On Fri, Dec 9, 2011 at 10:06 AM, Alexander Grayver <span dir="ltr"><<a href="mailto:agrayver@gfz-potsdam.de">agrayver@gfz-potsdam.de</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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On 09.12.2011 16:58, Matthew Knepley wrote:
<blockquote type="cite">On Fri, Dec 9, 2011 at 9:44 AM, Alexander Grayver <span dir="ltr"><<a href="mailto:agrayver@gfz-potsdam.de" target="_blank">agrayver@gfz-potsdam.de</a>></span>
wrote:<br>
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Hello,<br>
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Sorry for dummy question, but what are options for parallel
ILU in petsc? Which packages are best for big sparse matrices
(>= 10^6)?<br>
Where do I start from?<br>
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<div><a href="http://www.mcs.anl.gov/petsc/petsc-dev/docs/linearsolvertable.html" target="_blank">http://www.mcs.anl.gov/petsc/petsc-dev/docs/linearsolvertable.html</a> </div>
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<div>I generally recommend against parallel ILU, but Hypre has
it.</div></div></blockquote>
Why?<br></div></blockquote><div><br></div><div>Its fundamentally not scalable, has unpredictable performance, and in my experience worse than sparse direct.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<div> Matt</div>
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Regards,<br>
Alexander<br>
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-- <br>
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to
which their experiments lead.<br>
-- Norbert Wiener<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener<br>