UNICORE Summit 2013 PDF Download

Author: Valentina Huber
Publisher: Forschungszentrum Jülich
ISBN: 3893369104
Category :
Languages : en
Pages : 107

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Author: Mathilde Romberg
Publisher:
ISBN: 9783893367504
Category :
Languages : en
Pages : 0

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Author: Mathilde Romberg
Publisher: Forschungszentrum Jülich
ISBN: 3893367500
Category :
Languages : en
Pages : 165

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Author: Jun Zhang
Publisher: Forschungszentrum Jülich
ISBN: 3893368256
Category :
Languages : en
Pages : 125

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Author: Armel Ulrich Kemloh Wagoum
Publisher: Forschungszentrum Jülich
ISBN: 3893368655
Category :
Languages : en
Pages : 155

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Author: Sonja Holl
Publisher: Forschungszentrum Jülich
ISBN: 389336949X
Category :
Languages : en
Pages : 207

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Book Description
Scientific workflows have emerged as a key technology that assists scientists with the design, management, execution, sharing and reuse of in silico experiments. Workflow management systems simplify the management of scientific workflows by providing graphical interfaces for their development, monitoring and analysis. Nowadays, e-Science combines such workflow management systems with large-scale data and computing resources into complex research infrastructures. For instance, e-Science allows the conveyance of best practice research in collaborations by providing workflow repositories, which facilitate the sharing and reuse of scientific workflows. However, scientists are still faced with different limitations while reusing workflows. One of the most common challenges they meet is the need to select appropriate applications and their individual execution parameters. If scientists do not want to rely on default or experience-based parameters, the best-effort option is to test different workflow set-ups using either trial and error approaches or parameter sweeps. Both methods may be inefficient or time consuming respectively, especially when tuning a large number of parameters. Therefore, scientists require an effective and efficient mechanism that automatically tests different workflow set-ups in an intelligent way and will help them to improve their scientific results. This thesis addresses the limitation described above by defining and implementing an approach for the optimization of scientific workflows. In the course of this work, scientists’ needs are investigated and requirements are formulated resulting in an appropriate optimization concept. In a following step, this concept is prototypically implemented by extending a workflow management system with an optimization framework, including general mechanisms required to conduct workflow optimization. As optimization is an ongoing research topic, different algorithms are provided by pluggable extensions (plugins) that can be loosely coupled with the framework, resulting in a generic and quickly extendable system. In this thesis, an exemplary plugin is introduced which applies a Genetic Algorithm for parameter optimization. In order to accelerate and therefore make workflow optimization feasible at all, e-Science infrastructures are utilized for the parallel execution of scientific workflows. This is empowered by additional extensions enabling the execution of applications and workflows on distributed computing resources. The actual implementation and therewith the general approach of workflow optimization is experimentally verified by four use cases in the life science domain. All workflows were significantly improved, which demonstrates the advantage of the proposed workflow optimization. Finally, a new collaboration-based approach is introduced that harnesses optimization provenance to make optimization faster and more robust in the future.

Author: Ivo Kabadshow
Publisher: Forschungszentrum Jülich
ISBN: 3893367705
Category :
Languages : en
Pages : 143

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Author: Ivan Kondov
Publisher: Forschungszentrum Jülich
ISBN: 389336899X
Category :
Languages : en
Pages : 335

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Author: Ioannis Caragiannis
Publisher: Springer
ISBN: 3642369499
Category : Computers
Languages : en
Pages : 612

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Book Description
This book constitutes thoroughly refereed post-conference proceedings of the workshops of the 18th International Conference on Parallel Computing, Euro-Par 2012, held in Rhodes Islands, Greece, in August 2012. The papers of these 10 workshops BDMC, CGWS, HeteroPar, HiBB, OMHI, Paraphrase, PROPER, UCHPC, VHPC focus on promotion and advancement of all aspects of parallel and distributed computing.

Author: Roman Wyrzykowski
Publisher: Springer
ISBN: 3642552242
Category : Computers
Languages : en
Pages : 817

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Book Description
This two-volume-set (LNCS 8384 and 8385) constitutes the refereed proceedings of the 10th International Conference of Parallel Processing and Applied Mathematics, PPAM 2013, held in Warsaw, Poland, in September 2013. The 143 revised full papers presented in both volumes were carefully reviewed and selected from numerous submissions. The papers cover important fields of parallel/distributed/cloud computing and applied mathematics, such as numerical algorithms and parallel scientific computing; parallel non-numerical algorithms; tools and environments for parallel/distributed/cloud computing; applications of parallel computing; applied mathematics, evolutionary computing and metaheuristics.