What is Global File System (GFS)?
A global file system (GFS), in computer science, is a cluster of files that are accessed, stored, and retrieved between a number of computers and systems from which data or services are shared. The computer systems can be physically remote or part of the same network.
GFS is particularly useful when two or more computers are physically located in remote locations and they cannot directly share a file or group of files. A global file system stores changes made by a system and displays the changes on all systems that share it.
It's the same as a distributed file system, except that the nodes have direct access to the data. A GFS reads and writes to the remote device much like a local file system and allows computers to organize their I / O to maintain file system consistency.