From owner-freebsd-fs@FreeBSD.ORG Wed Feb 16 03:51:46 2005 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 332F816A4CE for ; Wed, 16 Feb 2005 03:51:46 +0000 (GMT) Received: from mail.freebsd.org.cn (dns3.freebsd.org.cn [61.129.66.75]) by mx1.FreeBSD.org (Postfix) with SMTP id 77C2043D1D for ; Wed, 16 Feb 2005 03:51:44 +0000 (GMT) (envelope-from delphij@frontfree.net) Received: (qmail 35040 invoked by uid 0); 16 Feb 2005 03:43:03 -0000 Received: from unknown (HELO beastie.frontfree.net) (219.239.99.7) by mail.freebsd.org.cn with SMTP; 16 Feb 2005 03:43:03 -0000 Received: from localhost (localhost.frontfree.net [127.0.0.1]) by beastie.frontfree.net (Postfix) with ESMTP id AF1CB133689; Wed, 16 Feb 2005 11:51:40 +0800 (CST) Received: from beastie.frontfree.net ([127.0.0.1]) by localhost (beastie.frontfree.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 89659-18; Wed, 16 Feb 2005 11:51:29 +0800 (CST) Received: from localhost.localdomain (unknown [61.135.152.194]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by beastie.frontfree.net (Postfix) with ESMTP id B5BE71335CD; Wed, 16 Feb 2005 11:51:26 +0800 (CST) From: Xin LI To: drhodus@machdep.com In-Reply-To: References: <20050210030119.GD29396@alzatex.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-+/P+cvkImi35BVrjmzcD" Organization: The FreeBSD Simplified Chinese Project Date: Wed, 16 Feb 2005 11:50:10 +0800 Message-Id: <1108525810.676.21.camel@spirit> Mime-Version: 1.0 X-Mailer: Evolution 2.0.3 FreeBSD GNOME Team Port X-Virus-Scanned: by amavisd-new at frontfree.net cc: freebsd-fs@freebsd.org cc: Scott Long Subject: Re: Journalling FS and Soft Updates comparision X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: delphij@delphij.net List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Feb 2005 03:51:46 -0000 --=-+/P+cvkImi35BVrjmzcD Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, David, =E5=9C=A8 2005-02-15=E4=BA=8C=E7=9A=84 22:35 -0500=EF=BC=8CDavid Rhodus=E5= =86=99=E9=81=93=EF=BC=9A > > Softupdates really aren't a whole lot different from journalling. Both >=20 > No, journalling and soft updates are orthogonal technologies; they > do not solve the same problem space, although there is some minor > overlap. Soft updates is not able to solve all the problems which > journaling can. Would you please give some examples? I think a file system journalling is different from what we have seen in applications, e.g. databases, since the primary goal of having a journal is to make the file system recoverable to last checkpoint, is that correct, or maybe I have missed something? Thanks! Cheers, --=20 Xin LI http://www.delphij.net/ --=-+/P+cvkImi35BVrjmzcD Content-Type: application/pgp-signature; name=signature.asc Content-Description: =?UTF-8?Q?=E8=BF=99=E6=98=AF=E4=BF=A1=E4=BB=B6=E7=9A=84=E6=95=B0?= =?UTF-8?Q?=E5=AD=97=E7=AD=BE=E5=90=8D=E9=83=A8?= =?UTF-8?Q?=E5=88=86?= -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQBCEsLy/cVsHxFZiIoRAvUjAJ9zSU6zZr7O/Q1D/s2uPsSsAhfKjwCgigcB UqzWwdE5jUtDSbvCzLh7Nr0= =jv2Y -----END PGP SIGNATURE----- --=-+/P+cvkImi35BVrjmzcD--