Now showing items 1-20 of 92

    • A GA(TS) hybrid algorithm for scheduling in computational grids 

      Xhafa Xhafa, Fatos; González, Juan A.; Dahal, Keshav P.; Abraham, Ajith (Springer, 2009)
      Conference report
      Open Access
      The hybridization of heuristics methods aims at exploring the synergies among stand alone heuristics in order to achieve better results for the optimization problem under study. In this paper we present a hybridization of ...
    • A game-theoretic and hybrid genetic meta-heuristics model for security-assured scheduling of independent jobs in computational grids 

      Kolodziej, Joana; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      Scheduling independent tasks in Computational Grids commonly arises in many Grid-enabled large scale applications. Much of current research in this domain is focused on the improvement of the efficiency of the Grid schedulers, ...
    • A grid-based approach for processing group activity log files 

      Xhafa Xhafa, Fatos; Caballé Llobet, Santiago; Daradoumis, Thanasis; Zhou, Nan (Springer, 2004)
      Conference report
      Open Access
      The information collected regarding group activity in a collaborative learning environment requires classifying, structuring and processing. The aim is to process this information in order to extract, reveal and provide ...
    • A high-productivity task-based programming model for clusters 

      Tejedor Saavedra, Enric; Farreras Esclusa, Montserrat; Grove, David; Badia Sala, Rosa Maria; Almasi, Gheorghe; Labarta Mancho, Jesús José (2012-12-15)
      Article
      Restricted access - publisher's policy
      Programming for large-scale, multicore-based architectures requires adequate tools that offer ease of programming and do not hinder application performance. StarSs is a family of parallel programming models based on automatic ...
    • A hyper-heuristic for adaptive scheduling in computational grids 

      Xhafa Xhafa, Fatos (2007-01)
      Article
      Open Access
      In this paper we present the design and implementation of an hyper-heuristic for efficiently scheduling independent jobs in computational grids. An efficient scheduling of jobs to grid resources depends on many parameters, ...
    • A parallel grid-based implementation for real-time processing of event log data of collaborative applications 

      Xhafa Xhafa, Fatos; Paniagua, Claudi; Barolli, Leonard; Caballé Llobet, Santiago (2010)
      Article
      Open Access
      Collaborative applications usually register user interaction in the form of semi-structured plain text event log data. Extracting and structuring of data is a prerequisite for later key processes such as the analysis of ...
    • A second-order distributed Trotter–Suzuki solver with a hybrid CPU–GPU kernel 

      Wittek, Peter; Cucchietti, Fernando M. (Elsevier, 2013-04)
      Article
      Open Access
      The Trotter-Suzuki approximation leads to an efficient algorithm for solving the timedependent Schrödinger equation. Using existing highly optimized CPU and GPU kernels, we developed a distributed version of the algorithm ...
    • A Stackelberg game for modelling asymmetric users' behavior in grid scheduling 

      Kolodziej, Joana; Xhafa Xhafa, Fatos; Bogdanski, Marcin (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      In traditional distributed computing the users and owners of the computational resources usually belong to the same administrative domain. Therefore all users are equally entitled to use the resources. The situation is ...
    • A static benchmarking for grid scheduling problems 

      Xhafa Xhafa, Fatos; Barolli, Leonard; Gonzalez S, Juan Antonio; Jura, Pawel (Institute of Electrical and Electronics Engineers (IEEE), 2009)
      Conference report
      Open Access
      Analysis of algorithms for Grid computing systems before deployment in real Grid infrastructures is an important issue in Grid computing domain. Due to the complexity of real Grid systems, assessing performance analysis ...
    • A study on the performance of Oracle Grid Engine for computing intensive applications 

      Kolici, Vladi; Herrero, Albert; Xhafa Xhafa, Fatos; Barolli, Leonard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Open Access
      Computing intensive applications are an important family of applications in distributed computing domain. They have been object of study using different distributed computing paradigms and infrastructures. Such applications ...
    • A Tabu search algorithm for scheduling independent jobs in computational grids 

      Xhafa Xhafa, Fatos; Carretero Casado, Javier Sebastián; Dorronsoro, Bernabé; Alba, Enrique (2009)
      Article
      Open Access
      The efficient allocation of jobs to grid resources is indispensable for high performance grid-based applications, and it is a computationally hard problem even when there are no dependencies among jobs. We present in this ...
    • A web interface for meta-heuristics based grid schedulers 

      Xhafa Xhafa, Fatos; Kolodziej, Joana; Bogdanski, Marcin (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      The use of meta-heuristics for designing efficient Grid schedulers is currently a common approach. One issue related to Grid based schedulers is their evaluation under different Grid configurations, such as dynamics of ...
    • An Architecture for Programming Distributed Applications on Fog to Cloud Systems 

      Lordan Gomis, Francesc-Josep; Lezzi, Daniele; Ejarque, Jorge; Badia Sala, Rosa Maria (Springer, 2018-02-08)
      Conference lecture
      Open Access
      This paper presents a framework to develop and execute applications in distributed and highly dynamic computing systems composed of cloud resources and fog devices such as mobile phones, cloudlets, and micro-clouds. The ...
    • An ILP-based real-time scheduler for distributed and heterogeneous computing environments 

      Sabaté, Eudald; Serrano, Maria A.; Quiñones, Eduardo (Barcelona Supercomputing Center, 2019-05-07)
      Conference report
      Open Access
    • Análisis y explotación de bases de datos de comercio. Aplicación a la ciudad de Barcelona. 

      Hernández Narciso, Angel (Universitat Politècnica de Catalunya, 2014-06)
      Bachelor thesis
      Open Access
      Este proyecto se centra en la ciudad de Barcelona. Busca obtener información sobre la misma, de tal manera que se puedan describir comportamientos en el ámbito comercial. Para ello, se estudian dos bases de datos que ...
    • Aplicaciones paralelas usando sobresuscripción de CPUs en un clúster multicore 

      Sánchez Martínez, Javier (Universitat Politècnica de Catalunya, 2014-09-20)
      Bachelor thesis
      Open Access
      [CASTELLÀ] Este proyecto se centra en la problemática del desbalanceo de carga de una aplicación paralela. Se darán dos propuestas de algoritmos diferentes por tal de realizar un balanceo de carga dinámico mediante una ...
    • C++ simulation in the browser 

      Gascons Gascon, Ricard (Universitat Politècnica de Catalunya, 2017-01)
      Bachelor thesis
      Open Access
      The aim of this thesis is to design, develop and evaluate an open source tool to edit, run and debug C++ code inside a webpage without requiring a remote server to compile and execute the programs. C++ is widely used in ...
    • ClusterMem: Ús de la memòria total d'un cluster 

      Muñoz García, Hèctor (Universitat Politècnica de Catalunya, 2012-01-09)
      Master thesis (pre-Bologna period)
      Open Access
      Aquest projecte tracta de desenvolupar un sistema de swap en xarxa per a sistemes basats en Unix semblant a un DSM que permeti executar programes que demanin més memòria que la disponible físicament mitjançant la agrupació ...
    • Clúster d'ordinadors per estacions base 

      Paños Marín, Albert (Universitat Politècnica de Catalunya, 2011-02-03)
      Bachelor thesis
      Open Access
      Es planteja el desenvolupament d'un cluster d'ordinadors que pugui dur a terme la computació intensiva necessària en una estació base. El computador de base a analitzar es la PS3 utilitzant les eines de programació disponible ...
    • Combing smart grid with community clouds: next generation integrated service platform 

      Sharifi, Leila; Freitag, Fèlix; Veiga, Luis (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Collaboration-based distributed systems are becoming more prevalent these days. Two such systems are Community Clouds, where a large number of anonymous private users share their computational resources within the community, ...