On 3 April 2009 at 03:33, Jerome BENOIT wrote: | The above submission works the same on my clusters. | But in fact, my issue involve interconnection between the nodes of the clusters: | in the above examples involve no connection between nodes. | | My cluster is a cluster of quadcore computers: | if in the sbatch script | | #SBATCH --nodes=7 | #SBATCH --ntasks=15 | | is replaced by | | #SBATCH --nodes=1 | #SBATCH --ntasks=4 | | everything is fine as no interconnection is involved. | | Can you test the inconnection part of the story ?
Again, think about in terms of layers. You have a problem with slurm on top of Open MPI. So before blaming Open MPI, I would try something like this: ~$ orterun -np 2 -H abc,xyz /tmp/jerome_hw Hello world! I am 1 of 2 and my name is `abc' Hello world! I am 0 of 2 and my name is `xyz' ~$ ie whether the simple MPI example can be launched successfully on two nodes or not. Dirk -- Three out of two people have difficulties with fractions.
