Now showing items 1-10 of 10

  • Automatic I/O scheduler selection through online workload analysis 

    Nou Castell, Ramon; Giralt, Jacobo; Cortés Rosselló, Antonio (2013)
    Conference report
    Open Access
    I/O performance is a bottleneck for many workloads. The I/O scheduler plays an important role in it. It is typically configured once by the administrator and there is no selection that suits the system at every time. Every ...
  • DYON: Managing a new scheduling class to improve system performance in multicore systems 

    Nou Castell, Ramon; Giralt Celiméndiz, Jacobo; Cortés Rosselló, Antonio (Springer, 2013)
    Conference report
    Open Access
    Due to the increase in the number of available cores in current systems, plenty of system software starts to use some of these cores to perform tasks that will help optimize the application behaviour. Unfortunately, current ...
  • 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)
    Conference report
    Open Access
    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
    Restricted access - publisher's policy
    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 ...
  • Heterogeneous QoS resource manager with prediction 

    Nou Castell, Ramon; Torres Viñals, Jordi (IARIA, 2009)
    Conference report
    Open Access
    As long as computers continue to get more CPU processing power, data centers need to optimize their power usage. We can do this and maintain the same complexity level as before by using virtualized environments. We can put ...
  • 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)
    Conference lecture
    Open Access
    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 ...
  • 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)
    Conference report
    Open Access
    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 ...
  • Towards energy-aware scheduling in data centers using machine learning 

    Berral García, Josep Lluís; Goiri Presa, Íñigo; Nou Castell, Ramon; Julià, Ferran; Guitart Fernández, Jordi; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2010-04-15)
    Conference report
    Open Access
    As energy-related costs have become a major economical factor for IT infrastructures and data-centers, companies and the research community are being challenged to nd better and more efficient power-aware resource ...
  • XtreemOS application execution management: a scalable approach 

    Nou Castell, Ramon; Giralt Celiméndiz, Jacobo; Corbalán González, Julita; Tejedor Saavedra, Enric; Fitó, Josep Oriol; Perez, Josep Maria; Cortés Rosselló, Antonio (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference report
    Open Access
    Designing a job management system for the Grid is a non-trivial task. While a complex middleware can give a lot of features, it often implies sacrificing performance. Such performance loss is especially noticeable for ...
  • XtreemOS-MD: Grid computing from mobile devices 

    Martínez, Álvaro; Prieto, Santiago; Gallego, Noé; Nou Castell, Ramon; Giralt, Jacobo; Cortés Rosselló, Antonio (2010-06)
    Conference report
    Open Access
    Grid and Cloud computing are well known topics, and currently one of the focus of many research and commercial projects. Nevertheless, the transparent access to Grid facilities from mobile devices (like PDAs or smartphones) ...