On Sun, 2009-06-07 at 13:51 -0700, Woodruff, Robert J wrote: > Doug wrote, > > >One minor clarification, it's not so much the RPM packaging that makes > >things difficult, it's the compatibility matrix. Since things aren't > >designed to cleanly inter-operate with each other in anything other than > >very specific combinations, it means that updates are an all or nothing > >affair. This is in direct contrast to the rest of our entire operating > >system where we isolate and target things that need fixed and only > >things that need fixed. > > I think this was true early on with the OFA and OFED releases, but > I do think things are stabilizing in this area as the code has > matured and thus I think that having various components decoupled > should be easier going forward.
For most things this is true, but not for all.
> BTW, Intel MPI has always
> been decoupled and we have not seen this to be a problem. We have
> recommended people install newer versions of OFED from time to time
> as MPI found bugs that were fixed in the newer OFED, but it was
> not the API that was not stable, it was just bugs that were found
> that required a newer OFED version.
I don't know the particulars of how Intel MPI is distributed, built,
etc. But, when you tell me that you have from time to time recommended
customers install a later version of OFED to get a bug fix, I get the
impression that you start off by telling customers that OFED is a
prerequisite to running Intel MPI in the first place. If that's the
case, then I would question whether that's decoupled from OFED, or just
not in the OFED tarball.
--
Doug Ledford <dledf...@redhat.com>
GPG KeyID: CFBFF194
http://people.redhat.com/dledford
Infiniband specific RPMs available at
http://people.redhat.com/dledford/Infiniband
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