From owner-freebsd-stable@FreeBSD.ORG Tue Jan 4 16:50:23 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 050771065695 for ; Tue, 4 Jan 2011 16:50:23 +0000 (UTC) (envelope-from fvhemert@gmail.com) Received: from mail-gy0-f182.google.com (mail-gy0-f182.google.com [209.85.160.182]) by mx1.freebsd.org (Postfix) with ESMTP id 723008FC16 for ; Tue, 4 Jan 2011 16:50:22 +0000 (UTC) Received: by gyf3 with SMTP id 3so6063873gyf.13 for ; Tue, 04 Jan 2011 08:50:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=6WFLVR7OJbvZOx+0JwkripuYQJ/BbH2dZUZbp7BE8Qk=; b=Aj47aM/E7+Pk9prNRoGwa6VVEPs9bjGok/RpefSgSd/rghDCUQfO7gbnNV+1Uaj6/c htaBHfFf8571F/2Um85dvC6w2orNpLLsd9R3wws+xdiTnP1gAkNFJOHvMNDCz3J4ZUZG U/Rv/en/uHO5N2D2G6nbeMOniWZZ/rQ8sD3KI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=EXxbDcucwnmxJIIe1PfkrOzucK6oLeQ3IuYJxIVnlOG6vm8vAvZHVtEuDwQjN1zGD4 vATC5zf3+PTyRLXAO2j15JYxe0g/yjBZiFH8A7A/1c8dOzNZhQOd59nQYNCuL3SDGaWa y1GMWqciYyo3voYFJ12XdaoaEvVxpo0/hFb3k= MIME-Version: 1.0 Received: by 10.100.254.20 with SMTP id b20mr5737413ani.167.1294159821462; Tue, 04 Jan 2011 08:50:21 -0800 (PST) Received: by 10.101.5.31 with HTTP; Tue, 4 Jan 2011 08:50:21 -0800 (PST) In-Reply-To: <4D20629D.2030803@langille.org> References: <4D1AF388.3080107@infracaninophile.co.uk> <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> Date: Tue, 4 Jan 2011 17:50:21 +0100 Message-ID: From: Freek van Hemert To: Dan Langille Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org, Peter Jeremy , Jeremy Chadwick Subject: Re: slow ZFS on FreeBSD 8.1 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: Tue, 04 Jan 2011 16:50:23 -0000 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 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" >