[RFC,PATCH 0/4] Dynamic Pseudo Root

[Neil Brown]

On Monday December 10, chuck.lever at oracle.com wrote:
> > Question: How often are do people run multiple rpc.mountd daemons and
> > for what reason?
> 
> 
> I don't know the answer to that question, but the mount command has  
> options to use different RPC versions and program numbers when  
> contacting the mountd on an NFS server, ostensibly to allow server  
> admins to provide unique NFS services on the same server.

I had alway assumed that was to allow multiple implementations of nfs.
e.g. you could be using knfsd and the rest of nfs-utils to export some
filesystems, and unfsd (or some other user-space nfsd) to export some
other data.

I cannot see any way to usefully run two independent instances of the
nfs-utils mountd on the same host....

Hmmm.  I wonder if the current multi-virtual-namespace craze is going
to hit nfsd and want us to support multiple independent nfsds on the
one host (presumably with separate IP addresses etc).  I guess we
could arrange that if the nfsd filesystem were mounted in different
places (or in different namespaces) it provided independent caches
.... I think I'll decide that is someone else's problem :-)

NeilBrown