[alerighi]

Well I don't see how FUSE is broken, while NFS surely is (it happened to me that I had processes that were in a state that was impossible to terminate without rebooting - this was because they did set locks in the NFS filesystem that they were never released, thus not allowing the processes PID to terminate and thus generating a slow resource leak in the kernel!)

Anyway, FUSE is more efficient, since the application directly talks to the kernel, without passing trough the TCP/IP stack and the NFS driver. It cannot be possibly implemented more efficiently without implementing the FS as a proper kernel module.

Also NFS introduces a security problem: authentication is tricky to implement, and I don't think it's used in this application: that allows any user on the computer to access, via the NFS API trough an userspace implementation the filesystem, bypassing any permission of the filesystem itself.

Finally NFS cannot support (as far as I know) all the features that are possible with a FUSE filesystem. And since it's based on a network protocol (meaning client and server may be on different machines with a non reliable network connecting them) something will probably never be supported/work reliably (for example inotify).