Skip site navigation (1)Skip section navigation (2)
Date:      Thu, 03 May 2007 10:55:29 -0400
From:      Chuck Swiger <cswiger@mac.com>
To:        Janos Dohanics <web@3dresearch.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: NFS server not responding/is alive again
Message-ID:  <4639F7E1.3010102@mac.com>
In-Reply-To: <ik9RsYVj.1178149799.6484140.janos@imap.3dresearch.com>
References:  <ik9RsYVj.1178149799.6484140.janos@imap.3dresearch.com>

Next in thread | Previous in thread | Raw E-Mail | Index | Archive | Help
Hi--

Janos Dohanics wrote:
> I have a FreeBSD 4.11 machine which mounts a volume from a Netapp ONTap.
> The FreeBSD machine also acts as a Samba PDC. The Samba volumes are in
> the NFS-mounted volume. There are about a dozen Win2K workstations on
> the network served by the Samba server.
> 
> Lately I have noticed that /var/log/messages is full with entries like:
> 
> ... /kernel: nfs server filer01:/vol/vol0/psa: not responding
> ... /kernel: nfs server filer01:/vol/vol0/psa: is alive again
> 
> It seems that the server sometimes is unresponsive for less than a
> second, many other times it's unresponsive for a number of seconds (as
> many as 8 seconds).

In order to proceed, it would help to run a tcpdump between the NFS server and 
this FreeBSD machine, and take a look at the packets just before one of these 
errors is logged, and try to correlate with anything else in your logs (ie, a 
particular Samba client did something or saw an error as a result).

Use something like:

   tcpdump -w packet.dmp -s 0 host filer01 and host localhost

... and read via "tcpdump -r packet.dmp".

Note that Samba is going to be happier serving from local disks; it would be 
better for the clients to mount against filer01 directly than to "forward" a 
remote filesystem via this NFS->CIFS/SMB bridge...

-- 
-Chuck




Want to link to this message? Use this URL: <http://docs.FreeBSD.org/cgi/mid.cgi?4639F7E1.3010102>