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Jed, Matt,<br>
<br>
Ok, I see. Perhaps it was bad idea to play around with ILU for my
problems...<br>
<br>
Regards,<br>
Alexander<br>
<br>
On 09.12.2011 17:16, Matthew Knepley wrote:
<blockquote
cite="mid:CAMYG4Gm3RNYjvX2X_SjcC8G8H6j3gYBmNCVBbUd+9-b38QMnDA@mail.gmail.com"
type="cite">On Fri, Dec 9, 2011 at 10:06 AM, Alexander Grayver <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:agrayver@gfz-potsdam.de">agrayver@gfz-potsdam.de</a>></span>
wrote:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"> 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
moz-do-not-send="true"
href="mailto:agrayver@gfz-potsdam.de" target="_blank">agrayver@gfz-potsdam.de</a>></span>
wrote:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin: 0pt 0pt
0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;"> Hello,<br>
<br>
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>
</blockquote>
<div><br>
</div>
<div><a moz-do-not-send="true"
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>
<div><br>
</div>
<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: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
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<blockquote type="cite">
<div class="gmail_quote">
<div> Matt</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin: 0pt 0pt
0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;"> Regards,<br>
Alexander<br>
</blockquote>
</div>
<br>
<br clear="all">
<span class="HOEnZb"><font color="#888888">
<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>
</font></span></blockquote>
<br>
</div>
</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>
</blockquote>
<br>
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