Even though IBM is really great at pushing and marketing GPFS, a lot of the marketing is just straight up lying:
What is IBM SpectrumScale / GPFS. SpectrumScale, initially called GPFS, was developed over 25 years ago as the enterprise’s first distributed software storage solution. The primary purpose was to coordinate the concurrent access to a SAN (storage area network, see here) from many clients.
IBM “General Parallel File System” was created in 1998 for AIX and 2001 for Linux.
Why lying? Because GPFS came out 14 years after NFS. In fact, it’s quite clear at this point that IBM essentially stole the best ideas of NFS from Sun (and later Linux) to create GPFS.
Bottom line: never, ever trust a company that brags about its patents every year to provide any honesty in their product offerings.
What is NFS | Learn the Working and Versions of NFS
https://www.educba.com/what-is-nfs/
Whither NFS » Linux Magazine
https://www.linux-magazine.com/Issues/2016/191/Whither-NFS
What Is Nfs In Linux? - OS Today
https://frameboxxindore.com/linux/what-is-nfs-in-linux.html
How to find NFS version
https://www.thegeeksearch.com/how-to-find-nfs-version/