The ARC cluster environment has a number of compute nodes dedicated to running older "legacy" software applications. These are applications which are unable to run on the newer operating system installed on the main cluster. These nodes are kept within a "legacy" partition on the cluster.
Currently the main cluster is running CentOS 8.1 and the legacy nodes are running CentOS 7.7
The following legacy applications are supported:
ANSYS products v18.2, v19.5, v20.2
Abaqus 2021
You can access the legacy software modules by using the command:
module use /apps/common/legacy/modules
You may then use the module avail command to find the application you require.
Example Submission Scripts
Fluent Example
#!/bin/bash
#SBATCH --partition=legacy
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=48
#SBATCH --time=00:10:00
#SBATCH --job-name=FluentTest
module use /apps/common/legacy/modules
module load fluent/18.2
srun hostname > hostfile.txt
fluent 2d -g -ssh -t${SLURM_NTASKS} -pinfiniband -mpi=intel -cnf=hostfile.txt -i cav.inp
For Fluent 19.5 change the module load in the above example to:
module load fluent/2019R3
For Fluent 20.2 change the module load to:
module load fluent/2020R2
Abaqus Example
#!/bin/bash
#SBATCH --partition=legacy
#SBATCH --nodes=2
#SBATCH --ntasks-per-node=48
#SBATCH --time=12:00:00
#SBATCH --job-name=AbaqusTest
module use /apps/common/legacy/modules
module load Abaqus/2021
module load iimpi/2020a
. abaqus.sh
abaqus fetch job=s4b.inp
abaqus input=s4b job=test cpus=${SLURM_NTASKS} interactive
Please note: The line ". abaqus.sh" in the above script is important, it ensures that Abaqus is configured correctly for the ARC environment by creating a file named abaqus_v6.env in the job directory. It also creates a scratch directory for temporary Abaqus files. The example above also loads the iimpi/2020a module which we use to override the older MPI libraries supplied.
