From owner-freebsd-current@FreeBSD.ORG Thu Oct 4 01:46:41 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 832A516A419; Thu, 4 Oct 2007 01:46:41 +0000 (UTC) (envelope-from anderson@freebsd.org) Received: from ns.trinitel.com (186.161.36.72.static.reverse.ltdomains.com [72.36.161.186]) by mx1.freebsd.org (Postfix) with ESMTP id 3101713C44B; Thu, 4 Oct 2007 01:46:41 +0000 (UTC) (envelope-from anderson@freebsd.org) Received: from proton.local (r74-193-81-203.pfvlcmta01.grtntx.tl.dh.suddenlink.net [74.193.81.203]) (authenticated bits=0) by ns.trinitel.com (8.14.1/8.14.1) with ESMTP id l941kXIQ030698; Wed, 3 Oct 2007 20:46:33 -0500 (CDT) (envelope-from anderson@freebsd.org) Message-ID: <470445EB.2040401@freebsd.org> Date: Wed, 03 Oct 2007 20:46:19 -0500 From: Eric Anderson User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728) MIME-Version: 1.0 To: Antony Mawer References: <47041B1D.8060900@delphij.net> <47043B71.1@mawer.org> In-Reply-To: <47043B71.1@mawer.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.9 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.1.8 X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on ns.trinitel.com Cc: ups@freebsd.org, freebsd-current@freebsd.org, d@delphij.net, Philip Murray Subject: Re: GJournal X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Oct 2007 01:46:41 -0000 Antony Mawer wrote: > On 4/10/2007 8:43 AM, LI Xin wrote: >> Philip Murray wrote: >>> Hi, >>> >>> I've got a 3TB volume that I really really want to avoid fscks on >>> (they're taking 4-5hours on an exist 1.5TB volume) so Gjournal is >>> looking good. >>> >>> Is it possible to make it only journal meta-data? Instead of data and >>> meta-data (ie, like XFS, ext3 by default etc), it seems like you'd take >>> less of a performance hit due to not having to write all the data twice. >> >> Not now. gjournal now acts as a block-level journal provider which does >> not distinguish between meta-data and file data. > > Has anyone heard any more information on "BLUFFS" - the "BSD Logging > Updated Fast File System" that was mentioned at the May 2007 Developer > Summit? The only information I have been able to find is the PDF slides > from the presentation, which are here: > > http://people.freebsd.org/~ups/pubs/asiabsdcon2007/asiabsdcon_slides_2007.pdf > > > The last slide states the anticipated testing date as Q1, slipped to > Q2... we are now in Q4 and the only thing I can find on BLUFFS is said > PDF above. > > I do hold out hope for a proper journalled FS for FreeBSD, as while ZFS > is brilliant in many regards, it is very memory-heavy and as such not > suitable for all applications... at the same time, UFS is reaching the > stage where larger filesystems take hours or even days to fsck, or > sometimes fail altogether from lack of memory. While gjournal does > provide a partial solution, the penalty from having to write the data > out to disk twice is a limitation... Last I heard from ups@, he was slammed with other things so BLUFFS was temporarily on hold. Eric