From owner-freebsd-geom@FreeBSD.ORG Tue Jun 20 20:07:26 2006 Return-Path: X-Original-To: freebsd-geom@FreeBSD.org Delivered-To: freebsd-geom@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0D12016A47B for ; Tue, 20 Jun 2006 20:07:26 +0000 (UTC) (envelope-from mikej@rogers.com) Received: from smtp104.rog.mail.re2.yahoo.com (smtp104.rog.mail.re2.yahoo.com [206.190.36.82]) by mx1.FreeBSD.org (Postfix) with SMTP id 4A8EF43D45 for ; Tue, 20 Jun 2006 20:07:24 +0000 (GMT) (envelope-from mikej@rogers.com) Received: (qmail 66799 invoked from network); 20 Jun 2006 20:07:23 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=rogers.com; h=Received:Message-ID:Date:From:User-Agent:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=2GQun7jY0/SnK0/NVjCsnWRW1e7wa5mJhxbiTt6O12797Lr1G00QUpk88YcZFVrURHTxfNxjuSqnFPCk6dqZACM5ko3qMrO88CEGeoYEYS/xINcBON96ZMCS7ojhBF/uJ8gZhlEsxeO1NEurszUYn39qaXGIh9IBOPt44nZFmhE= ; Received: from unknown (HELO ?70.31.50.218?) (mikej@rogers.com@70.31.50.218 with plain) by smtp104.rog.mail.re2.yahoo.com with SMTP; 20 Jun 2006 20:07:23 -0000 Message-ID: <44985586.2090504@rogers.com> Date: Tue, 20 Jun 2006 16:07:34 -0400 From: Mike Jakubik User-Agent: Thunderbird 1.5.0.4 (Windows/20060516) MIME-Version: 1.0 To: Xin LI References: <20060619131101.GD1130@garage.freebsd.pl> <44984A91.8040805@rogers.com> <20060620193630.GA8007@garage.freebsd.pl> <1150833586.24301.1.camel@spirit> In-Reply-To: <1150833586.24301.1.camel@spirit> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Cc: freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org, Pawel Jakub Dawidek , freebsd-geom@FreeBSD.org Subject: Re: Journaling UFS with gjournal. X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Jun 2006 20:07:26 -0000 Xin LI wrote: > 在 2006-06-20二的 21:36 +0200,Pawel Jakub Dawidek写道: > >> The performance impact is big for large files, because in theory we have >> to write the data twice. >> Yes, it eliminates need for SU, but there are reasons, that you still >> want to use SU, eg. for snapshots. >> > > Em... IIRC SU and snapshots are independent, no? > > Cheers, > What about mounting the filesystem async though? It was my understanding that the Linux filesystems were much faster in benchmarks because they were mounted async by default, however the presence of journaling allowed this safely. Is this the case here too?