6,150 research outputs found

    A Taxonomy of Workflow Management Systems for Grid Computing

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    With the advent of Grid and application technologies, scientists and engineers are building more and more complex applications to manage and process large data sets, and execute scientific experiments on distributed resources. Such application scenarios require means for composing and executing complex workflows. Therefore, many efforts have been made towards the development of workflow management systems for Grid computing. In this paper, we propose a taxonomy that characterizes and classifies various approaches for building and executing workflows on Grids. We also survey several representative Grid workflow systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the design and engineering similarities and differences of state-of-the-art in Grid workflow systems, but also identifies the areas that need further research.Comment: 29 pages, 15 figure

    Towards security monitoring patterns

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    Runtime monitoring is performed during system execution to detect whether the system’s behaviour deviates from that described by requirements. To support this activity we have developed a monitoring framework that expresses the requirements to be monitored in event calculus – a formal temporal first order language. Following an investigation of how this framework could be used to monitor security requirements, in this paper we propose patterns for expressing three basic types of such requirements, namely confidentiality, integrity and availability. These patterns aim to ease the task of specifying confidentiality, integrity and availability requirements in monitorable forms by non-expert users. The paper illustrates the use of these patterns using examples of an industrial case study

    Modular Software Process Simulation Models Through Metamodeling

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    In this paper we present the main concepts and principles of a multilevel architecture to help in the development of modularized and reusable software process models under the System Dynamics approach. The conceptual ideas of the multilevel architecture have been formalized using UML as a notation. Metamodeling is used to support the process of abstract modules development. The architecture proposed is also based on ISO’s Information Resource Dictionary System. The principles of the architecture and overall guide to develop software process simulation models are described in this work.Ministerio de Ciencia y Tecnología TIN2004-06689-C03-0
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