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arXiv · 2211.08293

The ATLAS EventIndex: a BigData catalogue for all ATLAS experiment events

Dario Barberis·Igor Aleksandrov·Evgeny Alexandrov·Zbigniew Baranowski·Luca Canali·Elizaveta Cherepanova·Gancho Dimitrov·Andrea Favareto·Alvaro Fernandez Casani·Elizabeth J. Gallas·Carlos Garcia Montoro·Santiago Gonzalez de la Hoz·Julius Hrivnac·Alexander Iakovlev·Andrei Kazymov·Mikhail Mineev·Fedor Prokoshin·Grigori Rybkin·Jose Salt·Javier Sanchez·Roman Sorokoletov·Rainer Toebbicke·Petya Vasileva·Miguel Villaplana Perez·Ruijun Yuan
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Abstract

The ATLAS EventIndex system comprises the catalogue of all events collected, processed or generated by the ATLAS experiment at the CERN LHC accelerator, and all associated software tools to collect, store and query this information. ATLAS records several billion particle interactions every year of operation, processes them for analysis and generates even larger simulated data samples; a global catalogue is needed to keep track of the location of each event record and be able to search and retrieve specific events for in-depth investigations. Each EventIndex record includes summary information on the event itself and the pointers to the files containing the full event. Most components of the EventIndex system are implemented using BigData open-source tools. This paper describes the architectural choices and their evolution in time, as well as the past, current and foreseen future implementations of all EventIndex components.

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Dario Barberis, Igor Aleksandrov, Evgeny Alexandrov, Zbigniew Baranowski, Luca Canali, Elizaveta Cherepanova, Gancho Dimitrov, Andrea Favareto, Alvaro Fernandez Casani, Elizabeth J. Gallas, Carlos Garcia Montoro, Santiago Gonzalez de la Hoz, Julius Hrivnac, Alexander Iakovlev, Andrei Kazymov, Mikhail Mineev, Fedor Prokoshin, Grigori Rybkin, Jose Salt, Javier Sanchez, Roman Sorokoletov, Rainer Toebbicke, Petya Vasileva, Miguel Villaplana Perez, Ruijun Yuan. 2022-11-15. The ATLAS EventIndex: a BigData catalogue for all ATLAS experiment events. https://doi.org/10.1007/s41781-023-00096-8

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