Hi Ali I have seen this reported twice now I think from two different sources, but I could be incorrect. Unfortunately, we don¹t have access to an AIX cluster to investigate the problem. We don¹t see it on any other platform at this time.
Could you tell me something more about your cluster? In particular, it would help to know your launch environment (e.g., rsh/ssh, SLURM, TM, etc.). The noted behavior of using debug-daemons to resolve the problem has me puzzled as that flag only causes the daemons to keep their stdio ports open it has nothing to do with the application processes nor the I/O forwarding subsystem. I can suggest a couple of options in the interim, though I don¹t know that they will solve the problem: 1. You could upgrade to the 1.2 beta release. The runtime underwent some significant changes that might help here; or 2. You could try configuring Open MPI with ³--disable-pty-support². The I/O forwarding system is currently based upon pty¹s. We have seen a problem on one other platform where the pty support wasn¹t quite what Open MPI expects disabling it solved the problem. You should first check if the 1.1.2 release supports this configuration option (I honestly can¹t remember it has been too long) - you may need to upgrade to 1.2 to do this. I hope that provides some help. If/when we get access to an AIX cluster, we¹ll try to dig deeper into this issue. Ralph On 12/22/06 7:44 AM, "Ali Eghlima" <ali_eghl...@raytheon.com> wrote: > > Hello, > > We have Open MPI 1.1.2 installed on IBM AIX 5.3 cluster. It looks like > terminal output is broken. There are a few entry in the archive for this > problem, > with no suggested solution or real work around. > > I am putting this posting with hope to get some advise for a work around or > solution. > > > > #mpirun -np 1 hostname > > No out put, piping the command to "cat" or "more" generate no out put > as well. > The only way to get an output from this command is to add > --debug-daemons > > #mpirun -np 1 --debug-daemons hostname > > Even this debug option is not working for a real application which generate > several output. > > Looking forward for any comments. > > Thanks > > Ali, > > > > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
