Ara es mostren els items 45-64 de 73

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