Before you start, understand the following concepts.
Network File System (NFS) is a distributed file system protocol that allows different computers and operating systems to share data over a network.
A file system provides users with shared file storage through NFS. It allows remote access to files on the network. After you create a file system on the console, you can mount it on multiple cloud servers and access it from these servers through POSIX.
Portable Operating System Interface (POSIX) is a set of interrelated standards specified by Institute of Electrical and Electronics Engineers (IEEE) to define the application programming interface (API) for software compatible with variants of the UNIX operating system. POSIX is intended to achieve software portability at the source code level. That is, a program written for a POSIX compatible operating system may be compiled and executed on any other POSIX operating system.