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    Ipv6 testing and deployment at prague tier 2

    Kouba, Tomáŝ, Chudoba, Jiří, Eliáŝ, Marek, Fiala, Lukáŝ
    Journal of Physics: Conference Series, 2012, Vol.396(4), p.042034 (5pp) [Peer Reviewed Journal]
    IOPscience (IOP Publishing)
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    Title: Ipv6 testing and deployment at prague tier 2
    Author: Kouba, Tomáŝ; Chudoba, Jiří; Eliáŝ, Marek; Fiala, Lukáŝ
    Subject: Switching Theory ; Routing (Telecommunications) ; Computation ; Mathematical Models ; Computer Networks ; Hardware ; Networks ; Ip (Internet Protocol) ; Atomic and Molecular Physics (General) (So) ; Physics of Metals (MD) ; Physics (General) (Ah);
    Description: Computing Center of the Institute of Physics in Prague provides computing and storage resources for various HEP experiments (D0, Atlas, Alice, Auger) and currently operates more than 300 worker nodes with more than 2500 cores and provides more than 2PB of disk space. Our site is limited to one C-sized block of IPv4 addresses, and hence we had to move most of our worker nodes behind the NAT. However this solution demands more difficult routing setup. We see the IPv6 deployment as a solution that provides less routing, more switching and therefore promises higher network throughput. The administrators of the Computing Center strive to configure and install all provided services automatically. For installation tasks we use PXE and kickstart, for network configuration we use DHCP and for software configuration we use CFEngine. Many hardware boxes are configured via specific web pages or telnet/ssh protocol provided by the box itself. All our services are monitored with several tools e.g. Nagios, Munin, Ganglia. We rely heavily on the SNMP protocol for hardware health monitoring. All these installation, configuration and monitoring tools must be tested before we can switch completely to IPv6 network stack. In this contribution we present the tests we have made, limitations we have faced and configuration decisions that we have made during IPv6 testing. We also present testbed built on virtual machines that was used for all the testing and evaluation.
    Is part of: Journal of Physics: Conference Series, 2012, Vol.396(4), p.042034 (5pp)
    Identifier: 1742-6588 (ISSN); 1742-6596 (E-ISSN); 10.1088/1742-6596/396/4/042034 (DOI)

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    Grids and clouds in the Czech NGI

    Kundrát, Jan, Adam, Martin, Adamová, Dagmar, Chudoba, Jiří, Kouba, Tomáš, Lokajíček, Miloš, Mikula, Alexandr, Říkal, Václav, Švec, Jan, Vohnout, Rudolf
    Physics of Particles and Nuclei Letters, 2016, Vol.13(5), pp.669-671 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Grids and clouds in the Czech NGI
    Author: Kundrát, Jan; Adam, Martin; Adamová, Dagmar; Chudoba, Jiří; Kouba, Tomáš; Lokajíček, Miloš; Mikula, Alexandr; Říkal, Václav; Švec, Jan; Vohnout, Rudolf
    Subject: Nuclear Physics;
    Description: There are several infrastructure operators within the Czech Republic NGI (National Grid Initiative) which provide users with access to high-performance computing facilities over a grid and cloud interface. This article focuses on those where the primary author has personal first-hand experience. We cover some operational issues as well as the history of these facilities.
    Is part of: Physics of Particles and Nuclei Letters, 2016, Vol.13(5), pp.669-671
    Identifier: 1547-4771 (ISSN); 1531-8567 (E-ISSN); 10.1134/S1547477116050319 (DOI)

    • Several versions

    ATLAS utilisation of the Czech national HPC center

    Svatos, Michal, Chudoba, Jiri, Vokac, Petrri
    EPJ Web of Conferences, Vol.214 [Peer Reviewed Journal]

    • Several versions

    Improvements in utilisation of the Czech national HPC center

    Svatoš, Michal, Chudoba, Jiří, Vokáč, Petr
    EPJ Web of Conferences, Vol.245 [Peer Reviewed Journal]

    • Several versions

    Distributed resources of Czech WLCG Tier-2 center

    Martin, Adam, Adamová, Dagmar, Chudoba, Jiří, Mikula, Alexandr, Svatoš, Michal, Uhlířová, Jana, Vokáč, Petr
    EPJ Web of Conferences, Vol.245 [Peer Reviewed Journal]

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    Finanční analýza společnosti T-Mobile Czech Republic, a.s.

    Martinková, Anna
    Vysoká škola ekonomická (University of Economics, Prague)
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    Title: Finanční analýza společnosti T-Mobile Czech Republic, a.s.
    Author: Martinková, Anna
    Contributor: Bardún, Adam; Chudoba, Jiří
    Publisher: Vysoká škola ekonomická v Praze
    Subject: Mezipodnikové Srovnání ; Soustavy Ukazatelů ; Absolutní Ukazatele ; Poměrové Ukazatele ; Finanční Analýza
    Description: Práce je rozdělena do dvou hlavních částí - teoretické a praktické. V první části se zabývám významem finanční analýzy jako takové a jejími základními metodami. V praktické části aplikuji popsané postupy a metody na společnost T-Mobile Czech Republic, a.s.. Cílem mé práce je zhodnotit finanční zdraví společnosti v letech 2001-2005 z pohledu externího uživatele.

    • Several versions

    IPv6 in production: its deployment and usage in WLCG

    Babik, Marian, Bly, Martin, Chown, Tim, Chudoba, Jiři, Condurache, Catalin, Dewhurst, Alastair, Finnern, Thomas, Froy, Terry, Grigoras, Costin, Hafeez, Kashif, Hoeft, Bruno, Ito, Hironori, Kelsey, David, Martelli, Edoardo, Nandakumar, Raja, Ohrenberg, Kars, Prelz, Francesco, Rand, Duncan, Sciabà
    EPJ Web of Conferences, Vol.214 [Peer Reviewed Journal]

    • Several versions

    IPv6-only networking on WLCG

    Babik, Marian, Bly, Martin, Chown, Tim, Christidis, Dimitrios, Chudoba, Jiři, Condurache, Catalin, Finnern, Thomas, Froy, Terry, Grigoras, Costin, Hafeez, Kashif, Hoeft, Bruno, Kelsey, David, Lopes, Raul, Martelli, Edoardo, Nandakumar, Raja, Ohrenberg, Kars, Prelz, Francesco, Rand, Duncan, Sciabà
    EPJ Web of Conferences, Vol.245 [Peer Reviewed Journal]

    • Several versions

    Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy

    Aab, Alexander, Abreu, Pedro, Aglietta, Marco, Albuquerque, Ivone, Allekotte, Ingomar, Allison, Patrick, Almela, Alejandro, Alvarez-Muñiz, Jaime, Ambrosio, Michelangelo, Anastasi, Gioacchino, Anchordoqui, Luis, Andringa, Sofia, Aramo, Carla, Arqueros, Fernando, Arsene, Nicusor, Assis, Pedro, Aublin, Julien, Avila, Gualberto, Awal
    arXiv.org, Jun 21, 2016 [Peer Reviewed Journal]

    • Several versions

    Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

    Aab, Alexander, Abreu, Pedro, Aglietta, Marco, Albuquerque, Ivone, Allekotte, Ingomar, Allison, Patrick, Almela, Alejandro, Alvarez-Muñiz, Jaime, Ambrosio, Michelangelo, Anastasi, Gioacchino, Anchordoqui, Luis, Andringa, Sofia, Aramo, Carla, Arqueros, Fernando, Arsene, Nicusor, Assis, Pedro, Aublin, Julien, Avila, Gualberto, Awal
    arXiv.org, Jun 20, 2016 [Peer Reviewed Journal]