On September 22nd, OSC switched to Slurm for job scheduling and resource management on the Pitzer Cluster, along with the deployment of the new Pitzer hardware. We are in the process of updating the example job scripts for each software. If a Slurm example is not yet available, please consult our general Slurm information page or contact OSC help.

LS-DYNA

LS-DYNA is a general purpose finite element code for simulating complex structural problems, specializing in nonlinear, transient dynamic problems using explicit integration. LS-DYNA is one of the codes developed at Livermore Software Technology Corporation (LSTC).

Availability and Restrictions

Versions

LS-DYNA is available on Owens and Oakley Clusters for both serial (smp solver for single node jobs) and parallel (mpp solver for multipe node jobs) versions. The versions currently available at OSC are:

Version Owens

9.0.1

smp  X
mpp X
10.1.0 smp X
mpp X
11.0.0 smp X*
mpp X*
* Current default version

You can use module spider ls-dyna to view available modules for a given machine. Feel free to contact OSC Help if you need other versions for your work.

Access for Academic Users

ls-dyna is available to academic OSC users with proper validation. In order to obtain validation, please contact OSC Help for further instruction.

Access for Commerical Users

Contact OSC Help for getting access to LS-DYNA if you are a commerical user.

Publisher/Vendor/Repository and License Type

LSTC, Commercial

Usage

Usage on Owens

Set-up on Owens

To view available modules installed on Owens, use  module spider ls-dyna for smp solvers, and use  module spider mpp for mpp solvers. In the module name, '_s' indicates single precision and '_d' indicates double precision. For example, mpp-dyna/971_d_9.0.1 is the mpp solver with double precision on Owens. Use  module load name to load LS-DYNA with a particular software version. For example, use  module load mpp-dyna/971_d_9.0.1 to load LS-DYNA mpp solver version 9.0.1 with double precision on Owens.

Batch Usage on Owens

When you log into owens.osc.edu you are actually logged into a linux box referred to as the login node. To gain access to the mutiple processors in the computing environment, you must submit your job to the batch system for execution. Batch jobs can request mutiple nodes/cores and compute time up to the limits of the OSC systems. Refer to Queues and Reservations and Batch Limit Rules for more info.  Batch jobs run on the compute nodes of the system and not on the login node. It is desirable for big problems since more resources can be used.

Interactive Batch Session

For an interactive batch session one can run the following command:

qsub -I -l nodes=1:ppn=28 -l walltime=00:20:00 
which requests one whole node with 28 cores (-l nodes=1:ppn=28), for a walltime of 20 minutes (-l walltime=00:20:00). You may adjust the numbers per your need.
Non-interactive Batch Job (Serial Run)

batch script can be created and submitted for a serial or parallel run. You can create the batch script using any text editor you like in a working directory on the system of your choice. Please follow the steps below to use LS-DYNA via the batch system:

1) copy your input files (explorer.k in the example below) to your work directory at OSC

2) create a batch script, similar to the following file, saved as job.txt. It uses the smp solver for a serial job (nodes=1) on Owens:

#PBS -N plate_test
#PBS -l walltime=5:00:00
#PBS -l nodes=1:ppn=28
#PBS -j oe
# The following lines set up the LSDYNA environment
module load ls-dyna/971_d_9.0.1
#
# Move to the directory where the input files are located
#
cd $PBS_O_WORKDIR
#
# Run LSDYNA (number of cpus > 1)
#
lsdyna I=explorer.k NCPU=28

 3) submit the script to the batch queue with the command: qsub job.txt.

 When the job is finished, all the result files will be found in the directory where you submitted your job ($PBS_O_WORKDIR). Alternatively, you can submit your job from the temporary directory ($TMPDIR), which is faster to access for the system and might be beneficial for bigger jobs. Note that $TMPDIR is uniquely associated with the job submitted and will be cleared when the job ends. So you need to copy your results back to your work directory at the end of your script. 

Non-interactive Batch Job (Parallel Run)
Please follow the steps below to use LS-DYNA via the batch system:

1) copy your input files (explorer.k in the example below) to your work directory at OSC

2) create a batch script, similar to the following file, saved as job.txt). It uses the mmp solver for a parallel job (nodes>1) on Owens:

#PBS -N plate_test
#PBS -l walltime=5:00:00
#PBS -l nodes=2:ppn=28
#PBS -j oe
# The following lines set up the LSDYNA environment
module load intel/18.0.3
module load intelmpi/2018.3
module load mpp-dyna/971_d_9.0.1
#
# Move to the directory where the input files are located
#
cd $PBS_O_WORKDIR
#
# Run LSDYNA (number of cpus > 1)
#
mpiexec mpp971 I=explorer.k NCPU=56

 3) submit the script to the batch queue with the command: qsub job.txt.

When the job is finished, all the result files will be found in the directory where you submitted your job ($PBS_O_WORKDIR). Alternatively, you can submit your job from the temporary directory ($TMPDIR), which is faster to access for the system and might be beneficial for bigger jobs. Note that $TMPDIR is uniquely associated with the job submitted and will be cleared when the job ends. So you need to copy your results back to your work directory at the end of your script. An example scrip should include the following lines:

...
cd $TMPDIR
cp $PBS_O_WORKDIR/explorer.k .
... #launch the solver and execute
pbsdcp -g '*' $PBS_O_WORKDIR

Further Reading

See Also

Supercomputer: 
Service: