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1.
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LHCb High Level Trigger in remote IT datacentre
/ Martelli, Edoardo (CERN) ; Brarda, Loïc (CERN) ; Granado Cardoso, Luis (CERN) ; Collignon, Marc (CERN) ; Neufeld, Niko (CERN) ; Colombo, Tommaso (CERN) ; Cass, Tony (CERN)
In 2017 the CERN IT department and the major LHC experiments reviewed the possibility to build a common High Level Trigger facility, to share costs and for a more efficient utilization of computing resources. This paper describes a Proof-of-Concept built by the CERN IT-CS group and the LHCb online and offline teams to demonstrate the feasibility of the proposal: the dedicated, high speed connection between the LHCb detector and the IT data-centre, the setup of the servers and how they were used for offline simulation and online data taking, the different technologies considered and used, the challenges encountered and how they were tackled. [...]
2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 08007
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.08007
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2.
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The LHCb Online system in 2020: trigger-free read-out with (almost exclusively) off-the-shelf hardware
/ Colombo, T (CERN) ; Amihalachioaei, A (CERN ; Gh. Asachi Tech. U., Iasi) ; Arnaud, K (Marseille, CPPM) ; Alessio, F (CERN) ; Brarda, L (CERN) ; Cachemiche, J P (Marseille, CPPM) ; Cámpora, D (CERN ; Seville U.) ; Cap, S (Annecy, LAPP) ; Cardoso, L (CERN) ; Cindolo, F (INFN, Bologna ; U. Bologna, DIFA) et al.
The LHCb experiment at CERN has decided to optimise its physics reach by removing the first level hardware trigger for 2020 and beyond. In addition to requiring fully redesigned front-end electronics this design creates interesting challenges for the data-acquisition and the rest of the online computing system. [...]
2018 - 7 p.
- Published in : J. Phys.: Conf. Ser. 1085 (2018) 032041
Fulltext: PDF;
In : 18th International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Seattle, WA, USA, 21 - 25 Aug 2017, pp.032041
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3.
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Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC
/ LHCb Collaboration
The LHCb collaboration has redesigned its trigger to enable the full offline detector reconstruction to be performed in real time. Together with the real-time alignment and calibration of the detector, and a software infrastructure to make persistent the high-level physics objects produced during real-time processing, this redesign enabled the widespread deployment of real-time analysis during Run 2. [...]
arXiv:1812.10790; CERN-LHCb-DP-2019-001.-
2019-04-24 - 43 p.
- Published in : JINST 14 (2019) P04013
Fulltext: arXiv:1812.10790 - PDF; 1812.10790 - PDF; fulltext1711636 - PDF; Fulltext from Publisher: PDF;
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4.
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The LHCb Data Acquisition during LHC Run 1
/ Alessio, F (CERN) ; Brarda, L (CERN) ; Bonaccorsi, E (CERN) ; Campora Perez, D H (CERN) ; Chebbi, M (CERN) ; Frank, M (CERN) ; Gaspar, C (CERN) ; Granado Cardoso, L (CERN) ; Haen, C (CERN) ; v.Herwijnen, E (CERN) et al.
The LHCb Data Acquisition system reads data from over 300 read-out boards and distributes them to more than 1500 event-filter servers. It uses a simple push-protocol over Gigabit Ethernet. [...]
2014 - 7 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012033
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012033
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5.
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The LHCb Data Acquisition during LHC Run 1
/ Alessio, F (CERN) ; Brarda, L (CERN) ; Bonaccorsi, E (CERN) ; Campora Perez, D H (CERN) ; Chebbi, M (CERN) ; Frank, M (CERN) ; Gaspar, C (CERN) ; Granado Cardoso , L (CERN) ; Haen, C (CERN) ; Van Herwijnen, E (CERN) et al.
LHCb-TALK-2013-342.-
Geneva : CERN, 2013 - 21 p.
Fulltext: PDF PPTX;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013
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6.
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A new data-centre for the LHCb experiment
/ Brarda, Lo (CERN) ; Jost, Beat (CERN) ; Lacarrere, Daniel (CERN) ; Lindner, Rolf (CERN) ; Neufeld, Niko (CERN) ; Roy, Laurent (CERN) ; Thomas, Eric (CERN)
The upgraded LHCb experiment, which is supposed to go into operation in 2018/19 will require a massive increase in its computer facilities. A new 2 MW data-centre is planned at the LHCb site. [...]
2012 - 6 p.
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012009
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7.
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LHCb Online Log Analysis and Maintenance System
/ Garnier, J-C (CERN) ; Brarda, L (CERN) ; Neufeld, N (CERN) ; Nikolaidis, F (CERN)
History has shown, many times computer logs are the only information an administrator may have for an incident, which could be caused either by a malfunction or an attack. Due to the huge amount of logs that are produced from large-scale IT infrastructures, such as LHCb Online, critical information may be overlooked or simply be drowned in a sea of other messages. [...]
2011
- Published in : Conf. Proc.: C111010 (2011) , pp. THCHAUST05
Published version from JaCoW: PDF;
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.1228-1231
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8.
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Virtualization for the LHCb Experiment
/ Bonaccorsi, E (CERN) ; Brarda, L (CERN) ; Chebbi, M (CERN) ; Neufeld, N (CERN) ; Sborzacchi, F (Frascati)
2011 - 4 p.
- Published in : Conf. Proc.: C111010 (2011) , pp. WEPMU037
External link: Published version from JaCoW
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.1157-1160
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9.
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Virtualization for the LHCb Experiment
/ Bonaccorsi, E (CERN) ; Brarda, L (CERN) ; Chebbi, M (CERN) ; Neufeld, N (CERN) ; Sborzacchi, F (Frascati)
2011 - 4 p.
- Published in : Conf. Proc.: C111010 (2011) , pp. WEPMU037
External link: Published version from JaCoW
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.1157-1160
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10.
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Implications of LHCb measurements and future prospects
/ LHCb Collaboration
During 2011 the LHCb experiment at CERN collected $1.0 {\mbox{fb}^{-1}}$ of $\sqrt{s} = 7 {\mathrm{\,Te\kern -0.1em V}}$ $pp$ collisions. Due to the large heavy quark production cross-sections, these data provide unprecedented samples of heavy flavoured hadrons. [...]
arXiv:1208.3355; LHCb-PUB-2012-006; LHCB-PAPER-2012-031; CERN-PH-EP-2012-334; LHCb-PUB-2012-006; LHCB-PAPER-2012-031; CERN-PH-EP-2012-334.-
Geneva : CERN, 2013-04-26 - 178 p.
- Published in : Eur. Phys. J. C 73 (2013) 2373
Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External links: PDF on ECONF; Proceedings write-up on ECONF
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