FedFs is a set of file system federation protocols that
enable file access and namespace traversal across collections of
independently administered fileservers. The protocol specifies a set
of interfaces by which fileservers and collections of fileservers
with different administrators can form a fileserver federation that
provides a namespace composed of the filesystems physically hosted on
and exported by the constituent fileservers.
This sourceforge project
provides an implementation of a FedFs Namespace Database (NSDB).