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Information Technology Preprints

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2014-04-23
21:14
Report on the parallelization of the MLfit benchmark using OpenMP and MPI / Lazzaro, Alfio ; Jarp, Sverre ; Leduc, Julien (CERN) ; Nowak, Andrzej (CERN) ; Valsan, Liviu (U. Polytechnic Bucharest)
This report describes the development of an MPI parallelization support on top of the existing OpenMP parallel version of the MLfit benchmark for a hybrid evaluation on multicore and distributed computational hosts. [...]
CERN-OPEN-2014-030. - 2012. - 9 p.
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2014-04-23
21:08
Comparison of Software Technologies for Vectorization and Parallelization / Lazzaro, Alfio ; Jarp, Sverre ; Nowak, Andrzej (CERN) ; Valsan, Liviu (U. Polytechnic Bucharest)
This paper demonstrates how modern software development methodologies can be used to give an existing sequential application a considerable performance speed-up on modern x86 server systems. [...]
CERN-OPEN-2014-029. - 2012. - 22 p.
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2013-12-06
08:57
Use of Solr and Xapian in the Invenio document repository software / Glauner, Patrick (CERN) ; Iwaszkiewicz, Jan (CERN) ; Le Meur, Jean-Yves (CERN) ; Simko, Tibor (CERN)
Invenio is a free comprehensive web-based document repository and digital library software suite originally developed at CERN. [...]
CERN-IT-2013-006 ; arXiv:1310.0250. - 2013. - 4 p.
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2013-10-30
11:42
Helix Nebula and CERN: A Symbiotic approach to exploiting commercial clouds / Barreiro Megino, Fernando Harald (CERN) ; Jones, Robert (CERN) ; Kucharczyk, Katarzyna (CERN) ; Medrano Llamas, Ramón (CERN) ; van der Ster, Daniel (CERN)
The recent paradigm shift toward cloud computing in IT, and general interest in "Big Data" in particular, have demonstrated that the computing requirements of HEP are no longer globally unique. [...]
CERN-IT-2013-004. - 2013. - 5 p.
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2013-10-30
10:08
Commissioning the CERN IT Agile Infrastructure with experiment workloads / Medrano Llamas, Ramón (CERN) ; Barreiro Megino, Fernando Harald (CERN) ; Kucharczyk, Katarzyna (CERN) ; Denis, Marek Kamil (CERN) ; Cinquilli, Mattia (CERN)
In order to ease the management of their infrastructure, most of the WLCG sites are adopting cloud based strategies. [...]
CERN-IT-2013-003. - 2013. - 6 p.
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2013-10-30
10:04
Testing as a Service with HammerCloud / Medrano Llamas, Ramón (CERN) ; Barrand, Quentin (CERN) ; Elmsheuser, Johannes (Ludwig-Maximilians-Universitӓt München) ; Legger, Federica (Ludwig-Maximilians-Universitӓt München) ; Sciacca, Gianfranco (Universitӓt Bern) ; Sciabà, Andrea (CERN) ; van der Ster, Daniel (CERN)
HammerCloud was designed and born under the needs of the grid community to test the resources and automate operations from a user perspective. [...]
CERN-IT-2013-002. - 2013. - 7 p.
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2013-07-18
11:19
Implementation of a European e-Infrastructure for the 21st Century / Jones, Bob (CERN) ; Foster, David (CERN) ; Bird, Ian (CERN) ; Hemmer, Frédéric (CERN)
This document proposes an implementation plan for the vision of an e-infrastructure as described in “A Vision for a European e-Infrastructure for the 21st Century”. [...]
CERN-OPEN-2013-019. - 2013. - 17 p.
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2013-07-03
09:51
Towards Building a Blog Preservation Platform / Kasioumis, Nikos (CERN) ; Banos, Vangelis (Aristotle University of Thessaloniki) ; Kalb, Hendrik (Technische Universität Berlin)
Social media content and user participation has increased dramatically since the advent of Web 2.0. [...]
CERN-IT-2013-001. - 2013. - 30 p.
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2013-05-22
09:47
A Vision for a European e‐Infrastructure for the 21st Century / Bird, Ian (CERN) ; Foster, David (CERN) ; Hemmer, Frédéric (CERN) ; Jones, Bob (CERN)
Over the past decade Europe has developed world‐leading expertise in building and operating very large scale federated and distributed e‐Infrastructures, supporting unprecedented scales of international collaboration in science, both within and across disciplines. [...]
CERN-OPEN-2013-018. - 2013. - 9 p.
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2013-05-06
12:29
Science, Strategy and Sustainable Solutions, a Collaboration on the Directions of E-Infrastructure for Science (S4) / Foster, David (CERN) ; Jones, Bob (CERN)
A proposal for a cross‐disciplinary user forum to collaborate on requirements and policies concerning e‐infrastructure for science..
CERN-OPEN-2013-017. - 2013. - 13 p.
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