CERN Accelerating science

CERN Published Articles

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2019-11-14
06:14
CMS Computing Resources: Meeting the demands of the high-luminosity LHC physics program / Lange, David (Princeton U.) ; Bloom, Kenneth (Nebraska U.) ; Boccali, Tommaso (INFN, Pisa ; Pisa U.) ; Gutsche, Oliver (Fermilab) ; Vaandering, Eric (Fermilab)
The high-luminosity program has seen numerous extrapolations of its needed computing resources that each indicate the need for substantial changes if the desired HL-LHC physics program is to be supported within the current level of computing resource budgets. Drivers include large increases in event complexity (leading to increased processing time and analysis data size) and trigger rates needed (5-10 fold increases) for the HL-LHC program. [...]
FERMILAB-CONF-19-552-SCD.- 2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 03055 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03055

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2019-11-14
06:14
The Cherenkov Telescope Array production system for data-processing and Monte Carlo simulation / Arrabito, Luisa (U. Montpellier 2, LUPM) ; Bernlöhr, Konrad (Heidelberg, Max Planck Inst.) ; Bregeon, Johan (U. Montpellier 2, LUPM) ; Cumani, Paolo (Barcelona, IFAE) ; Hassan, Tarek (DESY, Zeuthen) ; Haupt, Andreas (DESY, Zeuthen) ; Maier, Gernot (DESY, Zeuthen) ; Moralejo, Abelardo (Barcelona, IFAE) ; Neyroud, Nadine (Annecy, LAPP) ; Stagni, Federico (CERN) et al. /CTA Consortium ; DIRAC Consortium
The Cherenkov Telescope Array (CTA) is the next-generation instrument in the field of very high energy gamma-ray astronomy. It will be composed of two arrays of Imaging Atmospheric Cherenkov Telescopes, located at La Palma (Spain) and Paranal (Chile). [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03052 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03052

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2019-11-14
06:14
Towards a computing model for the LHCb Upgrade / Bozzi, Concezio (CERN ; INFN, Ferrara) ; Roiser, Stefan (CERN) /LHCb
The LHCb experiment will be upgraded for data taking in the LHCRun 3. The foreseen trigger output bandwidth trigger of a few GB/s will result indata sets of tens of PB per year, which need to be efficiently streamed and stored offline for low-latency data analysis. [...]
2019 - 5 p. - Published in : EPJ Web Conf. 214 (2019) 03045 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03045

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2019-11-14
06:14
Federated identity management for research / Barton, Thomas (U. Chicago (main) ; Unlisted, US) ; Gietz, Peter (Unlisted, DE) ; Kelsey, David (Rutherford) ; Koranda, Scott (MIT, Cambridge, LIGO) ; Short, Hannah (CERN) ; Stevanovic, Uros (KIT, Karlsruhe)
Federated identity management (FIM) is an arrangement that can be made among multiple organisations that lets subscribers use the same identification data to obtain access to the secured resources of all organisations in the group. In many research communities there is an increasing interest in a common approach to FIM as there is obviously a large potential for synergies. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 03044 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03044

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2019-11-14
06:14
Towards the integrated ALICE Online-Offline (O$^2$) monitoring subsystem / Chibante Barroso, Vasco (CERN) ; Elia, Domenico (INFN, Bari) ; Grigoras, Costin (CERN) ; Gomez Ramirez, Andres (Goethe U., Frankfurt (main)) ; Vino, Gioacchino (INFN, Bari) ; Wegrzynek, Adam (CERN)
ALICE (A Large Ion Collider Experiment) is preparing for a major upgrade of the detector, readout and computing systemsfor LHC Run 3. A new facility called O$^2$ (Online-Offline) will play a major role in data compression and event processing. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03043 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03043

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2019-11-14
06:14
The security model of the ALICE next generation Grid framework / Martinez Pedreira, Miguel (CERN) ; Grigoras, Costin (CERN) ; Yurchenko, Volodymyr (Natl. Acad. of Sci. of Ukraine) ; Storetvedt, Maksim Melnik (HVL, Norway)
JAliEn (Java-AliEn) is the ALICE next generation Grid framework which will be used for the top-level distributed computing resources management during the LHC Run 3 and onward. While preserving an interface familiar to the ALICE users, its performance and scalability are an order of magnitude better than the currently used framework. [...]
2019 - 5 p. - Published in : EPJ Web Conf. 214 (2019) 03042 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03042

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2019-11-14
06:14
WISE Information Security for Collaborating e-Infrastructures / Short, Hannah (CERN) ; Kelsey, David (Rutherford) ; Wartel, Romain (CERN) ; Groep, David (Nikhef, Amsterdam) ; Kaila, Urpo (Espoo, Sci. Computing Ctr.) ; Niederberger, Ralph (Julich, Forschungszentrum) ; Harris, Nicole (Unlisted, NL)
As most are fully aware, cybersecurity attacks are an ever-growing problem as larger parts of our lives take place on-line. Distributed digital infrastructures are no exception and action must be taken to both reduce the security risk and to handle security incidents when they inevitably happen. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03041 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03041

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2019-11-14
06:14
JAliEn: the new ALICE high-performance and high-scalability Grid framework / Martinez Pedreira, M (CERN) ; Grigoras, C (CERN) ; Yurchenko, V (CERN)
The ALICE experiment will undergo extensive hardware and software upgrades for the LHC Run3. This translates in significant increase of the CPU and storage resources required for data processing, and at the same time the data access rates will grow linearly with the amount of resources. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03037 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03037

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2019-11-14
06:14
Towards a responsive CernVM-FS architecture / Popescu, Radu (CERN) ; Blomer, Jakob (CERN) ; Ganis, Gerardo (CERN)
The CernVM File System (CernVM-FS) provides a scalable and reliable software distribution service implemented as a POSIX read-only filesystem in user space (FUSE). It was originally developed at CERN to assist High Energy Physics (HEP) collaborations in deploying software on the worldwide distributed computing infrastructure for data processing applications. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03036 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03036

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2019-11-13
07:58
Disk failures in the EOS setup at CERN - A first systematic look at 1 year of collected data / Duellmann, Dirk (CERN) ; Portabales, Alfonso (CERN)
The EOS deployment at CERN is a core service used for both scientific data processing, analysis and as back-end for general end-user storage (eg home directories/CERNBOX). The collected disk failure metrics over a period of 1 year from a deployment size of some 70k disks allows a first systematic analysis of the behaviour of different hard disk types for the large CERN use-cases. [...]
2019 - 6 p. - Published in : EPJ Web Conf. 214 (2019) 04046 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.04046

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