From owner-freebsd-stable@FreeBSD.ORG Thu Apr 28 21:31:25 2011 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 B7B4E1065778 for ; Thu, 28 Apr 2011 21:31:25 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 8B75D8FC08 for ; Thu, 28 Apr 2011 21:31:25 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 313EF46B51; Thu, 28 Apr 2011 17:31:25 -0400 (EDT) Received: from jhbbsd.localnet (unknown [209.249.190.124]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id B0ED28A027; Thu, 28 Apr 2011 17:31:24 -0400 (EDT) From: John Baldwin To: freebsd-stable@freebsd.org Date: Thu, 28 Apr 2011 17:27:04 -0400 User-Agent: KMail/1.13.5 (FreeBSD/8.2-CBSD-20110325; KDE/4.5.5; amd64; ; ) References: <537A8F4F-A302-40F9-92DF-403388D99B4B@gsoft.com.au> <20110428195601.GA31807@icarus.home.lan> In-Reply-To: <20110428195601.GA31807@icarus.home.lan> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201104281727.04425.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.6 (bigwig.baldwin.cx); Thu, 28 Apr 2011 17:31:24 -0400 (EDT) Cc: Jeremy Chadwick Subject: Re: ZFS vs OSX Time Machine 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: Thu, 28 Apr 2011 21:31:25 -0000 On Thursday, April 28, 2011 3:56:01 pm Jeremy Chadwick wrote: > On Thu, Apr 28, 2011 at 11:33:22PM +0930, Daniel O'Connor wrote: > > Does anyone else use ZFS to store TM backups? > > > > I find that whenever my laptop (over wifi!) starts a TM the ZFS machine it's backing up to grinds to a halt.. Other systems streaming stuff over NFS from it also tend to stall.. > > > > I presume that TM is doing something which causes ZFS some issues but I'm not sure how to find out what the real problem is let alone how to fix it.. > > > > I am running FreeBSD midget.dons.net.au 8.2-PRERELEASE FreeBSD 8.2- PRERELEASE #8 r217094M: Sat Jan 8 11:15:07 CST 2011 darius@midget.dons.net.au:/usr/obj/usr/src/sys/MIDGET amd64 > > > > It is a 5 disk RAIDZ1 with 1.29Tb free using WD10EADS drives. > > > > I don't see any SMART errors or ZFS warnings. > > > > I have the following ZFS related tunables > > > > vfs.zfs.arc_max="3072M" > > vfs.zfs.prefetch_disable="1" > > vfs.zfs.txg.timeout=5 > > vfs.zfs.cache_flush_disable=1 > > Are the last two actually *working* in /boot/loader.conf? Can you > verify by looking at them via sysctl? AFAIK they shouldn't work, since > they lack double-quotes around the values. Parsing errors are supposed > to throw you back to the loader prompt. See loader.conf(5) for the > syntax. Huh? I use values without quotes all the time in loader.conf. -- John Baldwin