[mythtv-users] Shared filesystem that looks different to different machines

jedi jedi at mishnet.org
Wed Jun 4 17:48:20 UTC 2014


On Wed, Jun 04, 2014 at 06:00:07PM +0100, Mike Perkins wrote:
> On 04/06/14 16:20, Raymond Wagner wrote:
> >On 6/4/2014 10:53 AM, Joseph Fry wrote:
> >>I don't believe that NFS would have any issue with nesting a mount inside
> >>another mount like this, after all the OS just treats it as another filesystem
> >>and every linux system I have ever seen does this (/dev, /proc, etc).
> >
> >NFS can have issues if you mount one NFS volume within another NFS volume.  If
> >access to the lower volume is ever anything but 100% stable, and the mount point
> >for the upper volume is lost, bad things happen. It's the same reason why you
> >never use an NFS share for swap space.
> >
> Actually NFSv4 almost forces this structure on you. You have to have
> a kind of "root" NFS share which has a magic ID of zero (forget the
> exact incantation) and then all the other shares you actually want
> to make are forced under that share with appropriate filesystem
> linkages and permissions.
> 
> I could never get this working. Ever.

     I have done nested NFS mounts forever and now am running NFSv4 with
the same setup because of an upgrade I did to my fileserver that didn't
go quite as planned.



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