[petsc-users] Mumps and PTScotch

[Pierre Jolivet]

Hello Anthony,

> On 29 Mar 2022, at 8:07 AM, Anthony Paul Haas <aph at email.arizona.edu> wrote:
> 
> Hello,
> 
> Is PTScotch required when using Petsc with Mumps to solve a (complex) linear system of equations (direct solution)?

SCOTCH is not required when using MUMPS, it’s an optional dependency (odeps), see https://gitlab.com/petsc/petsc/-/blob/c9b04d1e75cd0716fe0f943e5da74654588dc53a/config/BuildSystem/config/packages/MUMPS.py#L49 <https://gitlab.com/petsc/petsc/-/blob/c9b04d1e75cd0716fe0f943e5da74654588dc53a/config/BuildSystem/config/packages/MUMPS.py#L49>.

> The page https://petsc.org/release/docs/manualpages/Mat/MATSOLVERMUMPS.html <https://petsc.org/release/docs/manualpages/Mat/MATSOLVERMUMPS.html> mentions to use the following options for the configuration (see below) but the option "--download-ptscotch" results in the error message "Unable to configure with given options"

Please send configure.log at petsc-maint at mcs.anl.gov <mailto:petsc-maint at mcs.anl.gov>

Thanks,
Pierre

> From https://petsc.org/release/docs/manualpages/Mat/MATSOLVERMUMPS.html <https://petsc.org/release/docs/manualpages/Mat/MATSOLVERMUMPS.html> 
> ./configure --download-mumps --download-scalapack --download-parmetis --download-metis --download-ptscotch
> 
> 
> Thanks,
> 
> Anthony
> 
> 
> 
> 
> 

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