Date: Thu, 28 Apr 2011 17:27:04 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-stable@freebsd.org Cc: Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: ZFS vs OSX Time Machine Message-ID: <201104281727.04425.jhb@freebsd.org> In-Reply-To: <20110428195601.GA31807@icarus.home.lan> References: <537A8F4F-A302-40F9-92DF-403388D99B4B@gsoft.com.au> <20110428195601.GA31807@icarus.home.lan>
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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
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