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Ara es mostren els items 23-42 de 73

    • Economic model of a cloud provider operating in a federated cloud 

      Goiri Presa, Íñigo; Guitart Fernández, Jordi; Torres Viñals, Jordi (2012-09)
      Article
      Accés restringit per política de l'editorial
      Resource provisioning in Cloud providers is a challenge because of the high variability of load over time. On the one hand, the providers can serve most of the requests owning only a restricted amount of resources, but ...

    • Elastic management of tasks in virtualized environments 

      Goiri Presa, Íñigo; Guitart Fernández, Jordi; Torres Viñals, Jordi (2009-09)
      Text en actes de congrés
      Accés obert
      Nowadays, service providers in the Cloud offer complex services ready to be used as it was a commodity like water or electricity to their customers. A key technology for this approach is virtualization which facilitates ...

    • EMOTIVE: the BSC’s engine for cloud solutions 

      Badia Sala, Rosa Maria; Goiri Presa, Íñigo; Guitart Fernández, Jordi; Macías Lloret, Mario; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Ejarque, Jorge; Sirvent Pardell, Raül; Lezzi, Daniele (2009-10-01)
      Article
      Accés obert
      Cloud computing is strongly based on virtualization, allowing applications to be multiplexed onto a physical resource while isolated from other applications sharing that physical resource. This technology simplifies the ...

    • Energy efficiency embedded service lifecycle: Towards an energy efficient cloud computing architecture 

      Djemame, Karim; Armstrong, Django; Kavanagh, Richard; Juan Ferrer, Ana; Garcia Perez, David; Antona, David; Deprez, Jean-Christophe; Ponsard, Christophe; Ortiz, David; Macías Lloret, Mario; Guitart Fernández, Jordi; Lordan Gomis, Francesc-Josep; Ejarque, Jorge; Sirvent Pardell, Raül; Badia Sala, Rosa Maria; Kammer, Michael; Kao, Odej; Agiatzidou, Eleni; Dimakis, Antonis; Courcoubetis, Costas; Blasi, Lorenzo (CEUR-WS.org, 2014)
      Text en actes de congrés
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      The paper argues the need to provide novel methods and tools to support software developers aiming to optimise energy efficiency and minimise the carbon footprint resulting from designing, developing, deploying and running ...

    • Energy efficiency support through intra-layer cloud stack adaptation 

      Djemame, Karim; Kavanagh, Richard; Armstrong, Django; Lordan Gomis, Francesc-Josep; Ejarque, Jorge; Macías Lloret, Mario; Sirvent, Raul; Guitart Fernández, Jordi; Badia Sala, Rosa Maria (Springer, 2016)
      Text en actes de congrés
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      Energy consumption is a key concern in cloud computing. The paper reports on a cloud architecture to support energy efficiency at service construction, deployment, and operation. This is achieved through SaaS, PaaS and ...

    • Energy-aware dynamic pricing model for cloud environments 

      Liu, Peini; Bravo, Gusseppe; Guitart Fernández, Jordi (Springer, 2019)
      Text en actes de congrés
      Accés obert
      Energy consumption is a critical operational cost for Cloud providers. However, as commercial providers typically use fixed pricing schemes that are oblivious about the energy costs of running virtual machines, clients are ...

    • Energy-aware scheduling in virtualized datacenters 

      Goiri Presa, Íñigo; Julià Massó, Ferran; Nou Castell, Ramon; Berral García, Josep Lluís; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010)
      Text en actes de congrés
      Accés obert
      The reduction of energy consumption in large-scale datacenters is being accomplished through an extensive use of virtualization, which enables the consolidation of multiple workloads in a smaller number of machines. ...

    • Energy-efficient and multifaceted resource management for profit-driven virtualized data centers 

      Goiri Presa, Íñigo; Berral García, Josep Lluís; Fitó, Josep Oriol; Julià Massó, Ferran; Nou Castell, Ramon; Guitart Fernández, Jordi; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (Elsevier, 2012-05)
      Article
      Accés restringit per política de l'editorial
      As long as virtualization has been introduced in data centers, it has been opening new chances for resource management. Nowadays, it is not just used as a tool for consolidating underused nodes and save power; it also ...

    • Estimation and forecasting of ecological efficiency of virtual machines 

      Katsaros, Gregory; Stichler, Pascal; Subirats, Josep; Guitart Fernández, Jordi (Elsevier, 2016-02)
      Article
      Accés obert
      The massive development of the cloud marketplace is leading to an increase in the number of the Data Centers (DCs) globally and eventually to an increase of the CO22 related footprint. The calculation of the impact of ...

    • ETP4HPC’s SRA 5 strategic research agenda for High-Performance Computing in Europe 2022: European HPC research priorities 2023-2027 

      Carpenter, Paul Matthew; Casas, Marc; Unsal, Osman Sabri; Radojkovic, Petar; Martorell Bofill, Xavier; Miranda, Alberto; Guitart Fernández, Jordi; Corbalán González, Julita; Peña Monferrer, Antonio José; Bautista Gomez, Leonardo Arturo; Vázquez García, Miguel; Beltran Querol, Vicenç; Queralt Calafat, Anna; Nou Castell, Ramon; Borrell Pol, Ricard; Houzeaux, Guillaume; Serradell Maronda, Kim; Carrera Pérez, David; García Sáez, Artur; Puchol García, Carlos (2022-09)
      Report de recerca
      Accés obert
      This document feeds research and development priorities devel-oped by the European HPC ecosystem into EuroHPC’s Research and Innovation Advisory Group with an aim to define the HPC Technology research Work Programme and ...

    • Experimental and numerical analysis for potential heat reuse in liquid cooled data centres 

      Carbó, Andreu; Oró, Eduard; Salom, Jaume; Canuto, Mauro; Macías Lloret, Mario; Guitart Fernández, Jordi (2016-03-15)
      Article
      Accés obert
      The rapid increase of data centre industry has stimulated the interest of both researchers and professionals in order to reduce energy consumption and carbon footprint of these unique infrastructures. The implementation ...

    • Exploiting semantics and virtualization for SLA-driven resource allocation in service providers 

      Ejarque, Jorge; Palol, Marc de; Goiri Presa, Íñigo; Julià, Ferran; Guitart Fernández, Jordi; Badia Sala, Rosa Maria; Torres Viñals, Jordi (2010-04-01)
      Article
      Accés restringit per política de l'editorial
      Resource management is a key challenge that service providers must adequately face in order to accomplish their business goals. This paper introduces a framework, the semantically enhanced resource allocator (SERA), aimed ...

    • Extended resource management using client classification and economic enhancements 

      Püschel, Tim; Borissov, Nikolay; Neumann, Dirk; Macías Lloret, Mario; Guitart Fernández, Jordi; Torres Viñals, Jordi (IOS Press, 2007-10)
      Capítol de llibre
      Accés obert
      Commercialization of Grid resources will become more and more important as utility computing and the deployment of Grids gains momentum. This results in the necessity to not only base Grid components on technical aspects, ...

    • Extended resource management using client classification and economic enhancements 

      Püschel, Tim; Borissov, Nikolay; Neumann, Dirk; Macías Lloret, Mario; Guitart Fernández, Jordi; Torres Viñals, Jordi (Birkhäuser Verlag, 2010)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Commercialization of computing resources will become more and more important as the transition from Grid computing in academic environments to commercial services based on concepts such as utility or Cloud computing ...

    • Fine-grained scheduling for containerized HPC workloads in Kubernetes clusters 

      Liu, Peini; Guitart Fernández, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés obert
      Containerization technology offers lightweight OS-level virtualization, and enables portability, reproducibility, and flexibility by packing applications with low performance overhead and low effort to maintain and scale ...

    • Human-in-the-loop online multi-agent approach to increase trustworthiness in ML models through trust scores and data augmentation 

      Bravo Rocca, Gusseppe Jesus; Liu, Peini; Guitart Fernández, Jordi; Dholakia, Ajay; Ellison, David; Hodak, Miroslav (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés obert
      Increasing a ML model accuracy is not enough, we must also increase its trustworthiness. This is an important step for building resilient AI systems for safety-critical applications such as automotive, finance, and healthcare. ...

    • Influence of reputation in revenue of grid service providers 

      Macías Lloret, Mario; Guitart Fernández, Jordi (2008-11-21)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The trustworthiness of commodity providers is a key issue to motivate customers to participate in a market. Several Grid Market frameworks are being developed and they are not an exception in the need of demonstrate their ...

    • Instrumentation environment for Java threaded applications 

      Guitart Fernández, Jordi; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Oliver, Jose; Labarta Mancho, Jesús José (XI Jornadas de Paralelismo, 2000)
      Text en actes de congrés
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      The rapid maturing process of the Java technology is encouraging users to develope of portable applications using the Java language. As an important part of the definition of the Java language, the use of threads is becoming ...

    • Integrated policy management framework for IaaS cloud middleware 

      Canuto, Mauro; Guitart Fernández, Jordi (2016-05)
      Article
      Accés restringit per política de l'editorial
      As a result of the rapid growth of Cloud Computing, several Cloud middleware solutions for the creation and automated management of virtual appliances have been released. Generally, these solutions offer some predefined ...

    • Introducing risk management into cloud computing 

      Fitó, Josep Oriol; Guitart Fernández, Jordi (2010-09)
      Report de recerca
      Accés obert
      The Cloud computing paradigm is offering an innovative and promising vision concerning the Information and Communications Technology (ICT). Actually, it gives the possibility of improving IT systems management and is ...