From owner-freebsd-fs@FreeBSD.ORG Tue Dec 22 03:28:45 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BB77D1065679 for ; Tue, 22 Dec 2009 03:28:45 +0000 (UTC) (envelope-from davidn04@gmail.com) Received: from mail-qy0-f176.google.com (mail-qy0-f176.google.com [209.85.221.176]) by mx1.freebsd.org (Postfix) with ESMTP id 749D28FC13 for ; Tue, 22 Dec 2009 03:28:45 +0000 (UTC) Received: by qyk6 with SMTP id 6so2547099qyk.3 for ; Mon, 21 Dec 2009 19:28:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=UPsOctBFiaz4qafYZiT/Kt8is7HVlOd4aFUCrw69xOA=; b=Ejv6g4B1PVN3xUukYbIGrAJoEiirg1q/SPBPBtOt20s9i69ghVR0WR3kwSYXSrVdjB LXqYkdyrk3Gn8CQIR3MmZSNwQiDNNGfhqxxe9IfM6XigQY5sDMxDnqdWR/GRXMfTE2AG 997UiTiCftxZY+aQTR3MNLtSt9FfJVMAnD+Os= 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=QtXdFxLTZUlvzechwXX2dJPg5sU7HOINlvza9lY9kXmzpvH+dMJtVh6GI7HiwdAFtk e7EgI2IGAzPdnybmHqAez+f1IpIOyr/L0XPJFIwqnFLcAbO4vnhvLdw//G+QUMRWssjz JGF6xeznXAooJ+VZ85ns3U9m5fYMZ5hjrv9HY= MIME-Version: 1.0 Received: by 10.229.43.79 with SMTP id v15mr3741231qce.40.1261452524352; Mon, 21 Dec 2009 19:28:44 -0800 (PST) In-Reply-To: <240049.46806.qm@web113517.mail.gq1.yahoo.com> References: <712903.15604.qm@web113517.mail.gq1.yahoo.com> <3612709F-15CA-4A59-86B1-2674BAA2936D@gmail.com> <240049.46806.qm@web113517.mail.gq1.yahoo.com> Date: Tue, 22 Dec 2009 14:28:44 +1100 Message-ID: <4d7dd86f0912211928y78ce91ect8b86dc1ef4a8d0d1@mail.gmail.com> From: David N To: "Pedro F. Giffuni" Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-fs@freebsd.org Subject: Re: Plans for Logged/Journaled UFS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Dec 2009 03:28:45 -0000 2009/12/22 Pedro F. Giffuni : > ----- Original Message ---- > >> >> On Dec 20, 2009, at 8:37 PM, Pedro F. Giffuni wrote: >> >> > Just wondering... >> > >> > What's wrong with gjournal(8) ? >> > > ... >> >> gjournal(8) journals everything, that is all data and metadata are journaled. >> Which can help with random writes, but essentially cuts linear write throughput >> in half. >> >> Regards, >> Niki Denev > > > I recall ext3fs also journals everything by default and still is very popular. > > I am asking because I've been playing a bit with Aditya's ext2fs (mostly UFS1) > and one of the ideas there is adding gjournal support instead of starting from > scratch. > > Pedro.. > > > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > Hi, Ext3 by default only journals the meta-data http://en.wikipedia.org/wiki/Ext3 >From http://wiki.archlinux.org/index.php/Ext3_Filesystem_Tips "By default, ext3 partitions mount with the 'ordered' data mode. In this mode, all data is written to the main filesystem and its metadata is committed to the journal, whose blocks are logically grouped into transactions to decrease disk I/O" You have to enable full journalling by setting the option in fstab to journal everything. Regards David N