COMSOL

More information about Comsol GUI applications and Comsol batch jobs here: TUCOLAB- Comsol

The following case is provided here including the appropriate batch-file: karman.zip

Solely for the purpose of demonstrating how to use Comsol on a cluster.

Available version of Comsol can be found by executing the following line:

module avail Comsol

Currently on VSC-4 and VSC-5, these versions can be loaded:

• Comsol/5.5
• Comsol/5.6
• Comsol/6.1

module load *your preferred module*

Typically, you would define your entire case either on the interactive access (using noMachine) or on your local machine, and then save it as a *.mph file. We recommend using noMachine because both the interactive access and the cluster itself have the same software packages installed. The *.mph file encapsulates all the necessary information required to successfully run a calculation on the cluster.

An example of a job script is provided below. The 'devel' partition was utilized for testing purposes; subsequently, if the job performs as desired, please select a different qos.

#!/bin/bash
# slurmsubmit.sh
##Example for VSC5 zen0512
#SBATCH --nodes=1
#SBATCH --ntasks-per-node=4
#SBATCH --job-name="karman"
#SBATCH --partition=zen3_0512
#SBATCH --qos=zen3_0512_devel

export I_MPI_PIN_RESPECT_CPUSET=0
export I_MPI_PIN_PROCESSOR_LIST=0-3

module purge
module load intel-mpi/2021.5.0 
module load Comsol/6.1


INPUTFILE="karman.mph"
OUTPUTFILE="karmanout.mph"
BATCHLOG="LOGFILE.log"


comsol -mpi intel -np 4 -nn 4 batch slurm -inputfile ${INPUTFILE} -outputfile ${OUTPUTFILE} -batchlog ${BATCHLOG} -alivetime 600

COMSOL is generating a huge amount of temporary files during the calculation. These files in general got saved in $HOME and then this error will be occuring. To avoid it, you have to change the path of $TMPDIR to e.g. /local. So the temporary files will be stored on the SSD-storage local to the compute node. To get rid of this error just augment the comsol command in the job script by the following option:

-tmpdir "/local"

sbatch karman.job