[ofa-general] Re: Dapl 2 question/issue

[Doug Ledford]

On Tue, 2008-01-29 at 21:57 +0000, Tang, Changqing wrote:
> So can we install both v1 and v2 packages on a system ? At the install time, we don't know the app will run on v1 or v2.

Currently, you can install both runtimes, but not both devel
environments.

> --CQ
> 
> > -----Original Message-----
> > From: Arlin Davis [mailto:ardavis at ichips.intel.com]
> > Sent: Tuesday, January 29, 2008 3:46 PM
> > To: Doug Ledford
> > Cc: Tang, Changqing; general
> > Subject: Re: [ofa-general] Re: Dapl 2 question/issue
> >
> > Doug Ledford wrote:
> > >
> > > You *should* be claiming that regardless.  The API between
> > dapl-1 and
> > > dapl-2 changed, some of which is fixed simply be
> > recompiling and some
> > > of which requires actual code changes.  Just because the
> > library name
> > > is the same doesn't mean that code built and compiled
> > against dapl-1
> > > could or should attempt to run against dapl-2 (unless I'm
> > wrong here,
> > > Arlin should really speak to this issue...if the dapl-2 libraries
> > > provide backward compatible symbols via so symbol versions, then it
> > > might be possible for a dapl-1 program to run against the dapl-2
> > > library, but then that would beg the question of why we are still
> > > distributing dapl-1 libraries in a separate package, so I'm
> > guessing
> > > there is not a back compatible layer in the dapl-2 library).
> >
> > You are correct. dapl-1 programs cannot run against dapl-2.
> > That is why both v1 and v2 packages are provided. We have to
> > support existing v1 applications while providing a transition
> > path to v2.
> >
> > -arlin
> >
> >
-- 
Doug Ledford <dledford at 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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