2024-12-11
06:11 |
The ALICE Data Quality Control
/ von Haller, Barthélémy (CERN) ; Konopka, Piotr (CERN)
/ALICE Collaboration
ALICE (A Large Ion Collider Experiment) has undertaken a major upgrade during the Long Shutdown 2. The increase in the detector data rates, and in particular the continuous readout of the TPC, led to a hundredfold increase in the input raw data, up to 3.5 TB/s. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 02026
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.02026
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2024-12-11
06:11 |
Job splitting on the ALICE grid, introducing the new job optimizer for the ALICE grid middleware
/ Reme-Ness, Haakon André (HVL, Norway) ; Grigoras¸, Costin (CERN) ; Helstrup, Håvard (HVL, Norway) ; Kileng, Bjarte (HVL, Norway) ; Storetvedt, Maksim (CERN) ; Betev, Latchezar (CERN)
This contribution introduces the job optimizer service for the nextgeneration ALICE Grid middleware, JAliEn (Java Alice Environment). It is a continuous service running on central machines and is essentially responsible for splitting jobs into subjobs, to then be distributed and executed on the ALICE grid. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 04029
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.04029
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2024-12-11
06:10 |
The ALICE Service Work system
/ de Souza Pereira, Jomar Júnior (Rio de Janeiro Federal U.) ; Telesca, Adriana (CERN) ; Simão, Mario Günter (Rio de Janeiro Federal U.) ; Seixas, Jose Manuel (Rio de Janeiro Federal U.) ; Coura Torres, Rodrigo (Rio de Janeiro Federal U.)
The "A Large Ion Collider Experiment" (ALICE), one of the four large experiments at the European Organization for Nuclear Research (CERN), is responsible for studying the physics of strongly interacting matter and the quark-gluon plasma. In order to ensure the full success of ALICE operation and data taking during the Large Hadron Collider Runs 3 and 4, a list of tasks identified as Service Work is established and maintained. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 08020
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.08020
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2024-12-10
06:29 |
The ALICE Grid Workflow for LHC Run 3
/ Storetvedt, Maxim (CERN) ; Betev, Latchezar (CERN) ; Helstrup, Håvard (HVL, Norway) ; Hetland, Kristin Fanebust (HVL, Norway) ; Kileng, Bjarte (HVL, Norway)
In preparation for LHC Run 3 and 4 the ALICE Collaboration has moved to a new Grid middleware, JAliEn, and workflow management system. The migration was dictated by the substantially higher requirements on the Grid infrastructure in terms of payload complexity, increased number of jobs and managed data volume, all of which required a complete rewrite of the middleware using modern software languages and technologies. [...]
2024 - 7 p.
- Published in : EPJ Web Conf. 295 (2024) 04042
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.04042
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2024-12-10
06:29 |
The ALICE Membership system
/ de Souza Pereira, Jomar Júnior (Rio de Janeiro Federal U.) ; Telesca, Adriana (CERN) ; Seixas, Jose Manuel (Rio de Janeiro Federal U.) ; Coura Torres, Rodrigo (Rio de Janeiro Federal U.)
With over 2000 active members from 174 institutes over 41 countries in the world, the ALICE experiment is one of the 4 large experiments at CERN. With such numerous interactions, the experiment management needs a way to record members’ participation history and their current status, such as employment, institutes, appointments, clusters and funding agencies, as well as to automatically generate the physics paper author list considering the experiment publication policy. [...]
2024 - 7 p.
- Published in : EPJ Web Conf. 295 (2024) 04041
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.04041
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2024-12-10
06:29 |
Bookkeeping, a new logbook system for ALICE
/ Boulais, Martin (CERN) ; Raduta, George C (CERN) ; Huijberts, Jik (CERN)
The ALICE experiment at CERN’s Large Hadron Collider is designed to study the physics of strongly interacting matter at extreme energy densities, where a quark-gluon plasma is expected to be formed. After a major upgrade, the new ALICE Online-Offline computational system expects to read an estimated throughput of 3.5TB/s of raw data and store and index 900Gb/s reconstructed data. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 01010
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.01010
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2024-12-10
06:29 |
Multicore workflow characterisation methodology for payloads running in the ALICE Grid
/ Ferrer, Marta Bertran (CERN) ; Grigoras, Costin (CERN) ; Badia, Rosa M (Barcelona Supercomputing Ctr.)
For LHC Run3 the ALICE experiment software stack has been completely refactored, incorporating support for multicore job execution. Whereas in both LHC Run 1 and 2 the Grid jobs were single-process and made use of a single CPU core, the new multicore jobs spawn multiple processes and threads within the payload. [...]
2024 - 9 p.
- Published in : EPJ Web Conf. 295 (2024) 04005
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.04005
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2024-12-10
06:29 |
Characterization results of MAPS digital prototypes for the ALICE ITS3
/ Villani, Anna (Trieste U.)
/ALICE Collaboration
The three innermost layers of the ALICE Inner Tracking System (ITS2) will be replaced by a truly cylindrical tracker, the ITS3, to be ready for LHC Run 4 (2029–2032). The ITS3 will be composed of three layers, each made by two self-supporting, ultra-thin (≤50μm) flexible Monolithic Active Pixel silicon Sensors (MAPS) of large area (O(10 × 26 cm2)). [...]
2024 - 2 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1071 (2025) 170032
Fulltext: PDF;
In : 16th Pisa Meeting on Advanced Detectors (Pisameet 2024), La Biodola, Isola D'elba, Italy, 26 May - 1 Jun 2024, pp.170032
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2024-12-10
06:29 |
AliECS: A New Experiment Control System for the ALICE Experiment
/ Mrnjavac, Teo (CERN) ; Alexopoulos, Konstantinos (CERN) ; Chibante Barroso, Vasco (CERN) ; Guyot, Claire (CERN) ; Konopka, Piotr (CERN) ; Raduta, George (CERN)
The ALICE Experiment at CERN’s Large Hadron Collider (LHC) has undergone a major upgrade during LHC Long Shutdown 2 in 2019-2021, which includes a new computing system called O2 (Online-Offline). To ensure the efficient operation of the upgraded experiment and of its newly designed computing system, a reliable, high performance, full-featured experiment control system has also been developed and deployed at LHC Point 2. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 02027
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.02027
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2024-12-10
06:29 |
Site Sonar-A Flexible and Extensible Infrastructure Monitoring Tool for ALICE Computing Grid
/ Wijethunga, Kalana (Moratuwa U. ; CERN) ; Storetvedt, Maksim (CERN) ; Grigoras, Costin (CERN) ; Betev, Latchezar (CERN) ; Litmaath, Maarten (CERN) ; Amarasinghe, Gayashan (Moratuwa U.) ; Perera, Indika (Moratuwa U.)
The ALICE experiment at the CERN Large Hadron Collider relies on a massive, distributed Computing Grid for its data processing. The ALICE Computing Grid is built by combining a large number of individual computing sites distributed globally. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 04037
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.04037
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