DocumentCode :
1564767
Title :
A comparison of two methods for building astronomical image mosaics on a grid
Author :
Katz, Daniel S. ; Jacob, Joseph C. ; Deelman, Ewa ; Kesselman, Carl ; Singh, Gurmeet ; Su, Mei-Hui ; Berriman, G. Bruce ; Good, John ; Laity, Anastasia C. ; Prince, Thomas A.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasdena, CA, USA
fYear :
2005
Firstpage :
85
Lastpage :
94
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.
Keywords :
astronomical atlases; astronomical catalogues; astronomy computing; directed graphs; grid computing; image segmentation; message passing; MPI; Montage modules; Pegasus; astronomical image mosaic; directed acyclic graph; grid modules set; multiple small images; parallel programs; sequential programs; shell script; Application software; Astronomy; Information analysis; Jacobian matrices; Laboratories; Marine technology; Parallel processing; Propulsion; Space technology; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Parallel Processing, 2005. ICPP 2005 Workshops. International Conference Workshops on
ISSN :
1530-2016
Print_ISBN :
0-7695-2381-1
Type :
conf
DOI :
10.1109/ICPPW.2005.6
Filename :
1488681
Link To Document :
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