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| The [http://www.ansys.com/ Ansys] engineering simulation tools are installed in the CC software stack.
| | Ansys is documented on the Alliance wiki: |
| | https://docs.alliancecan.ca/wiki/Ansys |
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| =Getting a licence=
| | CMC Microsystems no longer provides Ansys licences. Use the Alliance-wide |
| | | SHARCNET licence, which is free for academic use on Trillium, or your |
| CMC Microsystems no longer provides Ansys licences. Trillium users should use the Alliance-wide SHARCNET licence, which is free for academic use on any Alliance cluster, or an Ansys licence server at their own institution. | | institution's licence server. For the custom licence-server tunnel, see |
| | | [[SSH Tunnelling]]. |
| To use the SHARCNET licence, create the file <code>~/.licenses/ansys.lic</code> containing:
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| setenv("ANSYSLMD_LICENSE_FILE", "1055@license1.computecanada.ca")
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| The SHARCNET licence is shared first come, first served and has a per-researcher core limit. The [https://docs.alliancecan.ca/wiki/Ansys Alliance Ansys page] gives the current limit, the products covered, and the instructions for using a local institutional licence server.
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| =Running on Trillium=
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| Load the following modules (current as of Apr 2026, newer versions may be available):
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| module load StdEnv/2023
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| module load ansys/2025R2.04
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| Programs available:
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| * fluent
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| * ansysedt
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| * mapdl
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| * ...
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| You can use the Ansys graphical tools to set up your problem, but you cannot use the graphical tools to submit your job. The job must be submitted to the scheduler for running.
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| More information can be found here: https://docs.alliancecan.ca/wiki/ANSYS
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| ==Setting up your .mw directory==
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| Ansys will attempt to write to your $HOME/.mw directory. This will work when you are testing your workflow on the login nodes, because they can write to $HOME. However, recall that the compute nodes cannot write to the /home filesystem. If you attempt to run Ansys from a compute node using the default configuration, it will fail because Ansys cannot write to $HOME/.mw.
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| The solution is to create an alternative directory called $SCRATCH/.mw, and create a soft link from $HOME/.mw to $SCRATCH/.mw:
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| mkdir $SCRATCH/.mw
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| ln -s $SCRATCH/.mw $HOME/.mw
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| This makes Ansys think it is writing to $HOME/.mw, when in fact it is writing to $SCRATCH/.mw. This command only needs to be run once.
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| ==Running ansys==
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| Example submission script for a job running on 1 node, with max walltime of 11 hours:
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| <source lang="bash">
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| #!/bin/bash
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| #SBATCH --nodes=1
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| #SBATCH --ntasks-per-node=192
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| #SBATCH --time=11:00:00
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| #SBATCH --job-name test
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| module load StdEnv/2023
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| module load ansys/2025R2.04
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| # DIRECTORY TO RUN - $SLURM_SUBMIT_DIR is directory job was submitted from
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| cd $SLURM_SUBMIT_DIR
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| machines=$(srun bash -c 'hostname -s' | sort | uniq | awk '{print $1 ":" 40}' | paste -s -d ':')
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| ansys252 -b -j JOBNAME -dis -machines "$machines" -i ansys.in
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| </source>
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| ==Custom licence server==
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| To use your own licence server for Ansys, you need to open SSH tunnels to the required ports and point Ansys at the tunnels.
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| For example: | |
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| <source lang="bash">
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| ssh tri-gw -fNL 1055:license.server:1055
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| ssh tri-gw -fNL 1056:license.server:1056
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| ssh tri-gw -fNL 2325:license.server:2325
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| export ANSYSLI_SERVERS=2325@localhost
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| export ANSYSLMD_LICENSE_FILE=1055@localhost
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| export LM_LICENSE_FILE=1055@localhost
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| </source>
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| The tunnels leave through the SciNet gateway <code>tri-gw</code>, which serves
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| both Trillium and Balam and has outgoing address 142.150.188.58. Ask your
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| licence provider to allow connections from that address and confirm which
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| ports the tunnel should use.
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Ansys is documented on the Alliance wiki:
https://docs.alliancecan.ca/wiki/Ansys
CMC Microsystems no longer provides Ansys licences. Use the Alliance-wide
SHARCNET licence, which is free for academic use on Trillium, or your
institution's licence server. For the custom licence-server tunnel, see
SSH Tunnelling.