Abstract

This paper compares two methods for running an application composed of a set of modules on a grid. The set of modules (collectively called Montage) generates large astronomical image mosaics by composing multiple small images. The workflow that describes a particular run of Montage can be expressed as a directed acyclic graph (DAG), or as a short sequence of parallel (MPI) and sequential programs. In the first case, Pegasus can be used to run the workflow. In the second case, a short shell script that calls each program can be run. In this paper, we discuss the Montage modules, the workflow run for a sample job, and the two methods of actually running the workflow. We examine the run time for each method and compare the portions that differ between the two methods.

Date

2005

Authors

Daniel S Katz, Joseph C Jacob, Ewa Deelman, Carl Kesselman, Gurmeet Singh, Mei-Hui Su, GB Berriman, J Good, AC Laity, Thomas A Prince

Conference

2005 International Conference on Parallel Processing Workshops (ICPPW'05)

Pages

85-94

Publisher

IEEE