[GRASS-dev] parallelizing GRASS modules

Barton Michael c.michael.barton at gmail.com
Sat Dec 3 16:07:06 EST 2011

I lost the previous thread but wanted to respond to your question about which modules might benefit from speedup.

In our recursive landscape evolution module (r.landscape.evol.py), the two GRASS modules that take the most time are r.watershed, r.stats, and r.walk, especially r.watershed and r.stats since we need to run these every model cycle. 

The speedup of r.watershed of a few years back made an enormous difference in our model run times. But it is still time consuming on landscapes with large numbers of cells. If parallelization could speed this up, it would be great. I'm not sure that r.stats can be parallelized or not, but speedup would be helpful.

C. Michael Barton
Director, Center for Social Dynamics & Complexity 
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

voice: 	480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax:          480-965-7671 (SHESC),  480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu

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