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On 30.11.2011 16:22, Matthew Knepley wrote:
<blockquote
cite="mid:CAMYG4GmvZ9RfiN-DCYUHw+gdLueVYPrxUrOYxP+AG7JfSRokJQ@mail.gmail.com"
type="cite">On Wed, Nov 30, 2011 at 9:10 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"> I'm not sure that
MAT(S)BAIJ is what I need. My matrix symmetric, but not
block. <br>
Well, I solve vector equations and there are 2-3 blocks
(depending on the problem dimension), but this blocks
normaly have size of > 10^5. So which block size should I
specify to be efficient?<br>
</div>
</blockquote>
<div><br>
</div>
<div>Just use 1.</div>
</div>
</blockquote>
<br>
And for d_nz/o_nz also 1? <br>
<br>
<blockquote
cite="mid:CAMYG4GmvZ9RfiN-DCYUHw+gdLueVYPrxUrOYxP+AG7JfSRokJQ@mail.gmail.com"
type="cite">
<div class="gmail_quote">
<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;">
<div bgcolor="#ffffff" text="#000000"> Regards,<br>
Alexander<br>
<br>
On 30.11.2011 14:27, Alexander Grayver wrote:
<blockquote type="cite"> Thanks Matt!<br>
<br>
Regards,<br>
Alexander<br>
<br>
On 30.11.2011 14:16, Matthew Knepley wrote:
<blockquote type="cite">On Wed, Nov 30, 2011 at 3:43 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>
I'm trying to use mumps through PETSc now with
symmetric matrix and cholesky factorization.<br>
When I use it directly I fill up only upper part of
the matrix and set mumid%SYM = 2. Is that possible
to follow same way with petsc?<br>
Which options do I have to choose?<br>
</blockquote>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MATSBAIJ.html"
target="_blank">http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MATSBAIJ.html</a></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;"> Thanks in advance.<br>
<br>
Regards,<br>
<font color="#888888"> Alexander<br>
</font></blockquote>
</div>
<br>
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<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>
</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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