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From: Brian Barrett (brbarret_at_[hidden])
Date: 2005-08-18 18:07:09


On Aug 18, 2005, at 5:34 PM, David Daniel wrote:

> On Aug 18, 2005, at 4:24 PM, Brian Barrett wrote:
>
>> On Aug 18, 2005, at 4:53 PM, David Daniel wrote:
>>
>>> A question for those who did the ROMIO port...
>>>
>>> The ROMIO component seems to be based on version 1.2.5.1 (the last
>>> version of ROMIO released independently). Did anyone make any
>>> progress using the ROMIO from later MPICH's (version 1.2.6 etc.)?
>>> Seems to me these are fairly broken as far as compatibility with
>>> other MPIs is concerned.
>>
>> Yes, we took the last stable individual release of ROMIO for OMPI.
>> We haven't looked at bringing in the MPICH-integrated releases. I'm
>> not sure how hard it will be to rip out the MPICH-specific stuff from
>> ROMIO, but at this point, it would take some work to replicate
>> everything we did to integrate ROMIO into OMPI. Is this a 1.0
>> requirement?
>
> No -- Don't panic! The parallel I/O folks here are just interested in
> seeing whether there are fixes in later versions that would help with
> performance.
>
> I was trying to port 1.2.6 into LA-MPI but it is painful (i.e.
> broken) with an MPI implementation that doesn't have MPI_Info
> defined. My guess is it will be easier with Open MPI.

Ok. It's something we're half looking at for 1.0, but it's going to
be really tight on schedule. Realistically, probably wouldn't fit in
the schedule for the 1.0 release, but would be doable for a SC release.

Brian

-- 
   Brian Barrett
   Open MPI developer
   http://www.open-mpi.org/