[MPICH] MPI-IO, reading in c++ from fortran generated file

[Stephen Wornom]

Rob Ross wrote:

> Hi Russell,
>
> Sure you can read them, it's just that MPI-IO doesn't have any 
> mechanism for *interpreting* whatever "stuff" fortran is putting in 
> there.

google for David Cronk, he has applied MPI-IO to fortran production 
codes. The attached ppt if from his web site, perhaps he can participate 
in the discussion.
Stephen

>
> Note that there is no standard for unformatted fortran files, so just 
> doing this in MPI-IO would be difficult, especially if one wanted to 
> be able to read an unformatted fortran file from another 
> system/compiler (which people would invariably try to do). Looks like 
> your version of fortran uses the "surround records with byte lengths" 
> system, which is where those 4s and 12s come from.
>
> Regards,
>
> Rob
>
> Russell L. Carter wrote:
>
>> Now that I've looked into it, unformatted fortran files become
>> even more complicated to deal with because of the record header/
>> trailers when implementing collective IO.  Just in case I've
>> missed something, is it true there is no way to read unformatted
>> fortran files with MPI-IO?
>>
>> It's obvious once you think about it, but it would have been nice
>> to have that pointed out in the "Using MPI-2" book.  (Maybe it is?)
>>
>> Thanks,
>> Russell
>>
>

-------------- next part --------------
A non-text attachment was scrubbed...
Name: MPI-IO_SC_2001.ppt
Type: application/vnd.ms-powerpoint
Size: 395776 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/mpich-discuss/attachments/20070424/991c320c/attachment.ppt>