It's hard for me to believe that would work as there are fundamental differences in the MPI-to-RTE interactions between those releases. If it does, it could be a fluke - I personally would not trust it.
Ralph On Mon, Apr 27, 2009 at 12:04 PM, Serge <sk...@ap.smu.ca> wrote: > Hi Jeff, > > > That being said, we have fixed this issue and expect to support binary > > compatibility between Open MPI releases starting with v1.3.2 (v1.3.1 > > As far as I can tell from reading the release notes for v1.3.2, the binary > compatibility has not been announced yet. It was rather a bug fix release. > Is it correct? Does it mean that the compatibility feature is pushed to > later releases, v1.3.3, 1.3.4? > > In my original message (see below) I was looking for advice as for a > seamless transition from v1.2.x to v1.3.x in a shared multi-user > environment. > > Interestingly enough, recently I noticed that although it's impossible to > run an application compiled with v1.2.x under v1.3.x, the opposite does > actually work. An application compiled with v1.3.x runs using Open MPI > v1.2.x. Specifically, I tested an application compiled with v1.3.0 and > v1.3.2, running under Open MPI v1.2.7. > > This gives me a perfect opportunity to recompile all the parallel > applications with v1.3.x, transparently to users; and then switch the > default Open MPI library from v1.2.7 to v1.3.x, when all the apps have been > rebuilt. > > The problem is that I am not 100% sure in this approach, even having some > successful tests done. > > Is it safe to run an application built with 1.3.x under 1.2.x? Does it make > sense to you? > > = Serge > > > Jeff Squyres wrote: > >> Unfortunately, binary compatibility between Open MPI release versions has >> never been guaranteed (even between subreleases). >> >> That being said, we have fixed this issue and expect to support binary >> compatibility between Open MPI releases starting with v1.3.2 (v1.3.1 should >> be released soon; we're aiming for v1.3.2 towards the beginning of next >> month). >> >> >> >> On Mar 10, 2009, at 11:59 AM, Serge wrote: >> >> Hello, >>> >>> We have a number of applications built with Open MPI 1.2 in a shared >>> multi-user environment. The Open MPI library upgrade has been always >>> transparent and painless within the v1.2 branch. Now we would like to >>> switch to Open MPI 1.3 as seamlessly. However, an application built with >>> ompi v1.2 will not run with the 1.3 library; the typical error messages >>> are given below. Apparently, the type ompi_communicator_t has changed. >>> >>> Symbol `ompi_mpi_comm_null' has different size in shared object, >>> consider re-linking >>> Symbol `ompi_mpi_comm_world' has different size in shared object, >>> consider re-linking >>> >>> Do I have to rebuild all the applications with Open MPI 1.3? >>> >>> Is there a better way to do a smooth upgrade? >>> >>> Thank you. >>> >>> = Serge >>> >> _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
