• 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
    Accés obert
    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)
    Capítol de llibre
    Accés restringit per política de l'editorial
    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 ...
  • 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)
    Text en actes de congrés
    Accés obert
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...
  • 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 ...
  • 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 ...
  • TANGO: Transparent heterogeneous hardware Architecture deployment for eNergy Gain in Operation 

    Djemame, Karim; Armstrong, Django; Kavanagh, Richard; Deprez, Jean-Christophe; Ferrer, Ana J.; García-Perez, David; Badia, Rosa M.; Sirvent, Raul; Ejarque, Jorge; Georgiou, Yiannis (2016-03-04)
    Altres
    Accés obert
    The paper is concerned with the issue of how software systems actually use Heterogeneous Parallel Architectures (HPAs), with the goal of optimizing power consumption on these resources. It argues the need for novel methods ...
  • Towards an energy-aware framework for application development and execution in heterogeneous parallel architectures 

    Djemame, Karim; Kavanagh, Richard; Kelefouras, Vasilios; Aguilà, Adrià; Ejarque, Jorge; Badia Sala, Rosa Maria; García-Pérez, David; Pezuela, Clara; Deprez, Jean-Christophe; Guedria, Lofti; De Landtsheer, Renaud; Georgiou, Yiannis (Springer, 2019)
    Capítol de llibre
    Accés restringit per política de l'editorial
    The Transparent heterogeneous hardware Architecture deployment for eNergy Gain in Operation (TANGO) project’s goal is to characterise factors which affect power consumption in software development and operation for ...