Example script for OpenMPI
Please do not use any parameters such as "-np" when calling "mpirun". OpenMPI was built against the task management libraries of PBS and gets all parameters automatically from the runtime environment of the job.
#!/bin/bash#PBS -N MPI-Test#PBS -l select=2:ncpus=20:mem=20GB:mpiprocs=20#PBS -l walltime=12:00:00#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)#PBS -o MPI-Test_pbs.out#PBS -e MPI-Test_pbs.errmodule add openmpi softwarempirun software.bin
Example script for a GPU job
To book a node with a GPU, add the specification ":ngpus=1" to the "select" statement:
#!/bin/bash#PBS -N GPU test#PBS -l select=1:ncpus=20:mem=20GB:mpiprocs=20:ngpus=1#PBS -l walltime=12:00:00#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)#PBS -o GPU-Test_pbs.out#PBS -e GPU-Test_pbs.errmodule add tensorflowpython3 my_tf_job.py
Please keep in mind that there are only 3 nodes with one GPU each in the cluster. If you want to calculate on 2 GPUs, increase the counter for "select", but leave "ngpus" at 1.
Example script for GPU job with desktop environment (remote access)
The GPU nodes offer the option of starting a desktop environment that can be accessed using the remote protocol "VNC" (secured via SSL encryption). This can be useful to visualise calculation results or to run an application interactively with a graphical user interface. To do this, start a normal GPU job and run the "start-desktop" script provided as an application. You will receive all further instructions for access by email.
#!/bin/bash#PBS -N GPU visualisation#PBS -l select=1:ncpus=20:mem=60GB:mpiprocs=20:ngpus=1#PBS -l walltime=04:00:00#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)start-desktop
After dialling in on the GPU node, open a terminal, load the module of your application and start it by calling the programme in the terminal. Due to the modularisations, the application will not be found in the start menu of the desktop environment.
Further example scripts
Gaussian works in principle on one node. The 'Linda' software package responsible for MPI was not procured after analyses of the scaling (benchmarking). As a result, a maximum of 12 cores (2 CPU á 6 cores) can be claimed for Gaussian jobs.
#!/bin/bash#PBS -N gaussian #PBS -l select=1:ncpus=12:mem=2gb#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de) #PBS -o gaussian_pbs.out #PBS -e gaussian_pbs.err module add gaussian PBS_O_WORKDIR=$SCRATCH/gaussian-files cd $PBS_O_WORKDIR g16 < ./fe48a.com
Note: If no Gaussian version is specified, as in the script above, the highest version in the module system is loaded (gaussian/16b01-sse4). Executable is called g16. Another form is the direct version specification, e.g. 'module add gaussian/09e01'; executable is g09
#!/bin/bash## options for requesting resources ## select - number of chunks (should be number of cores you want to use)## ncpus - cores per chunk (should be 1)## mem - requested memory per chunk## place - how to distribute jobs across the machine (should be free or scatter)#PBS -l select=32:ncpus=1:mem=250mb,place=free## walltime - requested run-time of the job#PBS -l walltime=24:00:00## queue the job should be submitted to## 'default' queue direct the job automatically#PBS -q default## supress requeueing#PBS -r n## location of the output of the job files##PBS -W sandbox=PRIVATE## Name of the Job, name is used for the output files and the 'job name' in qstat#PBS -N caseName ## Job files are placed in ~/pbs.JOBID directory while job is running and copied afterwards to working directory##PBS -e $PBS_JOBNAME_err.log ##PBS -o $PBS_JOBNAME_out.log
## Select the OpenFOAM Version you want to use, see "module av openfoam" for more## OpenFOAM v1712module add openfoam/gcc/7.1.0/v1712## OpenFOAM 5.x# module add openfoam/gcc/7.1.0/5.x## execute mpi jobmpirun simpleFoam -case /scratch/username/path/to/case -parallel
#!/bin/bash#PBS -N Ansys#PBS -l select=1:ncpus=12:mem=2GB:mpiprocs=12#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)module load ansys/18.2module load intel/impicd $PBS_O_WORKDIRCORES=`cat $PBS_NODEFILE | wc -l`
export ANSYSLMD_LICENSE_FILE={port}@{licence server} # optional
fluent 3ddp -mpi=intel -cnf=$PBS_NODEFILE -g -t$CORES -i inputfile > outfile
Please do not use parameters such as "-np" when calling "mpirun". OpenMPI was built against the task management libraries of PBS and gets all parameters automatically from the runtime environment of the job.
#!/bin/bash#PBS -N MPI#PBS -l select=10:ncpus=1:mem=2gb:mpiprocs=1#PBS -l walltime=24:00:00#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)#PBS -o MPI-Test_pbs.out#PBS -e MPI-Test_pbs.errmodule add openmpi/gcc/9.1.0/4.1.5cd $PBS_O_WORKDIRmpirun ./Program.exe
#!/bin/bash#PBS -l select=2:ncpus=4:mpiprocs=4:mem=6gb,walltime=2:00:00#PBS -r n#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadress [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)
# Sample input files can be found here:# http://winserv.imfd.tu-freiberg.de:2080/v6.12/books/exa/default.htmJOBNAME="example" # = Name base of the input fileWORKDIR="$SCRATCH/$PBS_JOBID"LINKNAME="panfs_$PBS_JOBID"echo "ABAQUS JOB: $JOBNAME"echo "Loading modules"module add abaqus/2019NCPUSTOT=`qstat -f $PBS_JOBID | sed -n -e 's/ //g' -e 's/Resource_List.ncpus=//p'`mkdir -v "$WORKDIR"cd "$PBS_O_WORKDIR"ln -v -s "$WORKDIR" "$LINKNAME"cd "$WORKDIR"cp -v -t ./ "$PBS_O_WORKDIR"/"$JOBNAME".inpEXEC="abaqus interactive job=$JOBNAME cpus=$NCPUSTOT"echo "running: $EXEC"$EXECmv -v -f -t "$PBS_O_WORKDIR" "$JOBNAME".*rm -v -f *cd "$PBS_O_WORKDIR"rmdir -v "$WORKDIR"rm -v -f "$LINKNAME"echo "finished"
#!/bin/bash#PBS -N Name#PBS -l select=1:ncpus=4:mem=15gb:mpiprocs=4#PBS -l walltime=48:00:00#PBS -l place=pack#PBS -q short#PBS -m abe## Customise and remove second hash:##PBS -M Your [dot] Mailadresse [at] tu-freiberg [dot] de (Ihre[dot]Mailadresse[at]tu-freiberg[dot]de)#PBS -o orca.out#PBS -e orca.err
module load openmpi/gcc/7.1.0/2.1.1module load orca/4.0.1
cd $PBS_O_WORKDIR/trinity/shared/applications/orca/4.0.1/bin/orca inputfile >>outputfile.out
Frequently used environment variables
When writing scripts, it can be helpful to work with variables instead of static entries (e.g. order paths) to make it easier to port the script. Below you will find a list of variables that are available in the runtime environment of a job. Avoid overwriting the following variables manually so as not to disrupt the system-side execution of the jobs
| Variable | Content | |
|---|---|---|
| $PBS_O_WORKDIR | absolute path to the directory, from which the qsub command was sent | |
| $PBS_NODEFILE | absolute path to the file containing the nodes involved in the job; "/var/spool/pbs/aux/$PBS_JOBID" | |
| $PBS_JOBNAME | Name of the job defined in the script header with "#PBS -N " | |
| $PBS_JOBID | ID of the job in the form of ".mmaster" | |
| $USER | own user name | |
| $HOME | absolute path to /home/$USER | |
| $SCRATCH | absolute path to /scratch/$USER | . path to /scratch/$USER |
| $TMPDIR | absolute path to a temporary directory in the working memory of the node. Can be used as a particularly fast node-local scratch. The size limit is the requested working memory of the job; the job is cancelled when 100% full. Created files are deleted without being asked at the end of the job and must therefore, if desired, be copied away manually at the end of the job, e.g. to $SCRATCH.e.g. to $SCRATCH/$PBS_JOBNAME | |
| $NCPUS | The NCPUS number specified in the select statement (#PBS -l select=X:ncpus=Y:...) | |
| $OMP_NUM_THREADS | is normally equal to the number of $NCPUS . This variable is used by applications that work with multiple threads (OpenMP). Applications parallelised with MPI do not normally use this variable. (This variable can be overwritten by manually specifying it in the select statement (#PBS -l select=X:ncpus=Y:ompthreads=Z:...).) | |
| $PBS_NODENUM | For multi-node jobs, the local number of the node involved |