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From: Rainer Keller (keller_at_[hidden])
Date: 2007-01-08 14:17:01

Hello Tom,
like MPIch2, Open MPI also uses ROMIO as underlying MPI-IO implementation as
an mca. ROMIO implements the native datarep.

With best regards,

On Friday 05 January 2007 20:38, lund_at_[hidden] wrote:
> Hi,
> I am attempting to use the 'external32' data representation in order
> read and write portable data files. I believe I understand how to do
> this, but I receive the following run-time error from the
> mpi_file_set_view call:
> MPI_FILE_SET_VIEW (line 118): **unsupporteddatarep
> If I replace 'external32' with 'native' in the mpi_file_set_view call then
> everything works, but the data file is written in little endian order on
> my Opteron cluster. Just for grins I also tried 'internal' but this
> produces the unsupporteddatarep error as well.
> Is the 'external32' data type implemented? Do I need to do something else
> to access it? I looked in the FAQs as well as the mailing list archives
> but I can not seem to find any threads discussing this issue. I would
> greatly appreciate any advice.
> I have attached my sample fortran codes (explicit_write.f,
> explicit_read.f, Makefkile) as well as the config.log, output of
> ompi_info, and my environment variable settings. I am running Fedora Core
> 4 with the 2.6.17-1.2142_FC4smp kernel.
> Thanks,
> ---Tom

Dipl.-Inf. Rainer Keller
 High Performance Computing       Tel: ++49 (0)711-685 6 5858
   Center Stuttgart (HLRS)           Fax: ++49 (0)711-685 6 5832
 POSTAL:Nobelstrasse 19                 email: keller_at_[hidden]     
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