What this example does is that it finds a whole lot of scripts in a directory and gets gnu parallel to run them. The -j 6 options tells gnu parallel to assume that each sub-job requires 6 cores.

gnu_parallel.qsub

#!/bin/bash
#PBS -e /mnt/lustre/users/USERNAME/test_scripts/gnu_parallel.stderr.out
#PBS -o /mnt/lsutre/users/USERNAME/test_scripts/gnu_parallel.stdout.out
#PBS -V
#PBS -P PROGRAMMESHORTNAME
#PBS -M youremailaddress
#PBS -l select=2:ncpus=24:nodetype=haswell_reg
#PBS -l walltime=00:01:00
#PBS -q normal
#PBS -m be
#PBS -r n
#PBS -mb
 
module add chpc/gnu/parallel-20160422
 
WORKING_DIR=/mnt/lustre/users/USERNAME/test_scripts
echo "Hello World! Main gnu parallel test thingy running here"
 
cd ${WORKING_DIR}
 
ls ${WORKING_DIR}/gnup_scripts/* | parallel -j 6 -u --sshloginfile ${PBS_NODEFILE} "cd ${WORKING_DIR}/gnup_scripts; {} {}"

Then inside the directory

/mnt/lustre/users/USERNAME/test_scripts/gnup_scripts

you can put a whole lot of copies of the following file:

gnup.test.sh

#!/bin/bash
 
NOW=$(date +"%x %X")
echo "Hello World! The time is ${NOW} and I'm running on host: ${HOSTNAME}. I'm running task $1 :-)"
sleep 1

and make sure they are all runnable, i.e.

chmod u+x gnup.test.sh

After running

qsub gnu_parallel.qsub

if you look inside

/mnt/lsutre/users/USERNAME/test_scripts/gnu_parallel.stdout.out

you should see something like:

Hello World! Main gnu parallel test thingy running here
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.12.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.10.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.13.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.14.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.15.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.16.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.17.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.18.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.19.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.1.sh :-)
Hello World! The time is 05/05/2016 15:24:26 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.20.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.11.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.21.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.23.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.22.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.24.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.25.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.26.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.27.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.28.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.29.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.2.sh :-)
Hello World! The time is 05/05/2016 15:24:27 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.30.sh :-)
Hello World! The time is 05/05/2016 15:24:28 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.31.sh :-)
Hello World! The time is 05/05/2016 15:24:28 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.32.sh :-)
Hello World! The time is 05/05/2016 15:24:28 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.33.sh :-)
Hello World! The time is 05/05/2016 15:24:28 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.34.sh :-)
Hello World! The time is 05/05/2016 15:24:28 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.35.sh :-)
Hello World! The time is 05/05/2016 15:24:28 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.36.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.3.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.4.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.5.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.6.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0282. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.7.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.8.sh :-)
Hello World! The time is 05/05/2016 15:24:29 and I'm running on host: cnode0281. I'm running task /home/dane/test_scripts/gnup_scripts/gnup.test.9.sh :-)