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I have an interest in being able to run GRASS modules (not this one) in a large cluster HPC environment. However, for most users most of the time, the biggest bang for the buck will be for making it run in parallel on multi-core desktop systems first.
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<div>Michael<br>
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<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">______________________________</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">C. Michael Barton </span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Director, Center for Social Dynamics & Complexity</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Professor of Anthropology, School of Human Evolution & Social Change</span></font></div>
<div><span class="Apple-style-span" style="font-size: 12px; font-family: Helvetica; ">Arizona State University</span></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Tempe, AZ 85287-2402</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">USA</span></font></div>
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<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">voice:<span class="Apple-converted-space"> </span><span class="Apple-tab-span" style="white-space: pre; ">
</span>480-965-6262 (SHESC), 480-727-9746 (CSDC)</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">fax: 480-965-7671(SHESC), 480-727-0709 (CSDC)</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">www: <span class="Apple-tab-span" style="white-space: pre; ">
</span><a href="http://csdc.asu.edu">http://csdc.asu.edu</a>, <a href="http://shesc.asu.edu">
http://shesc.asu.edu</a></span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "></span><a href="http://www.public.asu.edu/~cmbarton">http://www.public.asu.edu/~cmbarton</a></span></font></div>
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<div>On Jan 29, 2013, at 8:01 AM, <<a href="mailto:grass-dev-request@lists.osgeo.org">grass-dev-request@lists.osgeo.org</a>></div>
<div> wrote:</div>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>From:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">Yann Chemin <<a href="mailto:yann.chemin@gmail.com">yann.chemin@gmail.com</a>><br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>Subject:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; "><b>Re: [GRASS-dev] Parallel computing for r.sun</b><br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>Date:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">January 29, 2013 8:01:29 AM MST<br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>To:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">"Newcomb, Doug" <<a href="mailto:doug_newcomb@fws.gov">doug_newcomb@fws.gov</a>><br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>Cc:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">Vandrol Jan <<a href="mailto:jan.vandrol@vsb.cz">jan.vandrol@vsb.cz</a>>,
"<a href="mailto:grass-dev@lists.osgeo.org">grass-dev@lists.osgeo.org</a>" <<a href="mailto:grass-dev@lists.osgeo.org">grass-dev@lists.osgeo.org</a>><br>
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Hi,
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<div>OpenMP first to leverage the actual CPU development routes.</div>
<div>OpenCL second to leverage the actual GPU routes.</div>
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<div>Cheers,</div>
<div>Yann</div>
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<div class="gmail_quote">On 29 January 2013 19:11, Newcomb, Doug<span class="Apple-converted-space"> </span><span dir="ltr"><<a href="mailto:doug_newcomb@fws.gov" target="_blank">doug_newcomb@fws.gov</a>></span><span class="Apple-converted-space"> </span>wrote:<br>
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I would vote for multicore OpenMP/OPENCL. I just purchased an 8 core AMD Vishera MB and CPU combo for under $300US to use at home , which is faster than the 8 core Xeon server system I used to do statewide solar irradiation modeling at work for a 755 Million cell
grid for 365 days (half hour increments) in 2011. With the advances in multicore architecture ( who knows what core densities ARM will bring?) and utilization of the processing elements in video cards, I think you will benefit many more users on going the
multicore route.
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<div>Doug
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<div class="gmail_quote">On Tue, Jan 29, 2013 at 8:05 AM, Ruzicka Jan<span class="Apple-converted-space"> </span><span dir="ltr"><<a href="mailto:jan.ruzicka@vsb.cz" target="_blank">jan.ruzicka@vsb.cz</a>></span><span class="Apple-converted-space"> </span>wrote:<br>
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Dear developers,<br>
<br>
We are planning to rewrite the module r.sun for parallel computation and would like to ask you, which platform is more desired by the GRASS community. To our understanding there are two main ways of development. Either we design it for multi-core desktop systems
that use shared memory (for example with use of OpenMP) or create module for large clusters with use of MPI library.<br>
<br>
Which way do you think would benefit GRASS more?<br>
<br>
Best regards<br>
<span><font color="#888888"><br>
Jan Ruzicka<br>
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<span class="HOEnZb"><font color="#888888">--<span class="Apple-converted-space"> </span><br>
<div>Doug Newcomb</div>
<div>USFWS</div>
<div>Raleigh, NC</div>
<div><a href="tel:919-856-4520%20ext.%2014" value="+19198564520" target="_blank">919-856-4520 ext. 14</a><span class="Apple-converted-space"> </span><a href="mailto:doug_newcomb@fws.gov" target="_blank">doug_newcomb@fws.gov</a></div>
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<div>The opinions I express are my own and are not representative of the official policy of the U.S.Fish and Wildlife Service or Dept. of the Interior. Life is too short for undocumented, proprietary data formats.</div>
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--<span class="Apple-converted-space"> </span><br>
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<div>Yann Chemin<br>
</div>
<div>Researcher@IWMI<br>
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Skype/FB: yann.chemin<br>
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