Vasp 5.4.4 Installation Official

export OMP_NUM_THREADS=2 mpirun -np 16 vasp_std # 16 MPI ranks, each with 2 OpenMP threads Adjust for your node's core count. Ensure your makefile.include uses fft3dlib.o from VASP’s own library, not generic FFTW. The template above already uses the optimized internal FFT. 3. Memory optimization For large systems (>100 atoms), add to INCAR :

Introduction: Why VASP 5.4.4 Still Matters VASP (Vienna Ab initio Simulation Package) is one of the most widely used software packages for electronic structure calculations and quantum-mechanical molecular dynamics. While newer versions (5.4.4+, 6.x) exist, version 5.4.4 remains a popular "stable classic" – robust, extensively benchmarked, and compatible with a vast ecosystem of post-processing tools (VASPKIT, VESTA, p4vasp, etc.). vasp 5.4.4 installation

mkdir ~/vasp_test cd ~/vasp_test cp ../vasp.5.4.4/vasp_std . Copy example input files from the VASP tarball testsuite/ : export OMP_NUM_THREADS=2 mpirun -np 16 vasp_std # 16

ls ../vasp_std, gam, ncl Quick test with a simple NaCl calculation Create a test directory: mkdir ~/vasp_test cd ~/vasp_test cp

sudo apt update sudo apt install build-essential gfortran wget perl libssl-dev For RHEL/CentOS:

LLIBS = $(SCALAPACK) $(LAPACK) $(BLAS) USE_ACCEL = no

cp ~/software/vasp.5.4.4/testsuite/tests/si_base/POSCAR . cp ~/software/vasp.5.4.4/testsuite/tests/si_base/INCAR . cp ~/software/vasp.5.4.4/testsuite/tests/si_base/KPOINTS . cp ~/software/vasp.5.4.4/testsuite/tests/si_base/POTCAR_Si . mv POTCAR_Si POTCAR Run on 4 cores: