Chester 2019: Difference between revisions

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Revision as of 10:56, 22 October 2019

Lectures

DFT, PW, and PAW: "VASP: The basics(1). DFT, plane waves, PAW, ...".

electronic convergence, BZ sampling: "VASP: The basics(2). electronic convergence, BZ sampling ...".

Hybrid functionals: "VASP: Hybrid functionals".

Dielectric properties: "VASP: Dielectric response. Perturbation theory, linear response, and finite electric fields".

Beyond DFT: RPA: "VASP: beyond DFT. The Random-Phase-Approximation".

Performance: "VASP: running on HPC resources".

Allocating Computing Nodes and Environment Setup

An interactive shell should be allocated after login. The following command allocates an interactive node with 8 CPUs for 4 hours

qsub -IVXl select=1:ncpus=8,walltime=4:0:0,place=scatter:excl -A y15

After successful allocation, one has to setup the environment as follows.

To have access to the vasp binaries, the corresponding module has to be loaded into the environment. Furthermore, the job scripts found in the tutorial tar files (job.sh, doall.sh, etc) work only if the environment variables "vasp_std, vasp_gam, vasp_ncl" are defined. Enter following commands in the terminal window after login, to setup up the environment.

module load vasp
export vasp_std="mpirun -ppn 8 -np 8 /lustre/home/y07/vasp5/5.4.4-intel17-mpt214/bin/vasp_std"
export vasp_gam="mpirun -ppn 8 -np 8 /lustre/home/y07/vasp5/5.4.4-intel17-mpt214/bin/vasp_gma"
export vasp_ncl="mpirun -ppn 8 -np 8 /lustre/home/y07/vasp5/5.4.4-intel17-mpt214/bin/vasp_ncl"

Submitting jobs

Alternative to an interactive shell, one may submit jobs to the cluster as follows

qsub vasp.job

where the jobfile "vasp.job" reads

#!/bin/bash --login

#PBS -N VASP-Test
#PBS -l select=1:ncpus=36
#PBS -l place=scatter:excl
#PBS -l walltime=00:30:00
#PBS -A y15 

cd $PBS_O_WORKDIR 
module load vasp
mpiexec_mpt -ppn 36 -n 36 vasp_std | tee vasp.out

Tutorials

For the beginners: A short introduction to the common Input and Output files.

Further Examples