Ara es mostren els items 50-69 de 73

    • 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 ...
    • Remote DasaLAB : Datacenter as a Laboratory for Remote Learning - Short Paper 

      Guitart Fernández, Jordi; Costa Prats, Juan José (Universitat Politècnica de Catalunya, 2023-07-06)
      Altres
      Accés obert
    • Resource-level QoS metric for CPU-based guarantees in cloud providers 

      Goiri Presa, Íñigo; Julià Massó, Ferran; Fitó, Josep Oriol; Macías Lloret, Mario; Guitart Fernández, Jordi (Springer Verlag, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Success of Cloud computing requires that both customers and providers can be confident that signed Service Level Agreements (SLA) are supporting their respective business activities to their best extent. Currently used ...
    • Risk-driven proactive fault-tolerant operation of IaaS providers 

      Guitart Fernández, Jordi; Macías Lloret, Mario; Djemame, Karim; Kirkham, Thomas; Jiang, Ming; Armstrong, Django (IEEE Computer Society Publications, 2013)
      Comunicació de congrés
      Accés obert
      In order to improve service execution in Clouds, the management of Cloud Infrastructure has to take measures to adhere to Service Level Agreements and Business Level Objectives, from the application layer through to how ...
    • Rule-based SLA management for revenue maximisation in cloud computing markets 

      Macías Lloret, Mario; Fitó, Josep Oriol; Guitart Fernández, Jordi (IEEE Computer Society Publications, 2010)
      Text en actes de congrés
      Accés obert
      This paper introduces several Business Rules for maximising the revenue of Providers in Cloud Computing Markets. These rules apply in both negotiation and execution time, and enforce the achievement of Business-Level ...
    • Scanflow-K8s: agent-based framework for autonomic management and supervision of ML workflows in Kubernetes clusters 

      Liu, Peini; Bravo Rocca, Gusseppe; Guitart Fernández, Jordi; Dholakia, Ajay; Ellison, David; Hodak, Miroslav (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      Machine Learning (ML) projects are currently heavily based on workflows composed of some reproducible steps and executed as containerized pipelines to build or deploy ML models efficiently because of the flexibility, ...
    • Scanflow: A multi-graph framework for machine learning workflow management, supervision, and debugging 

      Bravo Rocca, Gusseppe Jesus; Liu, Peini; Guitart Fernández, Jordi; Dholakia, Ajay; Ellison, David; Falkanger, Jeffrey; Hodak, Miroslav (2022-09-15)
      Article
      Accés obert
      Machine Learning (ML) is more than just training models, the whole workflow must be considered. Once deployed, a ML model needs to be watched and constantly supervised and debugged to guarantee its validity and robustness ...
    • Scanflow: an end-to-end agent-based autonomic ML workflow manager for clusters 

      Liu, Peini; Bravo Rocca, Gusseppe Jesus; Guitart Fernández, Jordi; Dholakia, Ajay; Ellison, David; Hodak, Miroslav (Association for Computing Machinery (ACM), 2021)
      Comunicació de congrés
      Accés obert
      Machine Learning (ML) is more than just training models, the whole life-cycle must be considered. Once deployed, a ML model needs to be constantly managed, supervised and debugged to guarantee its availability, validity ...
    • Simulating complex systems with a low-detail model 

      Nou Castell, Ramon; Guitart Fernández, Jordi; Beltran Querol, Vicenç; Carrera Pérez, David; Montero Mercadé, Lídia; Torres Viñals, Jordi; Ayguadé Parra, Eduard (2005-09)
      Text en actes de congrés
      Accés obert
      In this paper we show how modeling and simulating a complex system such as a web-server can help to evaluate di erent metrics and proposals to improve the performance without necessity of using a real system. Many times ...
    • SLA-based resource management and allocation 

      Guitart Fernández, Jordi; Macías Lloret, Mario; Rana, Omer; Wieder, Philipp; Yahyapour, Ramin; Ziegler, Wolfgang (John Wiley & Sons, 2009-11)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The aim of the chapter is to describe how service-level agreements (SLAs) could be utilized to provide the basis for resource trading based on economic models. SLAs enable a service user to identify their requirements, ...
    • SLA-driven elastic cloud hosting provider 

      Fitó, Josep Oriol; Goiri Presa, Íñigo; Guitart Fernández, Jordi (2009-02-17)
      Text en actes de congrés
      Accés obert
      It is clear that Cloud computing is and will be a sea change for the Information Technology by changing the way in which both software and hardware are designed and purchased. In this work we address the use of this ...
    • Supporting CPU-based guarantees in cloud SLAs via resource-level QoS metrics 

      Goiri Presa, Íñigo; Julià Masso, Ferran; Fitó, Josep Oriol; Macías Lloret, Mario; Guitart Fernández, Jordi (Elsevier, 2012-10)
      Article
      Accés restringit per política de l'editorial
      Success of Cloud computing requires that both customers and providers can be confident that signed Service Level Agreements (SLA) are supporting their respective business activities to their best extent. Currently used ...
    • Toward business-driven risk management for cloud computing 

      Fitó, Josep Oriol; Macías Lloret, Mario; Guitart Fernández, Jordi (IEEE Computer Society Publications, 2010)
      Text en actes de congrés
      Accés obert
      The Cloud computing paradigm is offering an innovative and promising vision concerning the Information and Communications Technology (ICT). Notwithstanding, the use of Cloud resources, which usually are external assets ...
    • Toward sustainable data centers: a comprehensive energy management strategy 

      Guitart Fernández, Jordi (2016-06-28)
      Article
      Accés obert
      Data centers are major contributors to the emission of carbon dioxide to the atmosphere, and this contribution is expected to increase in the following years. This has encouraged the development of techniques to reduce the ...