NFS question

[Keith Underwood]

Actually, that is possible.  Well, it used to be at least.  You need to
turn on "emulate Sun NFS server" support in the kernel.  Sun used to let
you re-export (maybe still does?) an NFS drive and Linux 2.2 also supports
that.  I don't see the support in 2.4.  Now, don't expect it to PERFORM
well, but it is (or was) possible.

					Keith

On Fri, 13 Jul 2001, Christoph Wasshuber wrote:

> I have a fundamental NFS question. Assume
> that we have three computers, X, HEAD, NODE1.
>
> 	X ----- HEAD ----- NODE1
>
>       /vol      /mnt/v1    /mnt/v2
>
> X     is some computer on a larger network
> HEAD  is also member of this larger network and
>       knows about X and NODE1
> NODE1 is one of my beowulf nodes and does not
>       know anything about the larger network.
>
> NODE1 does not know anything about X and X likewise
> does not know anything about NODE1. The HEAD knows
> both X and NODE1.
>
> Assume further that X exported his /vol directory
> and HEAD has mounted it on /mnt/v1. Everything is
> fine and working well. HEAD can access X:/vol by
> looking into /mnt/v1
>
> Now my question:
> Can NODE1 mount HEAD:/mnt/v1 so that NODE1 can
> access X:/vol by looking into his /mnt/v2?
>
> In other words can one mount a mounted directory?
>
> I would be very glad if somebody could enlighten
> me on this issue, because I have tried it and
> it does not work. But maybe I am doing something
> wrong.
>
> Chris....
>
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---------------------------------------------------------------------------
Keith Underwood                   Parallel Architecture Research Lab (PARL)
keithu at parl.clemson.edu                                  Clemson University