[NFS] NFS clients behind a masqueraded gateway

[Robert Konecny]

Hi Steffen,

you're probably hitting NAT timeouts and NFS clients don't handle this 
well. We have the same setup on our cluster but we are using automountd on 
our NFS mounted directories - which works nicely around this problem.

cheers,

robert


On Thu, Apr 25, 2002 at 09:02:44PM +0200, Steffen Persvold wrote:
> Hi Wulfers,
> 
> I'm taking the liberty to post my question here as well since it might be
> relevant for some of you and you might have some experience with this.
> 
> I've also posted the mail to the NFS mailing list, but I haven't gotten
> any answers (yet).
> 
> Any pointers to what the problem might be are higly appreciated.
> 
> On Thu, 18 Apr 2002, Steffen Persvold wrote:
> 
> > Hi all,
> >
> > I'm experiencing some problems with a cluster setup. The cluster is set up
> > in a way that you have a frontend machine configured as a masquerading
> > gateway and all the compute nodes behind it on a private network (i.e the
> > frontend has two network interfaces). User home directories and also other
> > data directories which should be available to the cluster (i.e statically
> > mounted in the same location on both frontend and nodes) are located on
> > external NFS servers (IRIX and Linux servers). This seems to work fine
> > when the cluster is in use, but if the cluster is idle for some time (e.g
> > over night), the NFS directories has become unavailable and trying to
> > reboot the frontend results in a complete hang when it tries to unmount
> > the NFS directories (it hangs in a fuser command). The frontend and all
> > the nodes are running RedHat 7.2, but with a stock 2.4.18 kernel (plus
> > Trond's seekdir patch, thanks for the help BTW).
> >
> > Ideas anyone ?
> >
> > Thanks in advance,
> >
> 
> 
> Best regards,
> Steffen
> 
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