I found that there are two binary files named "vdw_kernel.bindat" and "vdw_kernel.bindat.big_endian" in the VASP 6.3 program. While in VASP 5.4.4 there is only one "vdw_kernel.bindat" file.
Since these two files are not human-readable. I would like to know what's the difference between the "vdw_kernel.bindat" and "vdw_kernel.bindat.big_endian"?
Which one should I choose? Thanks.
Rémi Pasquier
As the name suggests, one is for little endian machines and the other one is for big endian machines.
Basically, this has to do with how bits are stored in memory, and it depends on the machine you are using, so you need to check the endianness of your machine and use the correct kernel.
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