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Ara es mostren els items 37-56 de 73

    • 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
      Accés restringit per política de l'editorial
      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 ...

    • Introducing Virtual Execution Environment for Application Lifecycle Management and SLA-Driven Resource Distribution within Service Providers 

      Goiri Presa, Íñigo; Julià, Ferran; Ejarque, Jorge; Palol, Marc de; Badia Sala, Rosa Maria; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2009-07)
      Text en actes de congrés
      Accés obert
      Resource management is a key challenge that service providers must adequately face in order to ensure their profitability. This paper describes a proof-of-concept framework for facilitating resource management in service ...

    • Java instrumentation suite: accurate analysis of Java threaded applications 

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

    • Matching renewable energy supply and demand in green datacenters 

      Goiri, Iñigo; Haque, Md E.; Le, Kien; Beauchea, Ryan; Nguyen, Thu D.; Guitart Fernández, Jordi; Torres Viñals, Jordi; Bianchini, Ricardo (Elsevier, 2015-02-01)
      Article
      Accés obert
      In this paper, we propose GreenSlot, a scheduler for parallel batch jobs in a datacenter powered by a photovoltaic solar array and the electrical grid (as a backup). GreenSlot predicts the amount of solar energy that will ...

    • Maximising revenue in cloud computing markets by means of economically enhanced SLA management 

      Macías Lloret, Mario; Guitart Fernández, Jordi (2010-09-01)
      Report de recerca
      Accés obert
      This paper proposes a bidirectional communication between market brokers and resource managers in Cloud Computing Markets. This communication is implemented by means of an Economically Enhanced Resource Manager (EERM), ...

    • Maximizing revenue in Grid markets using an economically enhanced resource manager 

      Macías Lloret, Mario; Rana, Omer; Smith, Garry; Guitart Fernández, Jordi; Torres Viñals, Jordi (2008-09-01)
      Article
      Accés restringit per política de l'editorial
      Traditional resource management has had as its main objective the optimization of throughput, based on parameters such as CPU, memory, and network bandwidth. With the appearance of Grid markets, new variables that determine ...

    • Methodology for information management and data assessment in cloud environments 

      Kiran, Mariam; Katsaros, Gregory; Guitart Fernández, Jordi; Prieto, Juan Luis (IGI Global, 2014-10)
      Article
      Accés restringit per política de l'editorial
      The emergence of cloud technologies has affected the service computing ecosystem introducing new roles and relationships as well as new architectural and business models. Along with the increase of capabilities and potentials ...

    • Multifaceted resource management for dealing with heterogeneous workloads in virtualized data centers 

      Goiri Presa, Íñigo; Fitó, Josep Oriol; Julià Masso, Ferran; Nou Castell, Ramon; Berral García, Josep Lluís; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010)
      Comunicació de congrés
      Accés obert
      As long as virtualization has been introduced in data centers, it has been opening new chances for resource management. Now, it is not just used as a tool for consolidating underused nodes and save power, it also allows ...

    • OPTIMIS: A holistic approach to cloud service provisioning 

      Badia Sala, Rosa Maria; Juan, Ana; Hernández, Francisco; Tordsson, Johan; Elmroth, Erik; Ali-Eldin, Ahmed; Zsigri, Csilla; Sirvent Pardell, Raül; Guitart Fernández, Jordi; Wesner, Stefan; Kipp, Alexander; Hudzia, Benoit; Varvarigou, Theodora; Konstanteli, Kleopatra; Kousiouris, George; Nair, Srijith K.; Dimitrakos, Theo; Ziegler, Wolfgang; Djemame, Karim; Corrales, Marcelo; Sheridan, Craig; Forgó, Nikolaus; Sharif, Tabassum (Elsevier Science Direct, 2012-01)
      Article
      Accés restringit per política de l'editorial
      We present fundamental challenges for scalable and dependable service platforms and architectures that enable flexible and dynamic provisioning of cloud services. Our findings are incorporated in a toolkit targeting the ...

    • PaaS-IaaS inter-layer adaptation in an energy-aware cloud environment 

      Djemame, Karim; Bosch, Raimon; Kavanagh, Richard; Alvarez, Pol; Ejarque, Jorge; Guitart Fernández, Jordi; Blasi, Lorenzo (Institute of Electrical and Electronics Engineers (IEEE), 2017-06)
      Article
      Accés obert
      Cloud computing providers resort to a variety of techniques to improve energy consumption at each level of the cloud computing stack. Most of these techniques consider resource-level energy optimization at IaaS layer. This ...

    • Performance characterization of containerization for HPC workloads on InfiniBand clusters: an empirical study 

      Liu, Peini; Guitart Fernández, Jordi (Kluwer Academic Publishers, 2022-04)
      Article
      Accés obert
      Containerization technology offers an appealing alternative for encapsulating and operating applications (and all their dependencies) without being constrained by the performance penalties of using Virtual Machines and, ...

    • Performance characterization of multi-container deployment schemes for online learning inference 

      Liu, Peini; Guitart Fernández, Jordi; Taherkordi, Amir (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Comunicació de congrés
      Accés obert
      Online machine learning (ML) inference services provide users with an interactive way to request for predictions in realtime. To meet the notable computational requirements of such services, they are increasingly being ...

    • Performance comparison of multi-container deployment schemes for HPC workloads: an empirical study 

      Liu, Peini; Guitart Fernández, Jordi (2021-06)
      Article
      Accés obert
      The high-performance computing (HPC) community has recently started to use containerization to obtain fast, customized, portable, flexible, and reproducible deployments of their workloads. Previous work showed that deploying ...

    • Performance impact of the grid middleware 

      Carrera Pérez, David; Guitart Fernández, Jordi; Beltran Querol, Vicenç; Torres Viñals, Jordi; Ayguadé Parra, Eduard (American Scientific Publishers, 2006-01)
      Capítol de llibre
      Accés obert
      The Open Grid Services Architecture (OGSA) defines a new vision of the Grid based on the use of Web Services (Grid Services). The standard interfaces, behaviors and schemes that are consistent with the OGSA specification ...

    • Performance Improvement of Multithreaded Java Applications Execution on Multiprocessor Systems 

      Guitart Fernández, Jordi (Universitat Politècnica de Catalunya, 2005-11-02)
      Tesi
      Accés obert
      El disseny del llenguatge Java, que inclou aspectes importants com són la seva portabilitat i neutralitat envers l'arquitectura, les seves capacitats multithreading, la seva familiaritat (degut a la seva semblança amb ...