From owner-freebsd-questions@FreeBSD.ORG Thu May 3 16:11:26 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3B70116A400 for ; Thu, 3 May 2007 16:11:26 +0000 (UTC) (envelope-from web@3dresearch.com) Received: from smtp.3dresearch.com (dorabella.3dresearch.com [66.167.251.2]) by mx1.freebsd.org (Postfix) with ESMTP id 0BE7A13C455 for ; Thu, 3 May 2007 16:11:25 +0000 (UTC) (envelope-from web@3dresearch.com) Received: from cherubino.3dresearch.com (27.mars6.xdsl.nauticom.net [209.195.153.252]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by vmail.3dresearch.com (Postfix) with ESMTP id D910470A38; Thu, 3 May 2007 12:11:24 -0400 (EDT) Received: from doncurzio.3dresearch.com (doncurzio.3dresearch.com [10.61.70.3]) by cherubino.3dresearch.com (Postfix) with ESMTP id 74AB7550D; Thu, 3 May 2007 12:11:23 -0400 (EDT) Message-Id: <6.2.1.2.0.20070503120209.041d8700@imap.telissant.com> X-Mailer: QUALCOMM Windows Eudora Version 6.2.1.2 Date: Thu, 03 May 2007 12:13:25 -0400 To: Chuck Swiger From: web@3dresearch.com In-Reply-To: <4639F7E1.3010102@mac.com> References: <4639F7E1.3010102@mac.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Cc: freebsd-questions@freebsd.org Subject: Re: NFS server not responding/is alive again X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 May 2007 16:11:26 -0000 At 10:55 AM 5/3/2007, you wrote: >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". Chuck, I did tcpdump -w packet.dmp -s 0 host filer01 and host localhost for a couple of minutes: # tcpdump -w packet.dmp -s 0 host filer01 and host localhost tcpdump: listening on dc0 ^C 639 packets received by filter 0 packets dropped by kernel ... tcpdump -r packet.dmp gives zero output. What does this tell you? >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... I'm sure you are right and I'd change it given the opportunity... Janos