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Subject: Re: [OMPI users] MPIIO max record size
From: Eric Chamberland (Eric.Chamberland_at_[hidden])
Date: 2013-05-22 11:21:01


I have experienced the same problem.. and worst, I have discovered a bug
in MPI I/O...

look here:
http://trac.mpich.org/projects/mpich/ticket/1742

and here:

http://www.open-mpi.org/community/lists/users/2012/10/20511.php

Eric

On 05/21/2013 03:18 PM, Tom Rosmond wrote:
> Hello:
>
> A colleague and I are running an atmospheric ensemble data assimilation
> system using MPIIO. We find that if for an individual
> MPI_FILE_READ_AT_ALL the block of data read exceeds 2**31 elements, the
> program fails. Our application is 32 bit fortran (Intel), so we
> certainly can see why this might be expected. Is this the case? We
> have a workaround by doing multiple reads from the file while moving the
> file view, so it isn't a serious problem.
>
> Thanks for any advice or suggestions
>
> T. Rosmond
>
>
>
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