[petsc-dev] How to dump matrix in petsc

[Jed Brown]

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.
>
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