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Subject: Re: [OMPI users] Non-root install; hang there running on multiple nodes
From: Trent Creekmore (mtcreekmore_at_[hidden])
Date: 2010-03-24 17:13:42

You may also want to check with the admin. I know on the system I use, he
will prevent you from using many nodes until you demonstrate you know what
you are doing.

-----Original Message-----
From: users-bounces_at_[hidden] [mailto:users-bounces_at_[hidden]] On
Behalf Of Jeff Squyres
Sent: Wednesday, March 24, 2010 3:33 PM
To: Open MPI Users
Subject: Re: [OMPI users] Non-root install; hang there running on multiple

Can you mpirun non-MPI applications, like "hostname"? I frequently run this
as a first step to debugging a wonky install. For example:

shell$ hostname
shell$ mpirun hostname
shell$ cat hosts
shell$ mpirun --hostfile hosts hostname

On Mar 24, 2010, at 4:28 PM, haoanyi wrote:

> Hi,
> I installed OpenMPI1.4.1 as a non-root user on a cluster. It is totally OK
when I run with mpirun or mpiexec on one single node for many processes.
However, when I lauch many processes on multiple nodes, I can observe jobs
are distributed to those nodes (by using "top"), but all the jobs just hang
there and cannot finish.
> I think the nodes use TCP to communicate with each other. This cluster
also provides MPICH2, which was configured by the sys admin., and has no
problem to do node communication in MPICH2. Besides, I read from some posts,
which says this may be caused by TCP firewall. Since I have no root's right,
and I don't know what shall request the admin. to do to fix this problem.
So, can you tell me how to do that either by the admin root or by the
non-root user (if possible)?
> Thank you very much.
> Hao
> _______________________________________________
> users mailing list
> users_at_[hidden]

Jeff Squyres
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