Exploració per autor "Carrera Pérez, David"Més informació

Ara es mostren els items 39-58 de 60

    • Next stop 'NoOps': enabling cross-system diagnostics through graph-based composition of logs and metrics 

      Zasadzinski, Michal; Solé Simó, Marc; Brandon, Alvaro; Muntés Mulero, Victor; Carrera Pérez, David (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      Performing diagnostics in IT systems is an increasingly complicated task, and it is not doable in satisfactory time by even the most skillful operators. Systems and their architecture change very rapidly in response to ...

    • On the use of social trajectory-based clustering methods for public transport optimization 

      Nin Guerrero, Jordi; Carrera Pérez, David; Villatoro, Daniel (2014)
      Article
      Accés obert
      Public transport optimisation is becoming everyday a more di cult and challenging task, because of the increasing number of transportation options as well as the exponential increase of users. Many research contributions ...

    • Performance characterization of spark workloads on shared NUMA Systems 

      Baig, Shuja-ur-Rehman; Amaral, Marcelo; Polo Cantero, José; Carrera Pérez, David (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      As the adoption of Big Data technologies becomes the norm in an increasing number of scenarios, there is also a growing need to optimize them for modern processors. Spark has gained momentum over the last few years among ...

    • Performance characterization of video analytics workloads in heterogeneous edge infrastructures 

      Rivas Barragan, Daniel; Guim Bernat, Francesc; Polo Bardés, Jorda; Carrera Pérez, David (Wiley (John Wiley & Sons), 2023-06-25)
      Article
      Accés obert
      Powered by deep learning, video analytic applications process millions of camera feeds in real-time to extract meaningful information from their surroundings. And this number grows by the minute. To avoid saturating the ...

    • Performance evaluation of data-centric workloads in serverless environments 

      Nestorov, Anna Maria; Polo Bardés, Jorda; Misale, Claudia; Carrera Pérez, David; Youssef, Alaa (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      Serverless computing is a cloud-based execution paradigm that allows provisioning resources on-demand, freeing developers from infrastructure management and operational concerns. It typically involves deploying workloads ...

    • Performance evaluation of microservices architectures using containers 

      Amaral, Marcelo; Polo Bardés, Jordà; Carrera Pérez, David; Mohomed, Iqbal; Unuvar, Merve; Steinder, Malgorzata (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés obert
      Microservices architecture has started a new trend for application development for a number of reasons: (1) to reduce complexity by using tiny services; (2) to scale, remove and deploy parts of the system easily; (3) to ...

    • Performance impact of the grid middleware 

      Carrera Pérez, David; Guitart Fernández, Jordi; Beltran Querol, Vicenç; Torres Viñals, Jordi; Ayguadé Parra, Eduard (American Scientific Publishers, 2006-01)
      Capítol de llibre
      Accés obert
      The Open Grid Services Architecture (OGSA) defines a new vision of the Grid based on the use of Web Services (Grid Services). The standard interfaces, behaviors and schemes that are consistent with the OGSA specification ...

    • Real-time data center's telemetry reduction and reconstruction using Markov chain models 

      Baig, Shuja-ur-Rehman; Iqbal, Waheed; Berral García, Josep Lluís; Erradi, Abdelkarim; Carrera Pérez, David (2019-12)
      Article
      Accés obert
      Large-scale data centers are composed of thousands of servers organized in interconnected racks to offer services to users. These data centers continuously generate large amounts of telemetry data streams (e.g., hardware ...

    • Resource management for software defined data centers for heterogeneous infrastructures 

      Carneiro do Amaral, Marcelo; Carrera Pérez, David (Barcelona Supercomputing Center, 2015-05-05)
      Text en actes de congrés
      Accés obert
      Software Defined Data Center (SDDC) provides more resource management flexibility since everything is defined as a software, including the network as Software Defined Network (SDN).Typically, cloud providers overlook ...

    • Sequence-to-sequence models for workload interference prediction on batch processing datacenters 

      Buchaca Prats, David; Marcual Medina, Joan; Berral García, Josep Lluís; Carrera Pérez, David (Elsevier, 2020-09)
      Article
      Accés obert
      Co-scheduling of jobs in data centers is a challenging scenario where jobs can compete for resources, leading to severe slowdowns or failed executions. Efficient job placement on environments where resources are shared ...

    • Si elimino el examen, ¿cómo evalúo?: Una discusión sobre las actividades sustitutivas del examen y su escalabilidad 

      López Álvarez, David; Carrera Pérez, David (2016-09)
      Article
      Accés obert
      Se ha discutido mucho sobre los inconvenientes de los exámenes, siendo criticados en ocasiones por fomentar el aprendizaje superficial. Aunque muchos profesores estemos de acuerdo, nos preguntamos ¿por qué actividades se ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • SLA-driven adaptive resource management for web applications on a heterogeneous compute cloud 

      Iqbal, Waheed; Dailey, Matthew; Carrera Pérez, David (Springer Verlag, 2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Current service-level agreements (SLAs) offered by cloud providers make guarantees about quality attributes such as availability. However, although one of the most important quality attributes from the perspective of the ...

    • Spark deployment and performance evaluation on the MareNostrum supercomputer 

      Tous Liesa, Rubén; Gounaris, Anastasios; Tripiana, Carlos; Torres Viñals, Jordi; Girona Turell, Sergi; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José; Becerra Fontal, Yolanda; Carrera Pérez, David; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés obert
      In this paper we present a framework to enable data-intensive Spark workloads on MareNostrum, a petascale supercomputer designed mainly for compute-intensive applications. As far as we know, this is the first attempt to ...

    • Speeding up distributed MapReduce applications using hardware accelerators 

      Becerra Fontal, Yolanda; Beltran Querol, Vicenç; Carrera Pérez, David; González Tallada, Marc; Torres Viñals, Jordi; Ayguadé Parra, Eduard (2009-09)
      Text en actes de congrés
      Accés obert
      In an attempt to increase the performance/cost ratio, large compute clusters are becoming heterogeneous at multiple levels: from asymmetric processors, to different system architectures, operating systems and networks. ...

    • The state of SQL-on-Hadoop in the cloud 

      Poggi, Nicolas; Berral García, Josep Lluís; Fenech, Thomas; Carrera Pérez, David; Blakeley, Jose; Minhas, Umar F.; Vujic, Nikola (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Managed Hadoop in the cloud, especially SQL-on-Hadoop, has been gaining attention recently. On Platform-as-a-Service (PaaS), analytical services like Hive and Spark come preconfigured for general-purpose and ready to use. ...

    • Towards automatic model specialization for edge video analytics 

      Rivas Barragan, Daniel; Guim Bernat, Francesc; Polo Bardés, Jorda; Silva, Pubudu Madhawa; Berral García, Josep Lluís; Carrera Pérez, David (Elsevier, 2022-09)
      Article
      Accés obert
      The number of cameras deployed to the edge of the network increases by the day, while emerging use cases, such as smart cities or autonomous driving, also grow to expect images to be analyzed in real-time by increasingly ...

    • Tuning dynamic web applications using fine-grain analysis 

      Guitart Fernández, Jordi; Carrera Pérez, David; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José (Institute of Electrical and Electronics Engineers (IEEE), 2005)
      Text en actes de congrés
      Accés obert
      In this paper we present a methodology to analyze the behavior and performance of Java application servers using a performance analysis framework. This framework, considers all levels involved in the application server ...

    • Utitily-based placement of dynamic Web applications with fairness goals 

      Carrera Pérez, David; Steinder, Malgorzata; Whalley, Ian; Torres Viñals, Jordi; Ayguadé Parra, Eduard (2008)
      Text en actes de congrés
      Accés obert
      We study the problem of dynamic resource allocation to clustered Web applications. We extend application server middleware with the ability to automatically decide the size of application clusters and their placement on ...

    • Viabilidad y escalabilidad de actividades substitutivas del examen: un caso práctico 

      López Álvarez, David; Carrera Pérez, David (Universidad de Almería, 2016-07-06)
      Comunicació de congrés
      Accés obert
      Se ha discutido mucho sobre los inconvenientes de los exámenes, siendo criticados en ocasiones por fomentar el aprendizaje superficial. Aunque muchos profesores estemos de acuerdo, nos preguntamos ¿por qué actividades se ...