From: Steffen Persvold <sp@scali.com>
Subject: Re: NFS clients behind a masqueraded gateway
Date: Thu, 25 Apr 2002 19:24:52 +0200 (CEST)
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Hi again,

I hate to bother you guys again with this problem, but do you have any
ideas (haven't received any response so far) ?

Answers highly 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,
>

Regards,
-- 
  Steffen Persvold   | Scalable Linux Systems |   Try out the world's best
 mailto:sp@scali.com |  http://www.scali.com  | performing MPI implementation:
Tel: (+47) 2262 8950 |   Olaf Helsets vei 6   |      - ScaMPI 1.13.8 -
Fax: (+47) 2262 8951 |   N0621 Oslo, NORWAY   | >320MBytes/s and <4uS latency


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