From owner-freebsd-current@FreeBSD.ORG Wed Oct 3 22:36:43 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 6A26D16A41A for ; Wed, 3 Oct 2007 22:36:43 +0000 (UTC) (envelope-from pmurray@nevada.net.nz) Received: from bellagio.open2view.net (bellagio.open2view.net [210.48.79.75]) by mx1.freebsd.org (Postfix) with ESMTP id 1F4E813C448 for ; Wed, 3 Oct 2007 22:36:43 +0000 (UTC) (envelope-from pmurray@nevada.net.nz) Received: from [10.58.3.94] (ip-58-28-153-91.ubs-dsl.xnet.co.nz [58.28.153.91]) by bellagio.open2view.net (Postfix) with ESMTP id 25CD36ABBFF for ; Thu, 4 Oct 2007 11:17:03 +1300 (NZDT) Mime-Version: 1.0 (Apple Message framework v752.3) To: freebsd-current@freebsd.org Message-Id: From: Philip Murray Date: Thu, 4 Oct 2007 11:16:56 +1300 X-Mailer: Apple Mail (2.752.3) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: 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: Wed, 03 Oct 2007 22:36:43 -0000 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. But I understand in this case after a crash you could end up with empty files? (Due to the metadata being consistent but the data not? I've seen this happen with XFS before...) (I have tried ZFS, but just had two kmem too small panics after 5 minutes... this is on an amd64 machine with 8GB of RAM) Cheers Phil