Comparison of two methods for building astronomical image mosaics on a grid

Daniel S. Katz, Joseph C. Jacob, G. Bruce Berriman, John Good, Anastasia C. Laity, Ewa Deelman, Carl Kesselman, Gurmeet Singh, Mei Hui Su, Thomas A. Prince

Research output: Contribution to journalConference articlepeer-review


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 work/low. 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.

Original languageEnglish (US)
Article number1488681
Pages (from-to)85-94
Number of pages10
JournalProceedings of the International Conference on Parallel Processing Workshops
StatePublished - 2005
Externally publishedYes
EventInternational Conference on Parallel Processing Workshops 2005, ICPP 2005 - Oslo, Norway
Duration: Jun 14 2005Jun 17 2005

ASJC Scopus subject areas

  • General Engineering


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