Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Prentice Bisbal wrote: Ashley Pittman wrote: This smacks of a firewall issue, I thought you'd said you weren't using one but now I read back your emails I can't see anywhere where you say that. Are you running a flrewall or any iptables rules on any of the nodes? It looks to me like you

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Ashley Pittman wrote: > This smacks of a firewall issue, I thought you'd said you weren't using one > but now I read back your emails I can't see anywhere where you say that. Are > you running a flrewall or any iptables rules on any of the nodes? It looks > to me like you may have some setup

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

This smacks of a firewall issue, I thought you'd said you weren't using one but now I read back your emails I can't see anywhere where you say that. Are you running a flrewall or any iptables rules on any of the nodes? It looks to me like you may have some setup from on the worker nodes.

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Rolf vandeVaart wrote: Ethan: Can you run just "hostname" successfully? In other words, a non-MPI program. If that does not work, then we know the problem is in the runtime. If it does works, then there is something with the way the MPI library is setting up its connections.

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Ethan: Can you run just "hostname" successfully? In other words, a non-MPI program. If that does not work, then we know the problem is in the runtime. If it does works, then there is something with the way the MPI library is setting up its connections. Is there more than one interface on

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Prentice Bisbal wrote: I'm assuming you already tested ssh connectivity and verified everything is working as it should. (You did test all that, right?) Yes. I am able to log in remotely to all nodes from the master, and to each node from each node without a password. Each node mounts the

[OMPI users] multipath support for infiniband

Hello, the InfiniBand architecture has a LMC feature to assign mutiple virtual LIDs to one port and so provides multiple paths between two ports. Is there a methode in openmpi to enable message-striping over these paths to increase bandwidth or avoid congestions? (I don't mean the multirail

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Prentice Bisbal wrote: Ethan Deneault wrote: All, I am running Scientific Linux 5.5, with OpenMPI 1.4 installed into the /usr/lib/openmpi/1.4-gcc/ directory. I know this is typically /opt/openmpi, but Red Hat does things differently. I have my PATH and LD_LIBRARY_PATH set correctly; because

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

Ethan Deneault wrote: > All, > > I am running Scientific Linux 5.5, with OpenMPI 1.4 installed into the > /usr/lib/openmpi/1.4-gcc/ directory. I know this is typically > /opt/openmpi, but Red Hat does things differently. I have my PATH and > LD_LIBRARY_PATH set correctly; because the test program

[OMPI users] PathScale problems persist

Hello, In January, I reported a problem with Open MPI 1.4.1 and PathScale 3.2 about a simple Hello World that hung on initialization ( http://www.open-mpi.org/community/lists/users/2010/01/11863.php ). Open MPI 1.4.2 does not show this problem. However, now we are having trouble with the 1.4.2,

Re: [OMPI users] Thread as MPI process

On 21 Sep 2010, at 09:54, Mikael Lavoie wrote: > Hi, > > Sorry, but i get lost in what i wanna do, i have build a small home cluster > with Pelican_HPC, that user openMPI, and i was trying to find a way to get a > multithreaded program work in a multiprocess way without taking the time to >

Re: [OMPI users] Thread as MPI process

Hi, Am 21.09.2010 um 10:54 schrieb Mikael Lavoie: > Sorry, but i get lost in what i wanna do, i have build a small home cluster > with Pelican_HPC, that user openMPI, and i was trying to find a way to get a > multithreaded program work in a multiprocess way without taking the time to > learn

Re: [OMPI users] Thread as MPI process

Am 21.09.2010 um 10:19 schrieb Ashley Pittman: > On 20 Sep 2010, at 22:24, Mikael Lavoie wrote: >> I wanna know if it exist a implementation that permit to run a single host >> process on the master of the cluster, that will then spawn 1 process per -np >> X defined thread at the host specified

Re: [OMPI users] Thread as MPI process

Hi, Sorry, but i get lost in what i wanna do, i have build a small home cluster with Pelican_HPC, that user openMPI, and i was trying to find a way to get a multithreaded program work in a multiprocess way without taking the time to learn MPI. And my vision was a sort of wrapper that take C posix

Re: [OMPI users] Thread as MPI process

On 20 Sep 2010, at 22:24, Mikael Lavoie wrote: > I wanna know if it exist a implementation that permit to run a single host > process on the master of the cluster, that will then spawn 1 process per -np > X defined thread at the host specified in the host list. The host will then > act as a

Re: [OMPI users] Thread as MPI process

Hi I don't know if i correctly understand what you need, but have you already tried MPI_Comm_spawn? Jody On Mon, Sep 20, 2010 at 11:24 PM, Mikael Lavoie wrote: > Hi, > > I wanna know if it exist a implementation that permit to run a single host > process on the master

Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.

David, I did try that after I sent the original mail, but the -np 4 flag doesn't fix the problem, the program still hangs. I've also double checked the iptables for the image and for the master node, and all ports are set to accept. Cheers, Ethan -- Dr. Ethan Deneault Assistant Professor