SIESTA is both a method and its computer program implementation, to perform efficient electronic structure calculations and ab initio molecular dynamics simulations of molecules and solids. More information can be found from here.
SIESTA is available on the Owens and Oakley clusters. A serial and a parallel build were created in order to meet users' computational needs.
The SIESTA program is distributed freely to academics. Use of SIESTA for academic purposes requires validation. In order to obtain validation, please contact OSC Help for further insruction. Commercial users need to show proof of license in order to use SIESTA at OSC.
When you log into oakley.osc.edu or owens.osc.edu, you are actually logged into a linux box referred to as the login node. To gain access to the 4000+ processors in the computing environment, you must submit your SIESTA job to the batch system for execution.
Assume that you have a test case in your work directory (where you submit your job, represented by
$PBS_O_WORKDIR), with the input file 32_h2o.fdf. A batch script can be created and submitted for a serial or parallel run. The following are the sample batch scripts for running serial and parallel SIESTA jobs.
#PBS -l walltime=0:30:00 #PBS -l nodes=1:ppn=12 #PBS -N siesta #PBS -j oe # cd $PBS_O_WORKDIR # # Set up the package environment module load siesta # # Execute the serial solver (nodes=1, ppn<=12) siesta <32_h2o.fdf> output exit
#PBS -l walltime=0:30:00 #PBS -l nodes=2:ppn=12 #PBS -N siesta #PBS -j oe # cd $PBS_O_WORKDIR # # Set up the package environment module swap intel/126.96.36.1999 intel/188.8.131.52 module load siesta_par # # Execute the parallel solver (nodes>1, ppn=12) mpiexec -np 24 siesta <32_h2o.fdf> output exit
Online documentation is available at: http://departments.icmab.es/leem/siesta/Documentation/index.html.
1. “Self-consistent order-N density-functional calculations for very large systems”, P. Ordejón, E. Artacho and J. M. Soler, Phys. Rev. B (Rapid Comm.) 53, R10441-10443 (1996).
2. “The SIESTA method for ab initio order-N materials simulation”, J. M. Soler, E. Artacho,J. D. Gale, A. García, J. Junquera, P. Ordejón, and D. Sánchez-Portal, J. Phys.: Condens. Matt. 14, 2745-2779 (2002).