I'm not sure if by "open-pal" you mean "opal" (Open Portability Access Layer) ?
If you search open-mpi page for opal you will get several hits.
On Tue, Mar 3, 2009 at 9:37 PM, navimarin <navimarin_at_[hidden]> wrote:
> I have been searching open-mpi.org up and down but couldn't find any docs on
> what open-pal does.
> Am I too dumb? mpi-forum.org just provides a pdf which does not cover that
> part as well.
> Where can I found some info about that thing?
> docs mailing list