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Applied parallel computing. State of the art in scientific computing : 8th International Workshop, PARA 2006; Umeå, Sweden, June 2006, Revised Selected Papers
- 2007
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Editorial proceedings (peer-reviewed)abstract
- The Eighth International Workshop on Applied Parallel Computing (PARA 2006) was held in Umeå, Sweden, June 18–21, 2006. The workshop was organized by the High Performance Computing Center North (HPC2N) and the Department of Computing Science at Umeå University. The general theme for PARA 2006 was “State of the Art in Scientific and Parallel Computing.” Topics covered at PARA 2006 included basic algorithms and software for scientific, parallel and grid computing, tools and environments for developing high-performance computing applications, as well as a broad spectrum of applications from science and engineering. The workshop included 7 plenary keynote presentations, 15 invited minisymposia organized in 30 sessions, and 16 sessions of contributed talks. The minisymposia and the contributed talks were held in five to six parallel sessions. The main workshop program was preceded by two half-day tutorials. In total, 205 presentations were held at PARA 2006, by speakers representing 28 countries. Extended abstracts for all presentations were made available at the PARA 2006 Web site (www.hpc2n.umu.se/para06). The reviewing process was performed in two stages for evaluation of originality, appropriateness, and significance. In the first stage, extended abstracts were reviewed for selection of contributions to be presented at the workshop. In the second stage the full papers submitted after the workshop were reviewed. In total, 120 papers were selected for publication in this peer-reviewed post-conference proceedings. A number of people contributed in different regards to the organization and the accomplishment of PARA 2006. First of all the Local Organization Committee did a greatly appreciated and enthusiastic job. We also acknowledge the following people for the assistance and support during the workshop days: Yvonne Löwstedt and Anne-Lie Persson; Niklas Edmundsson, Roger Oscarsson, and Mattias Wadenstein. A special thanks goes to the PARA 2006 secretary, Lena Hellman, to Anders Backman and Björn Torkelsson for designing and managing the PARA 2006Web site including the electronic paper submission system, powered by Commence, and to Mats Nylén and Mikael Rännar for their professional assistance in compiling and editing the PARA 2006 program, the booklet of extended abstracts, and the final proceedings. PARA 2006 would not have been possible without the personal involvement of all these fine people. We also greatly acknowledge all minisymposia organizers, the review coordinators and all the referees for their evaluations in the second review stage, which included several rounds and resulted in these professionally peer-reviewed post-workshop proceedings. Finally, we would also like to thank the sponsoring institutions for their generous financial support. VI Preface Since 1996 the international PARA conferences have become biennial and are organized by one of the Nordic countries. The three first workshops including PARA 1996 and the last PARA 2004 were held in Lyngby, Denmark. The other three, besides this one, were held in Umeå, Sweden (PARA 1998), in Bergen, Norway (PARA 2000), and in Espoo, Finland (PARA 2002). The PARA 2008 workshop will take place in Trondheim, Norway, May 13–16, 2008.
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- Berglund, Ann-Charlotte, et al.
(author)
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Combining local and grid resources in scientific workflows (for Bioinformatics)
- 2009
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Conference paper (peer-reviewed)abstract
- We examine some issues that arise when using both local and Gridresources in scientific workflows. Our previous work addresses and illustratesthe benefits of a light-weight and generic workflow engine that manages andoptimizes Grid resource usage. Extending on this effort, we hereillustrate how a client tool for bioinformatics applications employs the engine tointerface with Grid resources. We also explore how to define data flowsthat transparently integrates local and Grid subworkflows. In addition, the benefits of parameter sweep workflows are examined and a means for describing this type of workflows in an abstract and concise manner is introduced. Finally, the above mechanisms are employed to perform an orthology detection analysis.
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- Eerola, Paula, et al.
(author)
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Roadmap for the ARC Grid Middleware
- 2007
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In: Lecture Notes in Computer Science. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 9783540757542 ; 4699/2007, s. 471-479
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Conference paper (peer-reviewed)abstract
- The Advanced Resource Connector (ARC) or the NorduGrid middleware is an open source software solution enabling production quality computational and data Grids, with special emphasis on scalability, stability, reliability and performance. Since its first release in May 2002, the middleware is deployed and being used in production environments. This paper aims to present the future development directions and plans of the ARC middleware in terms of outlining the software development roadmap.
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- Elmroth, Erik, 1964-, et al.
(author)
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A Grid Resource Broker Supporting Advance Reservations and Benchmark-based Resource Selection
- 2006
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In: Applied Parallel Computing. - Berlin, Heidelberg : Springer Verlag. - 3540290672 - 9783540290674 ; , s. 1061-1070
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Conference paper (peer-reviewed)abstract
- This contribution presents algorithms, methods, and software for a Grid resource manager, responsible for resource brokering and scheduling in early production Grids. The broker selects computing resources based on actual job requirements and a number of criteria identifying the available resources, with the aim to minimize the total time to delivery for the individual application. The total time to delivery includes the time for program execution, batch queue waiting, input/output data transfer, and executable staging. Main features of the resource manager include advance reservations, resource selection based on computer benchmark results and network performance predictions, and a basic adaptation facility.
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- Elmroth, Erik, 1964-, et al.
(author)
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A light-weight Grid workflow execution service enabling client and middleware independence
- 2008
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In: Parallel Processing and Applied Mathematics. - Berlin, Heidelberg : Springer-Verlag. ; , s. 754-761
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Conference paper (peer-reviewed)abstract
- We present a generic and light-weight Grid workflow execution engine made available as a Grid service. A long-term goal is to facilitate the rapid development of application-oriented end-user workflow tools, while providing a high degree of Grid middleware-independence. The workflow engine is designed for workflow execution, independent of client tools for workflow definition. A flexible plugin-structure for middleware-integration provides a strict separation of the workflow execution and the processing of individual tasks, such as computational jobs or file transfers. The light-weight design is achieved by focusing on the generic workflow execution components and by leveraging state-of-the art Grid technology, e.g., for state management. The current prototype is implemented using the Globus Toolkit 4 (GT4) Java WS Core and has support for executing workflows produced by Karajan. It also includes plugins for task execution with GT4 as well as a high-level Grid job management framework.
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- Elmroth, Erik, 1964-, et al.
(author)
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A standards-based Grid resource brokering service supporting advance reservations, coallocation and cross-Grid interoperability
- 2009
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In: Concurrency and Computation. - : Wiley. - 1532-0626 .- 1532-0634. ; 21:18, s. 2298-2335
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Journal article (peer-reviewed)abstract
- The problem of Grid-middleware interoperability is addressed by the design and analysis of a feature-rich, standards-based framework for all-to-all cross-middleware job submission.The architecture is designed with focus on generality and flexibility and builds on extensive use, internally and externally, of (proposed) Web and Grid services standards such asWSRF, JSDL, GLUE, and WS-Agreement. The external use providesthe foundation for easy integration into specific middlewares,which is performed by the design of a small set of plugins for each middleware. Currently, plugins are provided for integrationinto Globus Toolkit 4 and NorduGrid/ARC. The internal use of standard formats facilitates customizationof the job submission service by replacement of custom components for performing specific well-defined tasks.Most importantly, this enables the easy replacement of resource selection algorithms by algorithms that addresses the specific needs of a particular Grid environment and job submission scenario.By default, the service implements a decentralized brokering policy, strivingto optimize the performance for the individual user by minimizing the response time for each job submitted. The algorithms in our implementation perform resource selectionbased on performance predictions, and provide support for advance reservations as well as coallocation of multiple resources for coordinated use.The performance of the system is analyzed with focuson overall service throughput (up to over 250 jobs per minute)and individual job submission response time (down to under one second).
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- Elmroth, Erik, 1964-, et al.
(author)
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A User-Centric Cluster and Grid Computing Portal
- 2009
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In: International Journal of Computational Science and Engineering (IJCSE). - : InderScience Publishers. - 1742-7185 .- 1742-7193. ; 4:2, s. 127-134
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Journal article (peer-reviewed)abstract
- The HPC2N Grid portal is a user-centric environment that provides a homogeneous interface to a set of heterogeneous High-Performance Computing (HPC) resources from standard web-browsers. The interface includes support for most everyday activities, such as to submit, manipulate and delete jobs, monitor queues and job status, obtain user-, project-, and resource information, view job output, etc. This contribution reviews the portal functionalities and presents the design and implementation of the underlying system architecture. Some major design considerations, features and limitations are discussed. The portal currently gives access to all major resources at HPC2N, in total comprising over 700 CPUs.
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- Elmroth, Erik, 1964-, et al.
(author)
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Accounting and Billing for Federated Cloud Infrastructures
- 2009
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In: Proceedings of the Eighth International Conference on Grid and Cooperative Computing (GCC 2009). - : IEEE Computer Society Press. ; , s. 268-275
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Conference paper (peer-reviewed)abstract
- Emerging Cloud computing infrastructures provide computing resources on demand based on postpaid principles. For example, the RESERVOIR project develops an infrastructure capable of delivering elastic capacity that can automatically be increased or decreased in order to cost-efficiently fulfill established Service Level Agreements. This infrastructure also makes it possible for a data center to extend its total capacity by subcontracting additional resources from collaborating data centers, making the infrastructure a federation of Clouds. For accounting and billing, such infrastructures call for novel approaches to perform accounting for capacity that varies over time and for services (or more precisely virtual machines) that migrate between physical machines or even between data centers. For billing, needs arise for new approaches to simultaneously manage postpaid and prepaid payment schemes for capacity that varies over time in response to user needs. In this paper, we outline usage scenarios and a set of requirements for such infrastructures, and propose an accounting and billing architecture to be used within RESERVOIR. Even though the primary focus for this architecture is accounting and billing between resource consumers and infrastructure provides, future support for inter-site billing is also taken into account.
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