> If you're just starting with MPI, we strongly recommend that you use Open
> MPI instead of LAM/MPI.
Infact, I did try using OpenMPI but there were a few problems that I came
across there too. I'm afraid I do not remember exactly what they were, but
I stuck to LAM since then, because most of the online guides for setting up
a Beowulf cluster instructed using LAM. I will try to use OpenMPI if I can,
but I would like to make this work, nevertheless.
> To directly answer your question, are you absolutely sure that your
> executable is named hello.o? .o files are typically intermediate object
> files.
Yes, the output file was hello.o, since I compiled the C code with the -o
flag as follows -
mpicc hello.c -o hello.o
Do you think that by any chance, all this is because the slave nodes and my
head nodes are of different architectures, ie. 32 bit and 64 bit? Although,
I made sure that the LAM version running on all of them is the same.
Regards,
Saahil
> On Oct 18, 2010, at 9:53 AM, saahil.in_at_[hidden] wrote:
> > Hello everyone,
> > I am doing an undergraduate level mini project that will demonstrate
> the working of and advantages of running a distributed algorithm in a
> truly distributed environment, in the form of a Beowulf cluster. For this
> purpose I am using LAM as my message passing interface. However, I am
> facing a problem while trying to test the set up with the hello world
> program. I was able to set up NFS properly, and am also able to boot
> using lamboot. I compiled the hello.c program with the mpicc option,
> copied the output file into the directory shared by nfs, and then used
> the following command to run -
> >
> > mpirun n0-2 hello.o
> >
> > I get an error saying that on atleast one of the nodes started by
> mpirun, MPI_INIT wasn't initialized.
> >
> > My head node(my personal laptop) is a x86_64 architecture based Fedora
> 12 system, and the rest of my slave nodes(lab computers) are x86 arch
> Fedora 13 systems. All systems are running the same version of Lam-Mpi
> 7.1.4.
> > Could anyone tell me as to where I might be going wrong?
> > Thank you very much.
> >
> > Regards,
> > Saahil_______________________________________________
> > This list is archived at http://www.lam-mpi.org/MailArchives/lam/
> --
> Jeff Squyres
> jsquyres_at_[hidden]
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