CERN Accelerating science

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1.
Identifying and Understanding Scientific Network Flows / Research Networking Technical Working Group Collaboration
The High-Energy Physics (HEP) and Worldwide LHC Computing Grid (WLCG) communities have faced significant challenges in understanding their global network flows across the world’s research and education (R&E;) networks. This article describes the status of the work carried out to tackle this challenge by the Research Technical Networking Working Group (RNTWG) and the Scientific Network Tags (Scitags) initiative, including the evolving framework and tools, as well as our plans to improve network visibility before the next WLCG Network Data Challenge in early 2024. [...]
2024 - 7 p. - Published in : EPJ Web Conf. 295 (2024) 01036 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.01036
2.
US CMS Pre-Challenge / Attebury, Garhan (speaker) (University of Nebraska Lincoln (US))
2023 - 1388. DOMA; Data Challenge 2024 Workshop External links: Talk details; Event details In : Data Challenge 2024 Workshop
3.
RCS-ICT PSO Scientific Network Tags Infrastructure (Scitags) / Babik, Marian (CERN)
WLCG experiments rely on networks as one of the critical components of their infrastructure. [...]
CERN-IT-Note-2024-006.
- 2024.
Access to fulltext
4.
P4$_{flow}$: A software-defined networking approach with programmable switches for accounting and forwarding IPv6 packets with user-defined flow label tags / Moreira, Carmen Misa (CERN) ; Martelli, Edoardo (CERN) ; Cass, Tony (CERN)
A comprehensive analysis of the HEP (High Energy Physics) experiment traffic across LHCONE (Large Hadron Collider Open Network Environment) and other networks, is essential for immediate network optimisation (for example by the NOTED project) and highly desirable for long-term network planning. Such an analysis requires two steps: tagging of network packets to indicate the type and owner of the traffic being carried and then processing of the tagged packets. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 295 (2024) 07037 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07037
5.
IPv6 in production: its deployment and usage in WLCG / Babik, Marian (CERN) ; Bly, Martin (Rutherford) ; Chown, Tim (Unlisted, UK) ; Chudoba, Jiři (Prague, Inst. Phys.) ; Condurache, Catalin (Rutherford) ; Dewhurst, Alastair (Rutherford) ; Espinal Curull, Xavier (CERN) ; Finnern, Thomas (DESY) ; Froy, Terry (Queen Mary, U. of London (main)) ; Grigoras, Costin (CERN) et al.
The fraction of general internet traffic carried over IPv6 continues to grow rapidly. The transition of WLCG central and storage services to dual-stack IPv4/IPv6 is progressing well, thus enabling the use of IPv6-only CPU resources as agreed by the WLCG Management Board and presented by us at CHEP2016. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 08010 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.08010
6.
Optically Induced Surface Flashover Switching for the Dielectric Wall Accelerator / Sampayan, S ; Caporaso, G ; Carder, B ; Elizondo, J ; Norton, M ; Trimble, D
1996 External link: Published version from JACoW
In : 16th Biennial Particle Accelerator Conference and International Conference on High-Energy Accelerators, Dallas, TX, USA, 1 - 5 May 1995, pp.2123
7.
Overcoming obstacles to IPv6 on WLCG / Babik, Marian (CERN) ; Bly, Martin (Rutherford) ; Buraglio, Nick (LBL, Berkeley) ; Chown, Tim (JISC) ; Christidis, Dimitrios (CERN) ; Chudoba, Jiri (Prague, Inst. Phys.) ; DeMar, Phil (Fermilab) ; Molina, José Flix (Madrid, CIEMAT) ; Grigoras, Costin (CERN) ; Hoeft, Bruno (KIT, Karlsruhe) et al.
The transition of the Worldwide Large Hadron Collider Computing Grid (WLCG) storage services to dual-stack IPv6/IPv4 is almost complete; all Tier-1 and 94% of Tier-2 storage are IPv6 enabled. While most data transfers now use IPv6, a significant number of IPv4 transfers still occur even when both endpoints support IPv6. [...]
FERMILAB-CONF-22-902-SCD.- 2024 - 9 p. - Published in : EPJ Web Conf. 295 (2024) 07036 Fulltext: d54d88c3314bc3339be13066a6bc1224 - PDF; document - PDF; External link: Fermilab Library Server
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07036
8.
IPv6-only networking on WLCG / Babik, Marian (CERN) ; Bly, Martin (Rutherford) ; Chown, Tim ; Christidis, Dimitrios (Texas U., Arlington (main)) ; Chudoba, Jiři ; Condurache, Catalin ; Finnern, Thomas ; Froy, Terry ; Grigoras, Costin ; Hafeez, Kashif et al.
The use of IPv6 on the general Internet continues to grow. The transition of the Worldwide Large Hadron Collider Computing Grid (WLCG) central and storage services to dual-stack IPv6/IPv4 is progressing well, thus enabling the use of IPv6-only CPU resources as agreed by the WLCG Management Board and presented by us at earlier CHEP conferences. [...]
2020 - 7 p. - Published in : EPJ Web Conf. 245 (2020) 07045 Fulltext from publisher: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.07045
9.
High Gradient Insulator Technology for the Dielectric Wall Accelerator / Sampayan, S ; Caporaso, G ; Carder, B ; Chen, Y ; Eichenberger, C ; Elizondo, J ; Fockler, J ; Holmes, C ; Krogh, M ; Lauer, E et al.
1996 External link: Published version from JACoW
In : 16th Biennial Particle Accelerator Conference and International Conference on High-Energy Accelerators, Dallas, TX, USA, 1 - 5 May 1995, pp.1269
10.
Preparing for the next WLCG Network Data Challenge: Site Network Monitoring / McKee, Shawn (Michigan U.) ; Andreeva, Julia (CERN) ; Forti, Alessandra (Manchester U.) /WLCG Monitoring Task Force Collaboration
During the first WLCG Network Data Challenge in fall of 2021 (DC21) we identified shortcomings in the monitoring that impeded our ability to fully understand the results collected during the data challenge. One of the simplest missing components was site-specific network information, especially information about traffic entering and leaving any of the participating sites. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 295 (2024) 07039 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07039

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