Academic literature on the topic 'Centre de données virtualisé'
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Journal articles on the topic "Centre de données virtualisé"
Bidan, Marc, Hugues Ferreboeuf, Laurie Marrauld, and Florence Rodhain. "Le numérique est une industrie de plus en plus lourde." Reflets de la physique, no. 77 (February 2024): 151–54. http://dx.doi.org/10.1051/refdp/202477151.
Full textRubiliani, Claudio. "L’insoutenable pesanteur du réel." Topique 160, no. 1 (January 1, 2024): 137–50. http://dx.doi.org/10.3917/top.160.0137.
Full textHarvey, C. C., C. Huc, and M. Nonon-Latapie. "Centre de données de la physique des plasmas." Advances in Space Research 31, no. 5 (March 2003): 1291–95. http://dx.doi.org/10.1016/s0273-1177(02)00943-2.
Full textGervais, M. J., François Chagnon, and André Paccioni. "Augmenter l’utilisation des données probantes par les intervenants et les gestionnaires en centre jeunesse." Service social 57, no. 1 (October 20, 2011): 49–62. http://dx.doi.org/10.7202/1006247ar.
Full textCharleroy, Arnaud, Xavier Delpuech, and Pascal Neveu. "Vitioeno, un centre de ressources numériques pour la production de données scientifiques FAIR." BIO Web of Conferences 68 (2023): 01030. http://dx.doi.org/10.1051/bioconf/20236801030.
Full textDe Lamberterie, Isabelle. "La valorisation des banques de données du CNRS." Revue française d'administration publique 72, no. 1 (1994): 675–83. http://dx.doi.org/10.3406/rfap.1994.2864.
Full textPerrault, Francine, and Daniel Fortin. "Vécu et perception des usagers d’un centre de crise." Santé mentale au Québec 18, no. 1 (September 11, 2007): 287–301. http://dx.doi.org/10.7202/032260ar.
Full textRey, Grégoire, Agathe Lamarche-Vadel, and Éric Jougla. "Comment mesure-t-on les causes de décès en France ?" Questions de santé publique, no. 21 (June 2013): 1–4. http://dx.doi.org/10.1051/qsp/2013021.
Full textCohen, Marsha M., Noralou P. Roos, Carolyn DeCoster, Charlyn Black, and Kathleen M. Decker. "Bases de données du Manitoba basées sur la population et planification à long terme: Au-Delà des bases de données d'hôpitaux." Healthcare Management Forum 8, no. 3 (October 1995): 14–23. http://dx.doi.org/10.1016/s0840-4704(10)60915-5.
Full textTraoré, Kadiatou, Joseph Traoré, A. Ouattara, Souleymane Papa Coulibaly, Pakuy Pierre Mounkoro, Aperou Eloi Dara, Mahamadou Diabaté, et al. "Mali : Étude épidémioclinique des troubles psychiatriques chez les enfants du Centre d’Accueil et de Placement Familial CAPF « Pouponnière »." Psy Cause N° 77, no. 2 (April 5, 2018): 15–18. http://dx.doi.org/10.3917/psca.077.0017.
Full textDissertations / Theses on the topic "Centre de données virtualisé"
Tayachi, Zeineb. "Sûreté de fonctionnement et provisionnement éco-énergétique dans les centres de données virtualisés IaaS." Electronic Thesis or Diss., Paris, CNAM, 2021. http://www.theses.fr/2021CNAM1292.
Full textCloud computing allows users to exploit services such as infrastructures, platforms, applications, ...This allows a considerable cost and time saving since users do not need buying and managing of equipment. Moreover, they just pay the resources used (pay-as-you go). With the increasing large-scale applications and the need to store huge quantities of data, data centers have been widely deployed. However, studies have shown the under utilization of resources. Therefore, Cloud providers resort to virtualization technologies that are adopted by data center architectures and virtualized data centres have been deployed. A Virtualized Data Center is a data center where some or all of the hardware (e.g, servers, routers, switches, and links) are virtualized by using software called hypervisor that divides the equipment into multiple isolated and independent virtual instances (e.g virtual machines (VMs)). However, equipment performance can be mitigated due to several phenomena such as software aging. In this thesis, we focus on performance evaluation of two components in the data centers which are the virtualized server and the virtual switch, by usingmodeling formalisms. The first contribution concerns performability modeling and analysis of server virtualized systems subject to software aging, software rejuvenation and implements an energy management policy. A modular approach based on SRNs is proposed to investigate dependencies between several server virtualized modules. Numerical analysis shows how workload with bursty nature impacts performability metrics. This can handle decision making related to rejuvenation scheduling algorithms and to select the suitable rejuvenation mechanism. The second contribution concerns virtual switch (VS) which is considered as key element in data center networks since it achieves the communication between virtual machines. An analytical queueing model with batch arrivals and server vacations is proposed to evaluate VS performance with several network interface cards and several CPU cores. Performance metrics are obtained as a function of two proposed batch acceptance strategies and mean batch size. Numerical results aremeaningful when sizing virtual switch resources
Dumont, Frédéric. "Analyses et préconisations pour les centres de données virtualisés." Thesis, Nantes, Ecole des Mines, 2016. http://www.theses.fr/2016EMNA0249/document.
Full textThis thesis presents two contributions. The first contribution is the study of key performance indicators to monitor physical and virtual machines activity running on VMware and KVM hypervisors. This study highlights performance metrics and provides advanced analysis with the aim to prevent or detect abnormalities related to the four main resources of a datacenter: CPU, memory, disk and network. Thesecond contribution relates to a tool for virtual machines with pre-determined and / or atypical behaviors detection. The detection of these virtual machines has several objectives. First, optimize the use of hardware resources by freeing up resources by removing unnecessary virtual machines or by resizing those oversized. Second, optimize infrastructure performance by detecting undersized or overworked virtual machines and those having an atypical activity
Gogunska, Karyna. "Étude du coût de mesure des réseaux virtualisés." Thesis, Université Côte d'Azur (ComUE), 2019. http://www.theses.fr/2019AZUR4077.
Full textThe current trend in application development and deployment is to package applications within containers or virtual machines. This results in a blend of virtual and physical resources with complex network setups mixing virtual and physical switches along with specific protocols to build virtual networks spanning over several servers. While this complexity is hidden by cloud management solutions, this new environment constitutes a challenge when it comes to monitor and debug performance related issues. In this thesis, we consider the problem of measuring traffic in a virtualized environment and focus on one typical scenario, virtual machines interconnected with a virtual switch. We assess the cost of continuously measuring the network traffic of the machines. Specifically, we seek to estimate the competition that exists to access the resources (e.g., CPU) of the physical substrate between the measurement task and the application. We confirm the negative correlation of measurement within such setup and propose actions towards its minimization. Concluding on the measurement interference with virtual network, we then turn our work towards minimizing its presence in the network. We assess the capability of machine learning techniques to predict the measurement impact on the ongoing traffic between virtual machines. We propose a data-driven solution that is able to provide optimal monitoring parameters for virtual network measurements with minimum traffic interference
Le, Louët Guillaume. "Maîtrise énergétique des centres de données virtualisés : D'un scénario de charge à l'optimisation du placement des calculs." Phd thesis, Ecole des Mines de Nantes, 2014. http://tel.archives-ouvertes.fr/tel-01044650.
Full textCerović, Danilo. "Architecture réseau résiliente et hautement performante pour les datacenters virtualisés." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS478.
Full textThe amount of traffic in data centers is growing exponentially and it is not expected to stop growing any time soon. This brings about a vast amount of advancements in the networking field. Network interface throughputs supported today are in the range of 40Gbps and higher. On the other hand, such high interface throughputs do not guarantee higher packet processing speeds which are limited due to the overheads imposed by the architecture of the network stack. Nevertheless, there is a great need for a speedup in the forwarding engine, which is the most important part of a high-speed router. For this reason, many software-based and hardware-based solutions have emerged recently with a goal of increasing packet processing speeds. The networking stack of an operating system is not conceived for high-speed networking applications but rather for general purpose communications. In this thesis, we investigate various approaches that strive to improve packet processing performance on server-class network hosts, either by using software, hardware, or the combination of the two. Some of the solutions are based on the Click modular router which offloads its functions on different types of hardware like GPUs, FPGAs or different cores among different servers with parallel execution. Furthermore, we explore other software solutions which are not based on the Click modular router. We compare software and hardware packet processing solutions based on different criteria and we discuss their integration possibilities in virtualized environments, their constraints and their requirements. As our first contribution, we propose a resilient and highly performant fabric network architecture. Our goal is to build a layer 2 mesh network that only uses directly connected hardware acceleration cards that perform packet processing instead of routers and switches. We have decided to use the TRILL protocol for the communication between these smart NICs as it provides a better utilization of network links while also providing least-cost pair-wise data forwarding. The data plane packet processing is offloaded on a programmable hardware with parallel processing capability. Additionally, we propose to use the ODP API so that packet processing application code can be reused by any other packet processing solution that supports the ODP API. As our second contribution, we designed a data plane of the TRILL protocol on theMPPA (Massively Parallel Processor Array) smart NIC which supports the ODP API. Our experimental results show that we can process TRILL frames at full-duplex line-rate (up to 40Gbps) for different packet sizes while reducing latency. As our third contribution, we provide a mathematical analysis of the impact of different network topologies on the control plane’s load. The data plane packet processing is performed on the MPPA smart NICs. Our goal is to build a layer 2 mesh network that only uses directly connected smart NIC cards instead of routers and switches. We have considered various network topologies and we compared their loads induced by the control plane traffic. We have also shown that hypercube topology is the most suitable for our PoP data center use case because it does not have a high control plane load and it has a better resilience than fat-tree while having a shorter average distance between the nodes
Moussa, Hadjer. "Traitement automatique de données océanographiques pour l'interpolation de la ∫CO₂ de surface dans l'océan Atlantique tropical, en utilisant les données satellitaires." Thesis, Perpignan, 2016. http://www.theses.fr/2016PERP0025/document.
Full textThis thesis work consists of using satellite data of SST (sea surface temperature), SSS (sea surface salinity), and Chl-a (chlorophyll-a), in order to interpolate the CO2 fugacity (fCO2) in the surface of the tropical Atlantic ocean, for seasons of the period 2002-2013. Three data types were used: in situ (SOCAT V.3 DB (database)); satellite (MODIS-A, Sea-WIFS, and SMOS sensors); and assimilated (SODA V.2.2.4 DB). The first step was the data classification based on SST. The second step was the fCO2 interpolation (for each class of each season), using feedforward NNs (artificial neural networks) with a backpropagation learning method. Obtained results (RMSEs (root mean square error) between 8,8 and 15,7 µatm) confirm the importance of: process each season separately, pass through data classification step, and choose the best NN on the basis of generalization step results. This allowed the development of 138 monthly fCO2 CSV (Comma-separated values) file, with 4 km x 4 km spatial resolution, for the period from July 2002 to December 2013
Hamadache, Clarisse. "Recherche d'effets de microlentille gravitationnelle vers le centre galactique avec les données d'EROS-II." Phd thesis, Université Louis Pasteur - Strasbourg I, 2004. http://tel.archives-ouvertes.fr/tel-00008874.
Full textDumas, feris Barbara Pilar. "Réseaux optiques en mode paquet pour les connexions internes à un centre de données." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2017. http://www.theses.fr/2017IMTA0057/document.
Full textData-center energy consumption is nowadays a major issue. Intra-data-center networking accounts almost for a quarter of the data-center total power consumption. Optical switching technologies could provide higher power efficiency than current solutions based on electrical-packet switching. This work focuses on optical-packet-switched networks for small- and medium-size data centers. It takes part of the EPOC (Energy-Proportional and Opportunistic Computing) project, which main interest consists on reducing the overall power consumption of a data center partially powered by renewable sources. A key assumption is that our data center does not rely on a dedicated storage network, in order to reduce the consumption of those interconnections. In addition, with the aim of being able to turn off some servers according to the workload and the available energy, the bit rate must be close to 100 Gbit/s. We have chosen, after studying the state of the art of data-center interconnects, a purely passive network architecture based on fast-wavelength-tunable transmitters under the name of POPI.We study POPI's limitations due to its components (insertion loss, tuning range and channel spacing). We then propose an extension called E-POPI that allows to increase the number of connected servers by using several transmission bands. For larger data centers, we propose POPI+, a two-stage infrastructure for intra- and inter-rack communications operating in the C and L bands, respectively. The connection between both stages is done via a transparent gateway in one direction and an opaque one in the other. We discuss different control solutions for both stages.The feasibility of these architectures depends on, among other factors, dealing with bit-rate increasing and power losses of a passive interconnect. Coherent long-distance-transmission techniques are not currently suited to data centers. We therefore studied PAM 4 and 8 modulation formats with direct detection. On one hand, by simulation, with different bit rates (up to 112 Gbit/s) and receivers (PIN, APD and SOA-PIN) and, on the other hand, experimentally, at 12 and 18 Gbit/s. We have developed a method for compensating the distortions generated by the different network components. Our method takes into account a good tradeoff between correction accuracy and computation time.Simulation results allow us to determine the amount of insertion loss that may be supported. We then combine these results with the limitations of transmitters-tuning range and channel spacing using multiple of 12.5 GHz slots for dimensioning the proposed architectures. POPI, E-POPI and POPI+ interconnects allow the connection of 48, 99 and 2352 entities, respectively, at 112 Gbit/s. Our assessments take into account a potential dispersion of the characteristics of the main architecture components
Hamadache, Clarisse. "Recherches d'effets de microlentille gravitationnelle vers le centre galactique avec les données d'Eros II." Université Louis Pasteur (Strasbourg) (1971-2008), 2004. https://publication-theses.unistra.fr/public/theses_doctorat/2004/HAMADACHE_Clarisse_2004.pdf.
Full textThe systematic search for gravitational microlensing effect towards the galactic center makes it possible to probe the galactic structure. The thesis work presented here concerns the analysis of all galactic center data collected by the Eros2 experiment during 7 years (1996-2003) : the survey of 66 square degrees located on both sides of the galactic plane has allowed to build the lightcurves of approximately 50 million stars in two filters. Gravitational microlensing events with a duration ranging between 4 days and 500 days and whose maximum magnification is higher than 2. 18 were required ; this makes it possible to select convincing candidates and constitutes an originality compared to the previous analyses (Eros2 and other experiment) where maximum magnification was required to be higher than 1. 34. The analysis revealed 139 microlensing candidates. This sample contains 91 candidates whose source is a clump red giant star with an associated detection efficiency of 56%. The optical depth obtained for the clump red giant sources is (1,79 +/- 0,20). 10e-6. This value is in good agreement with predicted values as well as with the latest result of the Macho group but it is lower than the Ogle and Moa group results which are 2 to 3 times higher than the predicted one. In addition, the large statistics of galactic center data collected by Eros2 made it possible to calculate the optical depth for various galactic latitudes, and to detect the gradient of optical depth expected in galactic models
Kaced, Yazid. "Études du refroidissement par free cooling indirect d’un bâtiment exothermique : application au centre de données." Thesis, Lorient, 2018. http://www.theses.fr/2018LORIS499/document.
Full textA data center is a warehouse that contains telecommunication equipment, network infrastructure, servers, and computers. This equipment leads to a very high heat dissipation which must be compensated by the use of cooling systems. Telecommunication standards impose restricted climatic ranges (temperatures and humidity) leading to a very high energy consumption devote to air conditioning. The reduction of this energy consumption constitutes a real challenge which should be raised and solved. Many cooling solutions are proposed as the free cooling solution, which consists in cooling equipment by using external air in propitious climatic conditions. The work carried out during this thesis is based on experiments conducted within a building in real climatic conditions in order to study the cooling of telecom cabinets. During this study, the building configuration was modified, an indirect "free cooling" system was set up and a significant instrumentation was implemented. The objectives are to establish performance factors issued from measurements, to develop and to validate a numerical model in order to predict the thermoaeraulic behavior for this type of solution. Initially, experiments are carried out with a power dissipated inside the building and a cooling provided only by an outside air circulation. Then, significant modifications were made into the building to introduce an internal air circulation in a closed loop in order to evacuate the heat dissipated inside cabinets by a crossing airflow. In order to get a convincing database, measurements were conducted by using one and then several cabinets in different conditions. Modifications are made to operating parameters in order to better understand the installation operation and to define the energy optimization parameters. Numerical models are developed through TRNSYS / TRNFLOW. The confrontation of simulations with measurements shows the implemented approach relevance
Books on the topic "Centre de données virtualisé"
Colloque La condition des femmes immigrantes : en savoir davantage (1989 Montréal, Québec). Actes du Colloque La condition des femmes immigrantes : en savoir davantage: Faits actuels et données récentes [organisé par] le Centre des femmes de Montréal, tenu le 21 avril 1989. Montréal: Éditions Communiqu'Elles, 1990.
Find full textJournet, Charles. Commentaire de la première lettre de saint Jean et de ses récits sur la résurrection: Conférences données par le cardinal Journet à Genève au Centre universitaire catholique, du 1er novembre 1969 au 13 juin 1970. [s.l.]: Fondation du cardinal Journet, 1987.
Find full textThe Scope of the shopping centre industry in Canada, 1989 : basic facts and economic impacts =: L'industrie des centres commerciaux au Canada, 1989 : données de base et impact économique. New York, NY: International Council of Shopping Centers, 1989.
Find full textBook chapters on the topic "Centre de données virtualisé"
GENOVA, Françoise, and Mark G. ALLEN. "La communauté internationale : le Centre de données astronomiques de Strasbourg." In Partage et valorisation des données de la recherche, 57–71. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9073.ch3.
Full textFALSAFI, Babak. "Architecture de serveur pour un centre de données post-Moore." In Systèmes multiprocesseurs sur puce 2, 159–72. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9022.ch6.
Full textJARLAN, Lionel, Bertrand BONAN, Jean-Christophe CALVET, Patricia DE ROSNAY, Catherine OTTLÉ, and Philippe PEYLIN. "Assimilation de données de télédétection pour le suivi des surfaces continentales." In Inversion et assimilation de données de télédétection, 45–95. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9142.ch2.
Full textPoint, Sébastien. "Chapitre 15. L’analyse des données qualitatives : voyage au centre du codage." In Les méthodes de recherche du DBA, 262. EMS Editions, 2018. http://dx.doi.org/10.3917/ems.cheva.2018.01.0262.
Full textCharaudeau, Patrick, Guy Lochard, and Jean-Claude Soulages. "En quête d'archives." In En quête d'archives, 17–24. Institut National de l'Audiovisuel (INA), 2018. http://dx.doi.org/10.3917/ina.lecos.2018.01.0018.
Full textKrausz, Sophie. "IV. Vers la naissance de l’État : des données archéologiques et historiques confrontées aux modèles anthropologiques." In Des premières communautés paysannes à la naissance de l’État dans le Centre de la France : 5000-50 a.C., 293–344. Ausonius Éditions, 2016. http://dx.doi.org/10.4000/books.ausonius.15355.
Full textMyers, Marie J. "Viser une production optimale." In L'enseignement de l'oral en classe de langue, 15–28. Editions des archives contemporaines, 2020. http://dx.doi.org/10.17184/eac.3491.
Full textMEDZOGO, Sylvain, and Laurent GAJO. "Tensions entre norme pédagogique et normes endogènes du français." In L’expansion de la norme endogène du français en francophonie, 225–46. Editions des archives contemporaines, 2023. http://dx.doi.org/10.17184/eac.7572.
Full textMAYET, A., S. DURON, C. LAVAGNA, J. MARCHI, C. MARIMOUTOU, R. MICHEL, and J. B. MEYNARD. "Comportements à risque chez le militaire en métropole et en opérations." In Médecine et Armées Vol. 46 No.1, 73–80. Editions des archives contemporaines, 2018. http://dx.doi.org/10.17184/eac.7371.
Full textConference papers on the topic "Centre de données virtualisé"
Andersson, Fred. "Groupe µ and “the system of plastic form” -for an evaluation-." In Le Groupe μ : quarante ans de rhétorique – trente-trois ans de sémiotique visuelle. Limoges: Université de Limoges, 2010. http://dx.doi.org/10.25965/as.3097.
Full textReports on the topic "Centre de données virtualisé"
Jabet, Carole, and Cécile Petitgand. Propositions de principes directeurs : Concilier l'acceptabilité sociale active à l'utilisation secondaire des renseignements personnels sur la santé. Observatoire international sur les impacts sociétaux de l’intelligence artificielle et du numérique, September 2022. http://dx.doi.org/10.61737/yogf7213.
Full textDudoit, Alain. Les espaces européens communs de données : une initiative structurante nécessaire et adaptable au Canada. CIRANO, October 2023. http://dx.doi.org/10.54932/ryht5065.
Full textDudley, J. P., and S. V. Samsonov. Système de traitement automatisé du gouvernement canadien pour la détection des variations et l'analyse des déformations du sol à partir des données de radar à synthèse d'ouverture de RADARSAT-2 et de la mission de la Constellation RADARSAT : description et guide de l'utilisateur. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329134.
Full textSaulais, Laure, and Maurice Doyon. Impact du design de questions sur la perception des compensations proposées et les intentions de participation au pad: étude de préfaisabilité. CIRANO, August 2022. http://dx.doi.org/10.54932/ziga3839.
Full textClark, Louise, Jo Carpenter, and Joe Taylor. Des idées pour le travail d’influence : comprendre les chemins d’impact dans la réponse aux crises. Institute of Development Studies, February 2024. http://dx.doi.org/10.19088/core.2023.019.
Full textRousseau, Henri-Paul. Gutenberg, L’université et le défi numérique. CIRANO, December 2022. http://dx.doi.org/10.54932/wodt6646.
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