[ Thanks to An Anonymous Reader for
this link. ]
“A uniform file system namespace enables access to files from
different clients under one global mounted directory. When file
data is exported from distributed Network File System (NFS) file
servers, it eliminates the need to explicitly mount file systems
from each file server manually. NFS Version 4 provides a file
server referrals feature where a file system namespace is created
by mounting a directory exported from one file server and, if the
actual data resides on another file server, clients are re-directed
accordingly. NFS Version 3 lacks this feature, making it cumbersome
to access data exported from multiple file servers under the same
global mount point…”