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NFS File System Model and the Mount Protocol
(Page 1 of 3)
Since NFS is used by a client to
simulate access to remote directories of files as if they were local,
the protocol must present the files from the remote system
to the local user. Just as files on a local storage device are arranged
using a particular file system, NFS too uses a file system model
to represent how files are shown to a user.
The NFS File System Model
The file system model used by NFS
is the same one that most of us are familiar with: a hierarchical arrangement
of directories that contain files and subdirectories. The top of the
hierarchy is the root, which contains any number of files and
first level directories. Each directory may contain more files or other
directories, allowing an arbitrary tree structure to be created.
A file can be uniquely specified
by using its file name and a path name that shows the
sequence of directories one must traverse from the root to find the
file. Since NFS is associated with UNIX, files in NFS discussions are
usually shown in UNIX notation; for example, /etc/hosts.
The same basic tree idea can also be expressed using the method followed
by Microsoft operating systems: C:\WINDOWS\HOSTS.
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The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
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