...

Usage and Licensing at HLRN

The use of Ansys is restricted to members of the ansys user group. You can apply to become a group member at support[at]hlrn.de
Please note the license conditions: Our academic licenses are restricted to students, PhD students, teachers and trainers of public institutions. They cannot be used in projects that are financed by industrial partners.

This allows for the batch system to start the job The flag "#SBATCH -L ansys" ensures that the scheduler starts jobs only, when the appropriate number of licenses is are available.
You can check the availability yourself: scontrol show lic

• aa

...

• _

...

• r is a "ANSYS Academic Research License" with 16 inclusive tasks. Research jobs with more than 16 tasks cost additional "aa_r_hpc" licenses.

...

• aa_t_a is a "ANSYS Academic Teaching License" with a maximum of 16 tasks. These may be used only for student projects, student instruction and student demonstrations. Eligible users are allowed to activate these, by adding the flag
  

  Codeblock
  title Activation of the aa_t_a license
  -lpf $ANSYSLIC_DIR/prodord/license.preferences_for_students_and_teaching.xml

  to the Ansys executable, such as "cfx5solve". The path $ANSYSLIC_DIR is provided after loading any Ansys module. Alternatively, eligible users are allowed to redefine their command "cfx5solve" with

  Codeblock
  title Redefining cfx5solve for students
  source $ANSYSLIC_DIR/cfx5solve_redef_with_student_lic

  after loading the Ansys module inside the job script. This will prepend the flag "-lpf ..." to "cfx5solve" automatically if less than 17 task are requested.

Example Jobscripts

#!/bin/bash
#SBATCH -t 00:10:00
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=40
#SBATCH -L ansys
#SBATCH -p medium40:test
#SBATCH --mail-type=ALL
#SBATCH --job-name=StaticMixer

module load ansys/2019r2

## create list of hosts in calculation
srun hostname -s > hostlist.$SLURM_JOB_ID

## format the host list for cfx
cfxhostlist=`tr '\n' ',' < hostlist.$SLURM_JOB_ID`

echo $cfxhostlist

# start the solver
cfx5solve -def StaticMixer.def -start-method "Intel MPI Distributed Parallel"\
-double -par-dist "$cfxhostlist"

echo '#################### CFX finished ############'
sleep 2
rm hostlist.$SLURM_JOB_ID

...