Hi Eddie Open MPI needs to create a temporary file system what we call our ³session directory² - where it stores things like the shared memory file. From this output, it appears that your /tmp directory is ³locked² to root access only.
You have three options for resolving this problem: (a) you could make /tmp accessible to general users; (b) you could use the tmpdir xxx command line option to point Open MPI at another directory that is accessible to the user (for example, you could use a ³tmp² directory under the user¹s home directory); or (c) you could set an MCA parameter OMPI_MCA_tmpdir_base to identify a directory we can use instead of /tmp. If you select options (b) or (c), the only requirement is that this location must be accessible on every node being used. Let me be clear on this: the tmp directory must not be NSF mounted and therefore shared across all nodes. However, each node must be able to access a location of the given name that location should be strictly local to each node. Hope that helps Ralph On 1/17/07 12:25 AM, "eddie168" <eddie168+ompi_u...@gmail.com> wrote: > Dear all, > > I have recently installed OpenMPI 1.1.2 on a OpenSSI cluster running Fedora > core 3. I tested a simple hello world mpi program (attached) and it runs ok as > root. However, if I run the same program under normal user, it gives the > following error: > > [eddie@oceanus:~/home2/mpi_tut]$ mpirun -np 2 tut01 > [oceanus:125089] mca_common_sm_mmap_init: ftruncate failed with errno=13 > [oceanus:125089] mca_mpool_sm_init: unable to create shared memory mapping ( > /tmp/openmpi-sessions-eddie@localhost_0/default-universe/1/shared_mem_pool.loc > alhost) > -------------------------------------------------------------------------- > It looks like MPI_INIT failed for some reason; your parallel process is > likely to abort. There are many reasons that a parallel process can > fail during MPI_INIT; some of which are due to configuration or environment > problems. This failure appears to be an internal failure; here's some > additional information (which may only be relevant to an Open MPI > developer): > PML add procs failed > --> Returned "Out of resource" (-2) instead of "Success" (0) > -------------------------------------------------------------------------- > *** An error occurred in MPI_Init > *** before MPI was initialized > *** MPI_ERRORS_ARE_FATAL (goodbye) > [eddie@oceanus:~/home2/mpi_tut]$ > > Am I need to give certain permission to the user in order to oversubscribe > processes? > > Thanks in advance, > > Eddie. > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
