[petsc-users] Writing matrix to file with MPIIO

[Guo, Hanqi]

Yes.  It works without MPIIO.  

-Hanqi

---------------
Hanqi Guo
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 S. Cass Ave., Bldg 240
Argonne, IL 60439
e-mail: hguo at anl.gov
web: http://www.mcs.anl.gov/~hguo
phone: 630-252-7225

> On Feb 28, 2016, at 11:05 AM, Barry Smith <bsmith at mcs.anl.gov> wrote:
> 
> 
>   Does it work without the PetscViewerBinarySetUseMPIIO(viewer, PETSC_TRUE); ?
> 
>  Barry
> 
>> On Feb 27, 2016, at 9:57 PM, Guo, Hanqi <hguo at anl.gov> wrote:
>> 
>> Hi, 
>> 
>> I am trying to write a sparse matrix to file with MPIIO but failed.  I got the same error on vesta (gpfs), my Macbook (local disk), and a linux machine (nfs).  The followings are my code snippet and error output.  Could anyone help me check the code?  Thanks!  
>> 
>> ...
>>    MatCreate(PETSC_COMM_WORLD, &mat);
>>    MatSetType(mat, MATMPIAIJ);
>>    MatSetSizes(mat, PETSC_DECIDE, PETSC_DECIDE, n, n);
>>    MatSetUp(mat);
>> ...
>>    // write matrix
>> ...
>>    MatAssemblyBegin(mat, MAT_FINAL_ASSEMBLY);
>>    MatAssemblyEnd(mat, MAT_FINAL_ASSEMBLY);
>> 
>>    PetscViewer viewer; 
>>    PetscViewerCreate(PETSC_COMM_WORLD, &viewer); 
>>    PetscViewerSetType(viewer, PETSCVIEWERBINARY);
>>    PetscViewerFileSetMode(viewer, FILE_MODE_WRITE);
>>    PetscViewerFileSetName(viewer, "sfm.mat");
>>    PetscViewerBinarySetUseMPIIO(viewer, PETSC_TRUE);
>>    MatView(mat, viewer);
>>    PetscViewerDestroy(&viewer);
>> ...
>> 
>> 
>> [0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
>> [0]PETSC ERROR: Write to file failed
>> [0]PETSC ERROR: Error writing to file total size 4 err -1 wsize 16
>> [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting.
>> [0]PETSC ERROR: Petsc Release Version 3.6.3, Dec, 03, 2015 
>> [0]PETSC ERROR: Unknown Name on a arch-linux2-c-debug named compute001 by hguo Sat Feb 27 21:40:04 2016
>> [0]PETSC ERROR: Configure options —prefix=(hidden) --with-fc=0 --download-f2cblaslapack --with-mpi-dir=(hidden) --with-precision=single
>> [0]PETSC ERROR: #1 PetscBinaryWrite() line 405 in (hidden)/petsc-3.6.3/src/sys/fileio/sysio.c
>> [0]PETSC ERROR: #2 MatView_MPIAIJ_Binary() line 1219 in (hidden)/petsc-3.6.3/src/mat/impls/aij/mpi/mpiaij.c
>> [0]PETSC ERROR: #3 MatView_MPIAIJ_ASCIIorDraworSocket() line 1385 in (hidden)/petsc-3.6.3/src/mat/impls/aij/mpi/mpiaij.c
>> [0]PETSC ERROR: #4 MatView_MPIAIJ() line 1470 in (hidden)/petsc-3.6.3/src/mat/impls/aij/mpi/mpiaij.c
>> [0]PETSC ERROR: #5 MatView() line 886 in (hidden)/petsc-3.6.3/src/mat/interface/matrix.c
>> 
>> 
>> ---------------
>> Hanqi Guo
>> Postdoctoral Appointee
>> Mathematics and Computer Science Division
>> Argonne National Laboratory
>> 9700 S. Cass Ave., Bldg 240
>> Argonne, IL 60439
>> e-mail: hguo at anl.gov
>> web: http://www.mcs.anl.gov/~hguo
>> phone: 630-252-7225
>> 
> 

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