Re: [OMPI users] Questions on MPI I/O and ompi_info

2014-02-14 Thread Jeff Squyres (jsquyres)
On Feb 13, 2014, at 7:30 PM, Ralph Castain wrote: > Hmmm...well, a little digging says that we probably didn't do this as > thoroughly as we should have :-/ Actually, it works exactly as we designed it... but the reasons for doing so (and its effects) are a bit obscure.

Re: [OMPI users] Questions on MPI I/O and ompi_info

2014-02-13 Thread Ralph Castain
Hmmm...well, a little digging says that we probably didn't do this as thoroughly as we should have :-/ Basically, the "MPI I/O Support" line is tied solely to the disable-mpi-io flag. In the 1.6 series, you only had one option for MPI I/O support, and that was romio. So if you disable romio,

[OMPI users] Questions on MPI I/O and ompi_info

2014-02-13 Thread Blosch, Edwin L
Why does ompi_info -c say "MPI I/O Support: yes" even though I configured using -disable-io-romio? If ompi_info is going to tell me MPI I/O is supported, then shouldn't I expect my test program (attached) to work correctly? (it doesn't). I didn't disable "built-in" mpi-io, only io-romio.