Now showing items 1-20 of 25

  • A methodology for full-system power modeling in heterogeneous data centers 

    Canuto, Mauro; Bosch, Raimon; Macías Lloret, Mario; Guitart Fernández, Jordi (Association for Computing Machinery (ACM), 2016)
    Conference lecture
    Open Access
    The need for energy-awareness in current data centers has encouraged the use of power modeling to estimate their power consumption. However, existing models present noticeable limitations, which make them application-dependent, ...
  • Analysis of a trust model for SLA negotiation and enforcement in cloud markets 

    Macías Lloret, Mario; Guitart Fernández, Jordi (Elsevier, 2016-02)
    Article
    Open Access
    Online Reputation Systems help mitigate the information asymmetry between clients and providers in Cloud Computing Markets. However, those systems raise two main drawbacks: the disagreement for assuming the cost of ownership ...
  • A non-additive negotiation model for utility computing markets 

    Macías Lloret, Mario; Guitart Fernández, Jordi (2009-09)
    Conference report
    Open Access
    Market-based resource allocation is a promising model for dealing with the growing Utility Computing environments, such as Grid or Cloud Computing. Agents that represent both service clients and providers meet in a market ...
  • A risk assessment framework for cloud computing 

    Djemame, Karim; Armstrong, Django; Guitart Fernández, Jordi; Macías Lloret, Mario (Institute of Electrical and Electronics Engineers (IEEE), 2016-07-01)
    Article
    Open Access
    Cloud service providers offer access to their resources through formal service level agreements (SLA), and need well-balanced infrastructures so that they can maximise the quality of service (QoS) they offer and minimise ...
  • ASCETiC: adapting service lifeCycle towards efficienT clouds 

    Juan Ferrer, Ana; Garcia Perez, David; Agiatzidou, Eleni; Lordan Gomis, Francesc-Josep; Ejarque, Jorge; Sirvent, Raul; Badia Sala, Rosa Maria; Guitart Fernández, Jordi; Ortiz, David; Macías Lloret, Mario; Deprez, Jean-Christophe; Ponsard, Christophe; Temporale, Christian; Panuccio, Pasquale; Sommacampagna, Davide; Blasi, Lorenzo; Djemame, Karim; Armstrong, Django; Kammer, Michael (SCITEPRESS, 2014-04)
    Part of book or chapter of book
    Restricted access - publisher's policy
    Reducing energy consumption is increasingly gaining attention in the area of Cloud computing, as means to reduce costs and improve corporate sustainability image. ASCETiC is focused on providing novel methods and tools to ...
  • Business-driven resource allocation and management for data centres in cloud computing markets 

    Macías Lloret, Mario (Universitat Politècnica de Catalunya, 2014-05-28)
    Doctoral thesis
    Open Access
    Cloud Computing markets arise as an efficient way to allocate resources for the execution of tasks and services within a set of geographically dispersed providers from different organisations. Client applications and service ...
  • Client classification policies for SLA negotiation and allocation in shared cloud datacenters 

    Macías Lloret, Mario; Guitart Fernández, Jordi (Springer, 2011)
    Conference report
    Open Access
    In Utility Computing business model, the owners of the computing resources negotiate with their potential clients to sell computing power. The terms of the Quality of Service (QoS) to be provided as well as the economic ...
  • 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
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Éranse una vez las computadoras 

    Macías Lloret, Mario (Lulu.com, 2010-10-14)
    Book
    Restricted access - author's decision
  • 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
    Open Access
    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 ...
  • 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)
    Part of book or chapter of book
    Restricted access - publisher's policy
    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 ...
  • 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)
    Part of book or chapter of book
    Open Access
    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, ...
  • Influence of reputation in revenue of grid service providers 

    Macías Lloret, Mario; Guitart Fernández, Jordi (2008-11-21)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Maximising revenue in cloud computing markets by means of economically enhanced SLA management 

    Macías Lloret, Mario; Guitart Fernández, Jordi (2010-09-01)
    External research report
    Open Access
    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
    Restricted access - publisher's policy
    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 ...
  • Performance of the load-in-the-loop single op-amp voltage controlled current source from the op-amp parameters 

    Macías Lloret, Mario; Seoane, F.; Bragós Bardia, Ramon (2010)
    Conference report
    Open Access
    In recent years, Electrical Bioimpedance (EBI) methods have gained importance. These methods are often based on obtaining impedance spectrum in the range of β-dispersion, i.e. from a few kHz up to some MHz. To measure ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference lecture
    Open Access
    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 ...