Please submit the job as below (this will make sure one node runs one user job at a time )
For multi-node job use:
qsub -l select=1:ncpus=1:mem=10mb -l walltime=10:00:00 -l place=scatter:excl – /bin/sleep 100
For single node job:
qsub -l select=1:ncpus=1:mem=10mb -l walltime=10:00:00 -l place=excl – /bin/sleep 100
Thank you