[petsc-dev] How to dump matrix in petsc

[Dave Nystrom]

Thanks.

Jed Brown writes:
 > src/ksp/ksp/examples/tutorials/ex10.c
 > 
 > On Fri, Jun 15, 2012 at 8:20 AM, Dave Nystrom <dnystrom1 at comcast.net> wrote:
 > 
 > > Jed Brown writes:
 > >  > On Sun, Jun 10, 2012 at 10:07 AM, Dave Nystrom <dnystrom1 at comcast.net
 > > >wrote:
 > >  >
 > >  > > Is there an easy way to dump a matrix and rhs in petsc?  I have a
 > >  > > particular
 > >  > > system that has been challenging to solve with petsc other than using
 > >  > > direct
 > >  > > solves.  Also, if I could dump the linear system, is it acceptable to
 > > post
 > >  > > it
 > >  > > on this email list so that someone who knows more about petsc and
 > > linear
 > >  > > solvers could investigate it if they had the time and inclination?
 > >  > >
 > >  >
 > >  > Run with -ksp_view_binary (it produces a file called 'binaryoutput')
 > >  >
 > >  > Don't email large files to the list. You can send up to a few MB to
 > >  > petsc-maint. If you can't host larger files yourself, anonymous ftp to
 > >  > ftp.mcs.anl.gov, cd incoming, and upload the file (preferably with a
 > > unique
 > >  > name), then tell us the file name.
 > >
 > > Once I have my 'binaryoutput' file, is there a petsc example that shows how
 > > to read this file back into petsc and use it?  I'm not finding online
 > > documentation about this option.
 > >