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CERN Published Articles

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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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2019-11-13
07:58
Bootstrapping a new LHC data transfer ecosystem / Bockelman, Brian (U. Nebraska, Lincoln) ; Hanushevsky, Andrew (SLAC) ; Keeble, Oliver (CERN) ; Lassnig, Mario (CERN) ; Millar, Paul (DESY) ; Weitzel, Derek (U. Nebraska, Lincoln) ; Yang, Wei (SLAC)
GridFTP transfers and the corresponding Grid Security Infrastructure (GSI)-based authentication and authorization system have been data transfer pillars of the Worldwide LHC Computing Grid (WLCG) for more than a decade. However, in 2017, the end of support for the Globus Toolkit - the reference platform for these technologies - was announced. [...]
2019 - 9 p. - Published in : EPJ Web Conf. 214 (2019) 04045 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.04045

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2019-11-13
07:58
Advancements in data management services for distributed e-infrastructures: the eXtreme-DataCloud project / Cesini, Daniele (INFN, Bologna) ; Donvito, Giacinto (INFN, Bari) ; Costantini, Alessandro (INFN, Bologna) ; Aguilar Gomez, Fernando (Cantabria Inst. of Phys.) ; Duma, Doina Cristina (INFN, Bologna) ; Fuhrmann, Patrick (DESY) ; Dutka, Lukasz (AGH-UST, Cracow) ; Viljolen, Matthew (Unlisted, NL) ; Battaglia, Serena (Unlisted, FR) ; Poireau, Vincent (Annecy, LAPP) et al.
The development of data management services capable to cope with very large data resources is a key challenge to allow the future e-infrastructures to address the needs of the next generation extreme scale scientific experiments. To face this challenge, in November 2017 the H2020 eXtreme DataCloud - XDC project has been launched. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 04044 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.04044

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2019-11-13
07:58
CERNBox: the CERN cloud storage hub / González Labrador, Hugo (CERN) ; Alexandropoulos, Georgios (CERN) ; Bocchi, Enrico (CERN) ; Castro, Diogo (CERN) ; Chan, Belinda (CERN) ; Contescu, Cristian (CERN) ; Lamanna, Massimo (CERN) ; Lo Presti, Giuseppe (CERN) ; Mascetti, Luca (CERN) ; Moscicki, Jakub (CERN) et al.
CERNBox is the CERN cloud storage hub. It allows synchronizing and sharing files on all major desktop and mobile platforms (Linux, Windows, MacOSX, Android, iOS) aiming to provide universal access and offline availability to any data stored in the CERN EOS infrastructure. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 04038 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.04038

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2019-11-13
07:58
A Git-based Conditions Database backend for LHCb / Clemencic, Marco (CERN) /LHCb
LHCb has been using the CERN/IT developed Conditions Database library COOL for several years, during LHC Run 1 and Run 2. With the opportunity window of the second long shutdown of LHC, in preparation for Run 3 and the upgraded LHCb detector, we decided to investigate alternatives to COOL as Conditions Database backend. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 04037 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.04037

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2019-11-13
07:58
Providing large-scale disk storage at CERN / Rousseau, Hervé (CERN) ; Chan Kwok Cheong, Belinda (CERN) ; Contescu, Cristian (CERN) ; Espinal Curull, Xavier (CERN) ; Iven, Jan (CERN) ; Gonzalez Labrador, Hugo (CERN) ; Lamanna, Massimo (CERN) ; Lo Presti, Giuseppe (CERN) ; Mascetti, Luca (CERN) ; Moscicki, Jakub (CERN) et al.
The CERN IT Storage group operates multiple distributed storage systems and is responsible for the support of the infrastructure to accommodate all CERN storage requirements, from the physics data generated by LHC and non-LHC experiments to the personnel users’ files. EOS is now the key component of the CERN Storage strategy. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 04033 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.04033

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2019-11-13
07:58
WLCG space accounting in the SRM-less world / Andreeva, Julia (CERN) ; Christidis, Dimitrios (U. Patras (main)) ; Di Girolamo, Alessandro (CERN) ; Keeble, Oliver (CERN)
The WLCG computing infrastructure provides distributed storage capacity hosted at the geographically dispersed computing sites. In order to effectively organize storage and processing of the LHC data, the LHC experiments require a reliable and complete overview of the storage capacity in terms of the occupied and free space, the storage shares allocated to different computing activities, and the possibility to detect “dark” data that occupies space while being unknown to the experiment’s file catalogue. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 04021 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.04021

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2019-11-13
07:58
Scaling the EOS namespace - new developments, and performance optimizations / Bitzes, Georgios (CERN) ; Sindrilaru, Elvin Alin (CERN) ; Peters, Andreas Joachim (CERN)
EOS is the distributed storage solution being developed and deployed at CERN with the primary goal of fulfilling the data needs of the LHC and its various experiments. Being in production since 2011, EOS currently manages around 256 petabytes of raw disk space and 3.4 billion files across several instances. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 04019 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.04019

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2019-11-13
07:58
A milestone for DPM (Disk Pool Manager) / Furano, Fabrizio (CERN) ; Keeble, Oliver (CERN) ; Manzi, Andrea (CERN) ; Bitzes, Georgios (CERN)
The DPM (Disk Pool Manager) system is a multiprotocol scalable technology for Grid storage that supports about 130 sites for a total of about 90 Petabytes online. The system has recently completed the development phase that had been announced in the past years, which consolidates its core component (DOME: Disk Operations Management Engine) as a full-featured high performance engine that can also be operated with standard Web clients and uses a fully documented REST-based protocol. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 04018 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.04018

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2019-11-13
07:58
CERN Tape Archive - from development to production deployment / Davis, Michael C (CERN) ; Bahyl, Vladímir (CERN) ; Cancio, Germán (CERN) ; Cano, Eric (CERN) ; Leduc, Julien (CERN) ; Murray, Steven (CERN)
The first production version of the CERN Tape Archive (CTA) software is planned to be released during 2019. CTA is designed to replace CASTOR as the CERN tape archive solution, to face the scalability and performance challenges arriving with LHC Run–3. [...]
2019 - 9 p. - Published in : EPJ Web Conf. 214 (2019) 04015 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.04015

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