From owner-freebsd-current@FreeBSD.ORG Mon Oct 8 16:18:13 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 0FEC916A4C1 for ; Mon, 8 Oct 2007 16:18:13 +0000 (UTC) (envelope-from ups@freebsd.org) Received: from smtpauth11.prod.mesa1.secureserver.net (smtpauth11.prod.mesa1.secureserver.net [64.202.165.33]) by mx1.freebsd.org (Postfix) with SMTP id B7B5513C467 for ; Mon, 8 Oct 2007 16:18:12 +0000 (UTC) (envelope-from ups@freebsd.org) Received: (qmail 4666 invoked from network); 8 Oct 2007 15:51:32 -0000 Received: from unknown (66.23.216.53) by smtpauth11.prod.mesa1.secureserver.net (64.202.165.33) with ESMTP; 08 Oct 2007 15:51:30 -0000 Message-ID: <470A519A.5030708@freebsd.org> Date: Mon, 08 Oct 2007 11:49:46 -0400 From: Stephan Uphoff User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728) MIME-Version: 1.0 To: Eric Anderson References: <47041B1D.8060900@delphij.net> <47043B71.1@mawer.org> <470445EB.2040401@freebsd.org> In-Reply-To: <470445EB.2040401@freebsd.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org, d@delphij.net, Philip Murray , Antony Mawer 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: Mon, 08 Oct 2007 16:18:13 -0000 Eric Anderson wrote: > 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 > > Unfortunately this is still true. While this is my personal priority and I plan to spend substantial time on bluffs the next months I can't promise that this will actually happen. Stephan Stephan