Hi,
i want to build a cluster with openmpi.
2 nodes:
node 1: 4 x Amd Quad Core, ubuntu 9.04, openmpi 1.3.2
node 2: Sony PS3, ubuntu 9.04, openmpi 1.3
both can connect with ssh to each other and to itself without passwd.
I can run the sample proramm pi.c on both nodes seperatly (see below).
Dear readers,
With OpenMPI, how would one go about requesting to load environment modules (of
the http://modules.sourceforge.net/ kind) on remote nodes, augmenting those
normally loaded there by shell dotfiles?
Background:
I run a RHEL-5/CentOS-5 cluster. I load a bunch of default modules t
Hi Michael,
I'm not sure why you dont see Open MPI behaving like other MPI's w.r.t.
modules/environment on remote MPI tasks - we do.
xe:~ > qsub -q express -lnodes=2:ppn=8,walltime=10:00,vmem=2gb -I
qsub: waiting for job 376366.xepbs to start
qsub: job 376366.xepbs ready
[dbs900@x27 ~]$ module
Hi David,
Hmm, your demo is well-chosen and crystal-clear, yet the output is unexpected.
I do not see environment vars passed by default here:
login3$ qsub -l nodes=2:ppn=1 -I
qsub: waiting for job 34683.mds01 to start
qsub: job 34683.mds01 ready
n102$ mpirun -n 2 -machinefile $PBS_NODEFILE h
I can see the difference - we built Open MPI with tm support. For some
reason, I thought mpirun fed its environment to orted (after orted is
launched) so orted can pass it on to MPI tasks. That should be portable
between different launch mechanisms. But it looks like tm launches
orted with the
Your cmd line is telling OMPI to run 17 processes. Since your hostfile
indicates that only 16 of them are to run on 10.4.23.107 (which I assume is
your PS3 node?), 1 process is going to be run on 10.4.1.23 (I assume this is
node1?).
I would guess that the executable is compiled to run on the PS
Not exactly. It completely depends on how Torque was setup - OMPI isn't
forwarding the environment. Torque is.
We made a design decision at the very beginning of the OMPI project not to
forward non-OMPI envars unless directed to do so by the user. I'm afraid I
disagree with Michael's claim that
>>> Ralph Castain 11/17/09 4:04 PM >>>
>Your cmd line is telling OMPI to run 17 processes. Since your hostfile
indicates that only 16 of them are to >run on 10.4.23.107 (which I
assume is your PS3 node?), 1 process is going to be run on 10.4.1.23 (I
assume >this is node1?).
node1 has 16 Cores (4 x
I noticed that you also have different versions of OMPI. You have 1.3.2 on
node1 and 1.3 on node2.
can you try to put same versions of OMPI on both nodes.
can you also try running np 16 on node1 when you try running separately.
Lenny.
On Tue, Nov 17, 2009 at 5:45 PM, Laurin Müller wrote:
>
>
> >>
Hi,
On Nov 17, 2009, at 9:10 , Ralph Castain wrote:
> Not exactly. It completely depends on how Torque was setup - OMPI isn't
> forwarding the environment. Torque is.
I actually tried compiling OMPI with the tm interface a couple of versions back
for both packages but ran into memory trouble, w
On Nov 17, 2009, at 10:17 , Michael Sternberg wrote:
On Nov 17, 2009, at 9:10 , Ralph Castain wrote:
Not exactly. It completely depends on how Torque was setup - OMPI
isn't forwarding the environment. Torque is.
I actually tried compiling OMPI with the tm interface a couple of
versions back
Hi Ralph,
Now I'm in a quandry - if I show you that its actually Open MPI that is
propagating the environment then you are likely to "fix it" and then tm
users will lose a nice feature. :-)
Can I suggest that "least surprise" would require that MPI tasks get
exactly the same environment/limits
Ah - not good. It is clearly a programming error. I'll have to review the other
launchers and consult the others in the project to decide on the proper course
of action.
Thanks
On Nov 17, 2009, at 1:49 PM, David Singleton wrote:
>
> Hi Ralph,
>
> Now I'm in a quandry - if I show you that its
Dear users
I installed openmpi 1.3.3 on my PC (single core & quad-processes). The
compilation reported no error and I have found the executable file in the
configure directory. But when I try to test it, I met a problem.
I tested it with Vasp and PWscf programs, respectively. I typed "mpirun -np
On Nov 17, 2009, at 7:39 PM, Jiaye Li wrote:
> Dear users
>
> I installed openmpi 1.3.3 on my PC (single core & quad-processes). The
> compilation reported no error and I have found the executable file in the
> configure directory. But when I try to test it, I met a problem.
>
> I tested it
Sorry I didn't answer more completely before - a tad tied up today with network
problems :-/
Actually, both you and Michael pointed out the "flaw" in your own reasoning,
and hit the reason why we -don't- forward environment. It is obvious, for
example, that you don't want to forward HOSTNAME an
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