From: <nfsmailinglist@heessels.com>
Subject: RE: 'random' diskless clients hangs
Date: Fri, 5 Sep 2003 21:14:05 +0200
Sender: nfs-admin@lists.sourceforge.net
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References: <482A3FA0050D21419C269D13989C6113D06C13@lavender-fe.eng.netapp.com>
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To: <nfs@lists.sourceforge.net>
In-Reply-To: <482A3FA0050D21419C269D13989C6113D06C13@lavender-fe.eng.netapp.com>
Errors-To: nfs-admin@lists.sourceforge.net

AMAZING: I switched the server from UDP to TCP... same crashes... :-(

There is only 1 server and 2 clients in the setup. All connected via eth1
100Mbps through a Cisco switch. No other traffic on this switch.
Here are the stats you requested... normal results?

[root@blue root]# nfsstat -c
Client rpc stats:
calls      retrans    authrefrsh
1119581    5          0


[root@aqua pxelinux.cfg]# netstat -s
Ip:
    42501380 total packets received
    0 forwarded
    0 incoming packets discarded
    42501269 incoming packets delivered
    29067258 requests sent out
    5 reassemblies required
    2 packets reassembled ok
    468 fragments created


-----Original Message-----
From: Lever, Charles [mailto:Charles.Lever@netapp.com]
Sent: vrijdag 5 september 2003 21:02
To: nfsmailinglist@heessels.com
Subject: RE: [NFS] 'random' diskless clients hangs


is your network clean?  UDP is pretty sensitive to
networking problems -- look for reassembly errors
in 'netstat -s', and retransmission count in 'nfsstat -c'.

> -----Original Message-----
> From: nfsmailinglist@heessels.com [mailto:nfsmailinglist@heessels.com]
> Sent: Friday, September 05, 2003 2:46 PM
> To: nfs@lists.sourceforge.net
> Subject: RE: [NFS] 'random' diskless clients hangs
>
>
> The clients still hang every few hours. There is nothing in the logs.
> When we change the rsize and wsize to 2048, the cleint no
> longer crash but
> clients and server because extremely slow.
>
> Please help! We are willing to pay a fee, by the way, if someone is
> interested in take a good hard look at our problem.
>
> This is our setup:
>
> SERVER:
> =======
>
> Linux Red Hat 7.3 kernel 2.4.18-27.7.x
> nfs-utils-1.0.5-1
>
> netboot settings:
> label linux
>   kernel vmlinuz
>   ipappend 1
>   append   root=/dev/nfs
> nfsroot=192.168.1.112:/clients/%s/root,v3,nolock,intr,rsize=40
> 96,wsize=4096
>
> exports:
> /clients/blue/root
> 192.168.1.160/255.255.255.255(rw,no_root_squash,sync)
>
> CLIENTS:
> ========
>
> Linux Red Hat 7.3 kernel 2.4.20-18.7custom
> nfs-utils-1.0.5-1
>
> fstab:
> 192.168.1.112:/clients/blue/root                /           nfs
> rw,nfsvers=3,hard,intr,udp,nolock   0 0
>
>
> -----Original Message-----
> From: nfs-admin@lists.sourceforge.net
> [mailto:nfs-admin@lists.sourceforge.net]On Behalf Of Bernd Schubert
> Sent: woensdag 3 september 2003 21:03
> To: nfsmailinglist@heessels.com; nfs@lists.sourceforge.net
> Subject: Re: [NFS] 'random' diskless clients hangs
>
>
> On Wednesday 03 September 2003 11:33,
> nfsmailinglist@heessels.com wrote:
> > Hello,
> >
> > We have a setup with a NFS V3 Fileserver and diskless
> clients all running
> > Red Hat 7.3.
> >
> > All clients run fine for days at a time, but every now and
> then a client
> > hangs. Most of the time the process that is porbably
> causing the hang is
> > either rhn_check (from Red Hat Network) or httpsd with user
> psaadm (from
> > Plesk 6.0.1).
> >
> > Since we are new to NFS we're not sure how to track down
> this problem. Any
> > help would be VERY much appreciated!
> >
>
> Hello,
>
> we are also using diskless clients but have never seen
> something like this,
> though none of your hanging programs is running on your systems.
> Is there anything in the logs? Which kernel-versions are you
> using? If you
> are
> using redhat kernel you should try a vanilla kernel (2.4.21
> *NOT* 2.4.22).
>
> Btw, how is your diskless setup working? Perhaps there's
> something wrong?
>
> Regards,
> 	Bernd
>
>
>
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