Now showing items 1-20 of 86

  • Accelerating software memory compression on the Cell/B.E. 

    Beltran Querol, Vicenç; Martorell Bofill, Xavier; Torres Viñals, Jordi; Ayguadé Parra, Eduard (2008)
    Conference report
    Restricted access - publisher's policy
    The idea of transparently compressing and decompressing the content of main memory to virtually enlarge their capacity has been previously proposed and studied in the literature. The rationale behind this idea lies in the ...
  • Adaptive distributed mechanism againts flooding network attacks based on machine learning 

    Berral García, Josep Lluís; Poggi Mastrokalo, Nicolas; Alonso López, Javier; Gavaldà Mestre, Ricard; Torres Viñals, Jordi; Parashar, Manish (ACM Press, NY, 2008)
    Conference report
    Restricted access - publisher's policy
    Adaptive techniques based on machine learning and data mining are gaining relevance in self-management and self- defense for networks and distributed systems. In this paper, we focus on early detection and stopping of ...
  • Adaptive MapReduce scheduling in shared environments 

    Polo, Jordà; Becerra Fontal, Yolanda; Carrera Pérez, David; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Steinder, Malgorzata (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Open Access
    In this paper we present a MapReduce task scheduler for shared environments in which MapReduce is executed along with other resource-consuming workloads, such as transactional applications. All workloads may potentially ...
  • Adaptive on-line software aging prediction based on machine learning 

    Alonso López, Javier; Torres Viñals, Jordi; Berral García, Josep Lluís; Gavaldà Mestre, Ricard (IEEE Computer Society Publications, 2010)
    Conference report
    Open Access
    The growing complexity of software systems is resulting in an increasing number of software faults. According to the literature, software faults are becoming one of the main sources of unplanned system outages, and have ...
  • Adaptive scheduling on power-aware managed data-centers using machine learning 

    Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2011)
    External research report
    Open Access
    Energy-related costs have become one of the major economic factors in IT data-centers, and companies and the research community are currently working on new efficient power-aware resource management strategies, also known ...
  • Adaptive scheduling on power-aware managed data-centers using machine learning 

    Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (IEEE Computer Society Publications, 2011)
    Conference report
    Restricted access - publisher's policy
    Energy-related costs have become one of the major economic factors in IT data-centers, and companies and the research community are currently working on new efficient power-aware resource management strategies, also known ...
  • Aeneas: A tool to enable applications to effectively use non-relational databases 

    Cugnasco, Cesare; Hernández, Roger; Becerra Fontal, Yolanda; Torres Viñals, Jordi; Ayguadé Parra, Eduard (Elsevier, 2013)
    Conference report
    Open Access
    Non-relational databases arise as a solution to solve the scalability problems of relational databases when dealing with big data applications. However, they are highly configurable prone to user decisions that can heavily ...
  • A hybrid web server architecture for secure e-business web applications 

    Beltran Querol, Vicenç; Carrera Pérez, David; Guitart Fernández, Jordi; Torres Viñals, Jordi; Ayguadé Parra, Eduard (2005-09)
    Article
    Restricted access - publisher's policy
    Nowadays the success of many e-commerce applications, such as on-line banking, depends on their reliability, robustness and security. Designing a web server architecture that keeps these properties under high loads is a ...
  • ALOJA: a systematic study of Hadoop deployment variables to enable automated characterization of cost-effectiveness 

    Poggi Mastrokalo, Nicolas; Carrera Pérez, David; Call, Aaron; Mendoza, Sergio; Becerra Fontal, Yolanda; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Gagliardi, Fabrizio; Labarta Mancho, Jesús José; Reinauer, Rob; Vujic, Nikola; Green, Daron; Blakeley, Jose (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Open Access
    This article presents the ALOJA project, an initiative to produce mechanisms for an automated characterization of cost-effectiveness of Hadoop deployments and reports its initial results. ALOJA is the latest phase of a ...
  • A methodology for Spark parameter tuning 

    Gounaris, Anastasios; Torres Viñals, Jordi (2017-05-19)
    Article
    Open Access
    Spark has been established as an attractive platform for big data analysis, since it manages to hide most of the complexities related to parallelism, fault tolerance and cluster setting from developers. However, this comes ...
  • An integer linear programming representation for data-center power-aware management 

    Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2010-11-12)
    External research report
    Open Access
    This work exposes how to represent a grid data-center based scheduling problem, taking the advantages of the virtualization and consolidation techniques, as a linear integer programming problem including all three mentioned ...
  • A Survey on Performance Management for Internet Applications 

    Guitart Fernández, Jordi; Torres Viñals, Jordi; Ayguadé Parra, Eduard (2010-01-01)
    Article
    Restricted access - publisher's policy
    Internet applications have become indispensable for many business and personal processes, turning the performance of these applications into a key issue. For this reason, recent research has comprehensively explored ...
  • Automatic query driven data modelling in Cassandra 

    Hernandez, Roger; Becerra Fontal, Yolanda; Torres Viñals, Jordi; Ayguadé Parra, Eduard (Barcelona Supercomputing Center, 2015-05-05)
    Conference report
    Open Access
    Non-relational databases have recently been the preferred choice when it comes to dealing with Big Data challenges, but their performance is very sensitive to the chosen data organisations. We have seen differences of ...
  • Automatic query driven data modelling in cassandra 

    Hernández, Roger; Becerra Fontal, Yolanda; Torres Viñals, Jordi; Ayguadé Parra, Eduard (Elsevier, 2015)
    Conference report
    Open Access
    Non-relational databases have recently been the preferred choice when it comes to dealing with BigData challenges, but their performance is very sensitive to the chosen data organisations. We have seen differences of over ...
  • BIGNASim: a NoSQL database structure and analysis portal for nucleic acids simulation data 

    Hospital, Adam; Andrio, Pau; Cugnasco, Cesare; Codo, Laia; Becerra Fontal, Yolanda; Dans, Pablo D.; Battistini, Federica; Torres Viñals, Jordi; Goñi, Ramon; Orozco, Modesto; Gelpí, Josep Lluís (2016-01-04)
    Article
    Open Access
    Molecular dynamics simulation (MD) is, just behind genomics, the bioinformatics tool that generates the largest amounts of data, and that is using the largest amount of CPU time in supercomputing centres. MD trajectories ...
  • BSC contributions in energy-aware resource management for large scale distributed systems 

    Valero Cortés, Mateo; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Carrera Pérez, David; Guitart Fernández, Jordi; Beltran Querol, Vicenç; Becerra Fontal, Yolanda; Badia Sala, Rosa Maria; Labarta Mancho, Jesús José (2010)
    Conference report
    Open Access
    This paper introduces the work being carried out at Barcelona Supercomputing Center in the area of Green Computing. We have been working in resource management for a long time and recently we included the energy parameter ...
  • Building green cloud services at low cost 

    Berral García, Josep Lluís; Goiri, Iñigo; Nguyen, Thu D.; Gavaldà Mestre, Ricard; Torres Viñals, Jordi; Bianchini, Ricardo (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference lecture
    Open Access
    Interest in powering datacenters at least partially using on-site renewable sources, e.g. solar or wind, has been growing. In fact, researchers have studied distributed services comprising networks of such “green” datacenters, ...
  • CellMT: A cooperative multithreading library for the Cell/B.E. 

    Beltran Querol, Vicenç; Carrera Pérez, David; Torres Viñals, Jordi; Ayguadé Parra, Eduard (IEEE Computer Society Publications, 2009-12-16)
    Conference report
    Open Access
    The Cell BE processor has proved that heterogeneous multi-core systems can provide a huge computational power with high efficiency for a wide range of applications. The simple design of the computational units and the use ...
  • Characterizing cloud federation for enhancing providers' profit 

    Goiri Presa, Íñigo; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010)
    Conference report
    Open Access
    Cloud federation has been proposed as a new paradigm that allows providers to avoid the limitation of owning only a restricted amount of resources, which forces them to reject new customers when they have not enough local ...
  • Checkpoint-based Fault-tolerant Infrastructure for Virtualized Service Providers 

    Goiri Presa, Íñigo; Julià, Ferran; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010-04-23)
    Conference report
    Open Access
    Crash and omission failures are common in service providers: a disk can break down or a link can fail anytime. In addition, the probability of a node failure increases with the number of nodes. Apart from reducing the ...