From owner-freebsd-stable@FreeBSD.ORG Wed Jan 6 20:48:11 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 68051106566C for ; Wed, 6 Jan 2010 20:48:11 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from esa-annu.mail.uoguelph.ca (esa-annu.mail.uoguelph.ca [131.104.91.36]) by mx1.freebsd.org (Postfix) with ESMTP id 1E5138FC1A for ; Wed, 6 Jan 2010 20:48:10 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApoEAJOFREuDaFvJ/2dsb2JhbADTcIQwBA X-IronPort-AV: E=Sophos;i="4.49,231,1262581200"; d="scan'208";a="60222285" Received: from ganges.cs.uoguelph.ca ([131.104.91.201]) by esa-annu-pri.mail.uoguelph.ca with ESMTP; 06 Jan 2010 15:48:10 -0500 Received: from localhost (localhost.localdomain [127.0.0.1]) by ganges.cs.uoguelph.ca (Postfix) with ESMTP id 3ADFCFB80BA; Wed, 6 Jan 2010 15:48:10 -0500 (EST) X-Virus-Scanned: amavisd-new at ganges.cs.uoguelph.ca Received: from ganges.cs.uoguelph.ca ([127.0.0.1]) by localhost (ganges.cs.uoguelph.ca [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0SS0oHt+KScN; Wed, 6 Jan 2010 15:48:09 -0500 (EST) Received: from muncher.cs.uoguelph.ca (muncher.cs.uoguelph.ca [131.104.91.102]) by ganges.cs.uoguelph.ca (Postfix) with ESMTP id D78A1FB8063; Wed, 6 Jan 2010 15:48:09 -0500 (EST) Received: from localhost (rmacklem@localhost) by muncher.cs.uoguelph.ca (8.11.7p3+Sun/8.11.6) with ESMTP id o06Kw5C02602; Wed, 6 Jan 2010 15:58:05 -0500 (EST) X-Authentication-Warning: muncher.cs.uoguelph.ca: rmacklem owned process doing -bs Date: Wed, 6 Jan 2010 15:58:05 -0500 (EST) From: Rick Macklem X-X-Sender: rmacklem@muncher.cs.uoguelph.ca To: alan bryan In-Reply-To: <700718.76026.qm@web50501.mail.re2.yahoo.com> Message-ID: References: <700718.76026.qm@web50501.mail.re2.yahoo.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-stable@freebsd.org Subject: Re: Zombie NFS writing from FreeBSD clients to FreeBSD 8.0 server with ZFS X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Jan 2010 20:48:11 -0000 On Wed, 6 Jan 2010, alan bryan wrote: > I have a AMD64 FreeBSD 8.0 server with ZFS filesystem being shared via NFS. These are being accessed by the clients. The clients are a mix of FreeBSD 6.2 32bit and FreeBSD 7.0 64bit. I have seen similar behavior from both versions of FreeBSD as clients. > > The behavior that I'm seeing is that everything is fine for a period of time and then the client starts "writing" large amounts of data to the NFS server. "Writing" is in quotes as nothing is actually being written to disk - this can go on for 12+ hrs or more - until the client is rebooted. It appears to cap out at around the 10-20Mbps rate and just sit there. Other clients are fine during this time. > > > Client mounts in /etc/fstab look like: > 192.168.1.33:/tank/share /usr/local/www/share nfs rw,-b,-i,-U,-3 0 0 > One other thing you could try is switching to TCP mounts (replace -U with -T). There are a couple of others that have reported NFS server problems (all different symptoms) where the problem went away when they switched to TCP. rick