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CERN Accelerating science

CERN Document Server Znaleziono 17 rekordów  1 - 10następny  skocz do rekordu: Szukanie trwało 1.64 sekund. 
1.
NOTED: An intelligent network controller to improve the throughput of large data transfers in File Transfer Services by handling dynamic circuits / Moreira, Carmen Misa (CERN) ; Martelli, Edoardo (CERN) ; Cass, Tony (CERN)
The NOTED (Network Optimised Transfer of Experimental Data) project has successfully demonstrated the ability to dynamically provision network links to increase the effective bandwidth available for FTS-driven transfers between endpoints, such as WLCG sites, by inspecting on-going data transfers and so identifying those that are bandwidth-limited for a long period of time. Recently, the architecture of NOTED has been improved and the software has been packaged for easy distribution.These improved capabilities and features of NOTED have been tested and demonstrated at various international conferences. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 295 (2024) 07034 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07034
2.
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
3.
CS: 40 years in 10 minutes / Cass, Tony (speaker) (CERN)
2023 - 551. Group Meetings; CS 40th Anniversary External links: Talk details; Event details In : CS 40th Anniversary
4.
NOTED: a framework to optimise network traffic via the analysis of data from File Transfer Services / Waczyńska, Joanna (Wroclaw Tech. U. ; CERN) ; Martelli, Edoardo (CERN) ; Karavakis, Edward (CERN) ; Cass, Tony (CERN)
Network traffic optimisation is difficult as the load is by nature dynamic and seemingly unpredictable. However, the increased usage of file transfer services may help the detection of future loads and the prediction of their expected duration. [...]
2021 - 10 p. - Published in : EPJ Web Conf. 251 (2021) 02049 Fulltext: PDF;
In : 25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.02049
5.
Convolutional LSTM models to estimate network traffic / Waczynska, Joanna (Wroclaw Tech. U. ; CERN) ; Martelli, Edoardo (CERN) ; Vallecorsa, Sofia (CERN) ; Karavakis, Edward (CERN) ; Cass, Tony (CERN)
Network utilisation efficiency can, at least in principle, often be improved by dynamically re-configuring routing policies to better distribute on-going large data transfers. Unfortunately, the information necessary to decide on an appropriate reconfiguration - details of on-going and upcoming data transfers such as their source and destination and, most importantly, their volume and duration - is usually lacking. [...]
arXiv:2107.02496.- 2021 - 11 p. - Published in : EPJ Web Conf. 251 (2021) 02050 Fulltext: document - PDF; 2107.02496 - PDF;
In : 25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.02050
6.
The NOTED software tool-set improves efficient network utilization for Rucio data transfers via FTS / Busse-Grawitz, Coralie ; Martelli, Edoardo ; Lassnig, Mario ; Manzi, Andrea ; Keeble, Oliver ; Cass, Tony
We present NOTED, a project to better exploit WAN bandwidth for Rucio and FTS data transfers. We describe the developed software tool-box and a successful demonstration of automated load-balancing in the production network. [...]
2020 - 7 p. - Published in : EPJ Web Conf. 245 (2020) 07022 Fulltext: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.07022
7.
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
8.
CERN Campus Network upgrade / Kishimoto Bisbe, Carles (CERN) ; Cass, Tony (CERN)
The Campus Network has evolved organically since the last major upgrade in 2006 and a review was organised in 2018 to prepare for a long-overdue refresh to ensure the network can continue to meet evolving demands in the coming decade. [...]
CERN-IT-Note-2019-005.
- 2019. - 8 p.
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9.
CERN Technical Network upgrade / Kishimoto Bisbe, Carles (CERN) ; Cass, Tony (CERN)
The routers currently used in the Technical Network reached to an end, so the LS2 was the right time to call for a network upgrade [...]
CERN-IT-Note-2019-004.
- 2019. - 5 p.
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10.
CERN External Network evolution for LHC Run3 and Run4 / Martelli, Edoardo (CERN) ; Cass, Tony (CERN)
As from 2019, the LHC accelerator and its four major Experiments will undergo major upgrades that will dramatically increase the amount of data produced, data that not only has to be collected and stored at CERN, but also has to be sent to collaborating institutes. [...]
CERN-IT-Note-2019-003.
- 2019. - 13 p.
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