From owner-freebsd-questions@FreeBSD.ORG  Fri May  3 12:09:27 2013
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id DE02B80C
 for <freebsd-questions@freebsd.org>; Fri,  3 May 2013 12:09:27 +0000 (UTC)
 (envelope-from bah@bananmonarki.se)
Received: from feeder.usenet4all.se (1-1-1-38a.far.sth.bostream.se
 [82.182.32.53]) by mx1.freebsd.org (Postfix) with ESMTP id 6B60C1C4D
 for <freebsd-questions@freebsd.org>; Fri,  3 May 2013 12:09:25 +0000 (UTC)
Received: from kw.news4all.se (localhost [127.0.0.1])
 by feeder.usenet4all.se (8.13.1/8.13.1) with ESMTP id r43C9Gb3008698;
 Fri, 3 May 2013 14:09:17 +0200 (CEST)
 (envelope-from bah@bananmonarki.se)
Message-ID: <5183A8BA.7040309@bananmonarki.se>
Date: Fri, 03 May 2013 14:08:26 +0200
From: Bernt Hansson <bah@bananmonarki.se>
User-Agent: Mozilla/5.0 (X11; FreeBSD i386;
 rv:17.0) Gecko/20130321 Thunderbird/17.0.4
MIME-Version: 1.0
To: Daniel Feenberg <feenberg@nber.org>
Subject: Re: Restarting exports disturbs clients
References: <alpine.LRH.2.03.1305021137480.32731@nber.org>
In-Reply-To: <alpine.LRH.2.03.1305021137480.32731@nber.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 03 May 2013 12:09:27 -0000

2013-05-03 12:49, Daniel Feenberg skrev:
>
> When we change the exportfs file on our FreeBSD 9.1 fileserver:
>
>    kill -HUP `cat /var/run/mountd.pid`

That seems a bit harsh, try /etc/rc.d/nfsd restart or
/etc/nfsserver restart.

> it kills the jobs on  clients that have files open on the fileserver.
> This is pretty inconvenient for users (and us). Is there a way around
> this? We have noticed that a Linux fileserver can restart nfs without
> distrubing clients (other than a short pause). The Linux restart
> doesn't restart the locking mechanism - is that the difference? We
> could do without locks, even without NFSv4, for that matter, if it
> would let us change exports without disturbing users. Perhaps there
> there is an NFS shutdown procedure that we should be using?
>
> Daniel Feenberg
> NBER