A specification language for execution flow in parallel applications / Uma linguagem para especificação de fluxo de execução em aplicações paralelas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Many distributed and parallel systems allow only a basic task flow, in which the parallel tasks are distributed and their results collected. In some systems the application execution flow gives support to a dependence relationship among tasks, represented by a directed acyclic graph. Even with this model it is not possible to execute in parallel some important applications as, for example, genetic algorithms. Therefore, there is a need for a new specification model with more sophisticated flow controls that allow some kind of iterative processing at the level of task management. The purpose of this work is to present a proposal for a specification language for parallel application execution workflow, which provides new types of control structures and allows the implementation of a broader range of applications. This language is based on XML (eXtensible Markup Language) notation, which provides characteristics like simplicity and flexibility to the proposed language. To evaluate these and other characteristics of the language, it was implemented on the JoiN parallel processing system. Besides allowing the creation and execution of new parallel applications containing task flows with loops and conditional branches, the proposedlanguage was easy to use and did not cause any significant overhead to the parallel system

ASSUNTO(S)

computational grids (computer systems) processamento paralelo (computadores) programação paralela (computação) parallel processing parallel programming fluxo de trabalho workflow

ACESSO AO ARTIGO

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