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A-GWL: Abstract Grid Workflow Language

  • Thomas Fahringer
  • Sabri Pllana
  • Alex Villazon
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3038)

Abstract

Grid workflow applications are emerging as one of the most interesting application classes for the Grid. In this paper we present A-GWL, a novel Grid workflow language to describe the workflow of Grid applications at a high level of abstraction. A-GWL has been designed to allow the user to concentrate on describing scientific Grid applications. The user is shielded from details of the underlying Grid infrastructure. A-GWL is XML-based which defines a graph of activities that refers to computational tasks or user interactions. Activities are connected by control- and data-flow links. We have defined A-GWL to support the user in orchestrating Grid workflow applications through a rich set of constructs including sequence of activities, sub-activities, control-flow mechanisms (sequential flow, exclusive choice, and sequential loops), data-flow mechanisms (input/output ports), and data repositories. Moreover, our work differs from most existing Grid workflow languages by advanced workflow constructs such as parallel execution of activities with pre- and post-conditions, parallel loops, event-based synchronization mechanisms, and property-based selection of activities. In addition, the user can specify high-level constraints and properties for activities and data-flow links.

Keywords

Output Port Parallel Execution Grid Service Grid Application Parallel Loop 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Thomas Fahringer
    • 1
  • Sabri Pllana
    • 2
  • Alex Villazon
    • 1
  1. 1.Institute for Computer ScienceUniversity of InnsbruckInnsbruckAustria
  2. 2.Institute for Software ScienceUniversity of ViennaViennaAustria

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