253A_Conf._Ser._898_032049_HVL.pdf
dc.type.versionPublishedVersion
cristin.articleid032049


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