[petsc-users] RAW binary write

[Lisandro Dalcin]

Use PetscViewerBinarySetSkipHeader(viewer, PETSC_TRUE) before VecView().

On Thu, 29 Nov 2018 at 18:50, Sal Am via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Is there a way to write the solution from the system Ax=b in raw binary
> instead of PETSc binary format?
>
> Currently I am doing:
>   ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,
> "../../python/petscpy/Vector_x_petsc.dat", FILE_MODE_WRITE,
> &viewer);CHKERRQ(ierr);
>   ierr = VecView(x,viewer);CHKERRQ(ierr);CHKERRQ(ierr);
>   ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr);
>
> And then use PetscBinaryIO to read it back and save it using
> write('newformat', 'wb') to get to raw... however this approach is not good
> it seems as there are some troubles with little/big endian when using the
> resulting converted file on other systems for post-processing.
>
> Thanks,
>


-- 
Lisandro Dalcin
============
Research Scientist
Computer, Electrical and Mathematical Sciences & Engineering (CEMSE)
Extreme Computing Research Center (ECRC)
King Abdullah University of Science and Technology (KAUST)
http://ecrc.kaust.edu.sa/

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