User-space NFSv3 Server
UNFS3 is a user-space implementation of the NFSv3 server
specification. It provides a daemon for the MOUNT and NFS
protocols, which are used by NFS clients for accessing files on
The goals of the UNFS3 project are, in order of importance:
- Correctness: it should implement the semantics of
NFSv3 as closely as possible. It should also detect races with
local file system activity on the server.
- Portability: it should run on any Unix-like operating
system. So far, it is known to work on Linux and
- Completeness: it should support all aspects of the
NFSv3 specification, within the limits possible from user-
- Performance: it should be as fast as possible. It is
impossible to outmatch in-kernel NFS servers from user-space,
but UNFS3 should not lag too far behind.
So far, UNFS3 passes the basic and general tests of the
Connectathon 2004 NFS testsuite and survives fsx stress testing.
The tests were run on Linux using the in-kernel NFS client.
You can use the links on the left to download the latest version
of UNFS3 from GitHub. Please visit the
GitHub project page
for more information about the project.
unfs3 git repository
is hosted on GitHub.