2.5 KiB
2.5 KiB
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| title | last_updated | keywords | summary | sidebar | permalink |
|---|---|---|---|---|---|
| ANSYS / CFX | 30 June 2020 | software, ansys, cfx5, cfx, slurm | This document describes how to run ANSYS/CFX in the Merlin6 cluster | merlin6_sidebar | /merlin6/ansys-cfx.html |
This document describes the different ways for running ANSYS/CFX
ANSYS/CFX
Is always recommended to check which parameters are available in CFX and adapt the below examples according to your needs.
For that, run cfx5solve -help for getting a list of options.
Running CFX jobs
PModules
Is strongly recommended the use of the latest ANSYS software ANSYS/2020R1-1 available in PModules.
module use unstable
module load ANSYS/2020R1-1
Non-interactive: sbatch
Running jobs with sbatch is always the recommended method. This makes the use of the resources more efficient.
Serial example
#!/bin/bash
#SBATCH --job-name=CFX # Job Name
#SBATCH --partition=hourly # Using 'daily' will grant higher priority than 'general'
#SBATCH --time=0-01:00:00 # Time needed for running the job. Must match with 'partition' limits.
#SBATCH --cpus-per-task=1 # Double if hyperthreading enabled
#SBATCH --hint=nomultithread # Disable Hyperthreading
#SBATCH --error=slurm-%j.err # Define your error file
module use unstable
module load ANSYS/2020R1-1
SOLVER_FILE=/data/user/caubet_m/CFX5/mysolver.in
cfx5solve -batch -def "$JOURNAL_FILE"
MPI-based example
An example for running CFX using a Slurm batch script is the following:
#!/bin/bash
#SBATCH --job-name=CFX # Job Name
#SBATCH --partition=hourly # Using 'daily' will grant higher priority than 'general'
#SBATCH --time=0-01:00:00 # Time needed for running the job. Must match with 'partition' limits.
#SBATCH --nodes=1 # Number of nodes
#SBATCH --ntasks=44 # Number of tasks
#SBATCH --cpus-per-task=1 # Double if hyperthreading enabled
#SBATCH --ntasks-per-core=1 # Run one task per core
#SBATCH --hint=nomultithread # Disable Hyperthreading
#SBATCH --error=slurm-%j.err # Define a file for standard error messages
##SBATCH --exclusive # Uncomment if you want exclusive usage of the nodes
module use unstable
module load ANSYS/2020R1-1
JOURNAL_FILE=/data/user/caubet_m/CFX/myjournal.in
cfx5solve -batch -def "$JOURNAL_FILE" -part $SLURM_NTASKS
In the above example, one can increase the number of nodes and/or ntasks if needed. One can remove `--nodes`` for running on multiple nodes, but may lead to communication overhead.