Date: Tue, 4 Jan 2011 17:50:21 +0100 From: Freek van Hemert <fvhemert@gmail.com> To: Dan Langille <dan@langille.org> Cc: freebsd-stable@freebsd.org, Peter Jeremy <peterjeremy@acm.org>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: slow ZFS on FreeBSD 8.1 Message-ID: <AANLkTinHnyoY=cPk%2BoOEx=KbCvCw4AvUQygRn8qN-7qQ@mail.gmail.com> In-Reply-To: <4D20629D.2030803@langille.org> References: <AANLkTinfYync_BG3zV028Or4ZgHe5iQ2tLVd1mn4a0r%2B@mail.gmail.com> <4D1AF388.3080107@infracaninophile.co.uk> <AANLkTim2oV3phJ4bTFL_ENNZYknm7Gjt_3uFdMd1UpYd@mail.gmail.com> <4D1B7431.7070808@infracaninophile.co.uk> <4D1BD8D0.5010402@langille.org> <4D1C4A2D.4020206@infracaninophile.co.uk> <4D1C7929.3040809@langille.org> <20101231233343.GB48579@server.vk2pj.dyndns.org> <20101231234747.GA8171@icarus.home.lan> <4D20629D.2030803@langille.org>
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Thank you mailinglist, That was a lot of info. First of all, I don't think this is a cpu issue since the cpu is mostly idle while copying. Second, I tried the hacks in loader.conf and the other ones mentioned in the beginning of the thread. Allthough perfomance is somewhat increased, it is still horribly slow at something like 2.6MB/sec (my internet is faster.) For the moment I will put my FreeBSD plans back in the fridge, I thought ZFS would bring me instant performance and data safety without having to spend too much time. I'll move back to Arch Linux and just setup a rsync between the disks on ext4 or perhaps later I will move to btrfs. When 8,2 is stable who knows I might just switch again although as the disks fill it will be harder and harder... I will definitely revisit FreeBSD and zfs but this was not the time for me. Have a happy new year and thanks for all the comments. Freek. On 2 January 2011 12:33, Dan Langille <dan@langille.org> wrote: > On 12/31/2010 6:47 PM, Jeremy Chadwick wrote: > >> On Sat, Jan 01, 2011 at 10:33:43AM +1100, Peter Jeremy wrote: >> > > Based on my experiences at home, I converted my desktop at work to >>> pure ZFS. The only issues I've run into have been programs that >>> extensively use mmap(2) - which is a known issue with ZFS. >>> >> >> Is your ZFS root filesystem associated with a pool that's mirrored or >> using raidzX? What about mismatched /boot content (ZFS vs. UFS)? What >> about booting into single-user mode? >> >> http://wiki.freebsd.org/ZFSOnRoot indirectly hints at these problems but >> doesn't outright admit them (yet should), so I'm curious to know how >> people have solved them. Remembering manual "one-offs" for a system >> configured this way is not acceptable (read: highly prone to >> error/mistake). Is it worth the risk? Most administrators don't have >> the tolerance for stuff like that in the middle of a system upgrade or >> what not; they should be able to follow exactly what's in the handbook, >> to a tee. >> >> There's a link to www.dan.me.uk at the bottom of the above Wiki page >> that outlines "the madness" that's required to configure the setup, all >> of which has to be done by hand. I don't know many administrators who >> are going to tolerate this when deploying numerous machines, especially >> when compounded by the complexities mentioned above. >> > > This basically outlines the reason why I do not use ZFS on root. > > > -- > Dan Langille - http://langille.org/ > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
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