1.
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Experience with dynamic resource provisioning of the CMS online cluster using a cloud overlay
/ Da Silva Gomes, Diego (CERN) ; Andre, Jean-Marc (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp (CERN ; KIT, Karlsruhe) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Darlea, Georgiana-Lavinia (MIT) ; Deldicque, Christian (CERN) ; Demiragli, Zeynep (MIT) et al.
The primary goal of the online cluster of the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) is to build event data from the detector and to select interesting collisions in the High Level Trigger (HLT) farm for offline storage. With more than 1500 nodes and a capacity of about 850 kHEPSpecInt06, the HLT machines represent similar computing capacity of all the CMS Tier1 Grid sites together. [...]
CMS-CR-2018-398; FERMILAB-CONF-19-549-CMS.-
Geneva : CERN, 2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 07017
CMS Note: PDF; 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.07017
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2.
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Opportunistic usage of the CMS online cluster using a cloud overlay
/ Chaze, Olivier (CERN) ; Jean-Marc, Andre (Illinois U., Chicago) ; Andronidis, Anastasios (CERN) ; Behrens, Ulf (CERN) ; Branson, James (San Diego, CASS) ; Brummer, Philipp (CERN) ; Contescu, Alexandru-Cristian (UCT-CERN Res. Ctr.) ; Cittolin, Sergio (San Diego, CASS) ; Craigs, Benjamin (CERN) ; Darlea, Georgiana-Lavinia (Bucharest, Polytechnic Inst.) et al.
After two years of maintenance and upgrade, the Large Hadron Collider (LHC), the largest and most powerful particle accelerator in the world, has started its second three year run. Around 1500 computers make up the CMS (Compact Muon Solenoid) Online cluster. [...]
SISSA, 2016 - 16 p.
- Published in : PoS ISGC2016 (2016) 022
Fulltext: PDF; External link: PoS server
In : Proceedings, International Symposium on Grids and Clouds 2016: Ubiquitous e-infrastructures and Applications, Taipei, Taiwan, 13 - 18 Mar 2016, pp.22
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3.
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Operational experience with the CMS Data Acquisition System
/ Bauer, G (MIT) ; Behrens, U (DESY) ; Bowen, M (CERN) ; Branson, J (UC, San Diego) ; Bukowiec, S (CERN) ; Cittolin, S (UC, San Diego) ; Coarasa, J A (CERN) ; Deldicque, C (CERN) ; Dobson, M (CERN) ; Dupont, A (CERN) et al.
The data-acquisition (DAQ) system of the CMS experiment at the LHC performs the read-out and assembly of events accepted by the first level hardware trigger. Assembled events are made available to the high-level trigger (HLT), which selects interesting events for offline storage and analysis. [...]
CMS-CR-2012-138.-
Geneva : CERN, 2012 - 9 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 012007
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012007
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4.
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The CMS Data Acquisition - Architectures for the Phase-2 Upgrade
/ Andre, Jean-Marc Olivier (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp Maximilian (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Contescu, Cristian (Fermilab) ; Craigs, Benjamin Gordon (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) et al.
The upgraded High Luminosity LHC, after the third Long Shutdown (LS3), will provide an instantaneous luminosity of $7.5\times10^{34}$ cm$^{-2} s^{-1}$ (levelled), at the price of extreme pileup of up to 200 interactions per crossing. In LS3, the CMS Detector will also undergo a major upgrade to prepare for the phase-2 of the LHC physics program, starting around 2025. [...]
CMS-CR-2017-030.-
Geneva : CERN, 2017 - 8 p.
- Published in : J. Phys.: Conf. Ser. 898 (2017) 032019
Fulltext: PDF; External link: IOP Open Access Article
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032019
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5.
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The CMS Event-Builder System for LHC Run 3 (2021-23)
/ André, Jean-Marc (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp (CERN ; KIT, Karlsruhe) ; Cittolin, Sergio (UC, San Diego) ; Da Silva Gomes, Diego (CERN) ; Darlea, Georgiana-Lavinia (MIT) ; Deldicque, Christian (CERN) ; Demiragli, Zeynep (MIT) ; Dobson, Marc (CERN) et al.
The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider (LHC) assembles events of 2MB at a rate of 100 kHz [...]
FERMILAB-CONF-18-657-E.
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2018. - 8 p.
Fermilab Library Server (fulltext available) - Fulltext
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6.
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The CMS High Level Trigger System
/ Afaq, A (Fermilab) ; Badgett, W (Fermilab) ; Bauer, G (MIT) ; Biery, K (Fermilab) ; Boyer, V (CERN) ; Branson, J (UC, San Diego) ; Brett, A (CERN) ; Cano, E (CERN) ; Carboni, A (CERN) ; Cheung, H (Fermilab) et al.
The CMS Data Acquisition (DAQ) System relies on a purely software driven High Level Trigger (HLT) to reduce the full Level-1 accept rate of 100 kHz to approximately 100 Hz for archiving and later offline analysis. The HLT operates on the full information of events assembled by an event builder collecting detector data from the CMS front-end systems. [...]
CMS-CR-2007-017.-
Geneva : CERN, 2007 - 6 p.
Fulltext: PDF;
In : 15th IEEE Real Time Conference 2007, Fermilab, Batavia, IL, USA, 29 Apr - 4 May 2007
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7.
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A scalable online monitoring system based on Elasticsearch for distributed data acquisition in CMS
/ Andre, Jean-Marc (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp (CERN ; KIT, Karlsruhe) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; da Silva Gomes, Diego (CERN) ; Darlea, Georgiana-Lavinia (MIT) ; Deldicque, Christian (CERN) ; Demiragli, Zeynep (MIT) et al.
The part of the CMS Data Acquisition (DAQ) system responsible for data readout and event building is a complex network of interdependent distributed applications. To ensure successful data taking, these programs have to be constantly monitored in order to facilitate the timeliness of necessary corrections in case of any deviation from specified behaviour. [...]
2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 01048
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.01048
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8.
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Prototype of a File-Based High-Level Trigger in CMS
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa Perez, Jose Antonio (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The DAQ system of the CMS experiment at the LHC is upgraded during the
accelerator shutdown in 2013/14. To reduce the interdependency of the DAQ
system and the high-level trigger (HLT), we investigate the feasibility of
using a file-system-based HLT. [...]
CMS-CR-2013-380.-
Geneva : CERN, 2014 - 8 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012025
Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012025
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9.
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Operational experience with the new CMS DAQ-Expert
/ Sakulin, Hannes (CERN) ; Andre, Jean-Marc (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp (CERN ; KIT, Karlsruhe) ; Cittolin, Sergio (UC, San Diego) ; da Silva Gomes, Diego (CERN) ; Darlea, Georgiana-Lavinia (MIT) ; Deldicque, Christian (CERN) ; Demiragli, Zeynep (MIT) et al.
The data acquisition (DAQ) system of the Compact Muon Solenoid (CMS) at CERN reads out the detector at the level-1 trigger accept rate of 100 kHz, assembles events with a bandwidth of 200 GB/s, provides these events to the high level-trigger running on a farm of about 30k cores and records the accepted events. Comprising custom-built and cutting edge commercial hardware and several 1000 instances of software applications, the DAQ system is complex in itself and failures cannot be completely excluded. [...]
CMS-CR-2018-406.-
Geneva : CERN, 2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 01015
CMS Note: PDF; 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.01015
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10.
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The CMS event-builder system for LHC run 3 (2021-23)
/ Mommsen, Remigius (Fermilab) ; André, Jean-Marc (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp (CERN ; KIT, Karlsruhe) ; Cittolin, Sergio (UC, San Diego) ; da Silva Gomes, Diego (CERN) ; Darlea, Georgiana-Lavinia (MIT) ; Deldicque, Christian (CERN) ; Demiragli, Zeynep (MIT) et al.
The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider (LHC) assembles events of 2 MB at a rate of100 kHz. The event builder collects event fragments from about 750 sources and assembles them into complete events which are then handed to the High-Level Trigger (HLT) processes running on $\mathcal{O}$(1000) computers. [...]
CMS-CR-2018-388.-
Geneva : CERN, 2019 - 8 p.
- Published in : EPJ Web Conf. 214 (2019) 01006
CMS Note: PDF; 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.01006
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