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Dear all,<br>
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Very sorry to flood the mailing list, one final post because the
image will not come through if you're on digest or using plain
text.<br>
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Thank you for maintaining this wonderful software and this user
mailing list!<br>
<br>
I am attempting to use an additive Schwartz preconditioner with
multiple blocks per processor. I've been able to get it to work
with one block per processor but not been successful with
multiple. I believe I am not understanding correctly the
construction of index sets for this case.<br>
<br>
Let's consider a simple example: 16 nodes on a square with 4
blocks of 4x4:<br>
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<img alt="Image" src="cid:part1.03050008.06030809@nasa.gov"
height="272" width="272"><br>
<br>
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<br>
<br>
I want to put Omega_1 and Omega_2 on processor 1 and the other
two on the second processor. Do I make my index sets on
processor 1 <br>
<br>
IS = { {1,2,3,5,6,7,9,10,11}, {2,3,4,6,7,8,10,11,12} }<br>
IS_LOCAL = { {1,2,5,6}, {3,4,7,8} }<br>
<br>
and similarly for the other processor? I tried this and it
isn't quite working out. Do I misunderstand something?<br>
<br>
Thank you!<br>
<br>
Best regards,<br>
Justin<br>
<br>
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---------------------------------------------<br>
Justin Droba, PhD<br>
Applied Aeroscience and CFD Branch (EG3)<br>
NASA Lyndon B. Johnson Space Center<br>
JETS/Jacobs Technology, Inc. and HX5, LLC<br>
<br>
<b>Office:</b> Building 16, Room 142<br>
<b>Phone</b>: 281-483-1451<br>
---------------------------------------------<br>
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