From owner-freebsd-fs@FreeBSD.ORG Fri Aug 17 15:42:40 2007 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 DB0FA16A419 for ; Fri, 17 Aug 2007 15:42:40 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: from mail.garage.freebsd.pl (arm132.internetdsl.tpnet.pl [83.17.198.132]) by mx1.freebsd.org (Postfix) with ESMTP id 7AC5513C469 for ; Fri, 17 Aug 2007 15:42:40 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id F26D0487F0; Fri, 17 Aug 2007 17:42:37 +0200 (CEST) Received: from localhost (pjd.wheel.pl [10.0.1.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.garage.freebsd.pl (Postfix) with ESMTP id E821145683; Fri, 17 Aug 2007 17:42:32 +0200 (CEST) Date: Fri, 17 Aug 2007 17:41:39 +0200 From: Pawel Jakub Dawidek To: "N. Harrington" Message-ID: <20070817154139.GA1089@garage.freebsd.pl> References: <84373.93412.qm@web34511.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="GvXjxJ+pjyke8COw" Content-Disposition: inline In-Reply-To: <84373.93412.qm@web34511.mail.mud.yahoo.com> User-Agent: Mutt/1.4.2.3i X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on mail.garage.freebsd.pl X-Spam-Level: X-Spam-Status: No, score=-5.9 required=3.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.0.4 Cc: freebsd-fs@freebsd.org Subject: Re: Gjournal reporting 1/2 the speed of non journaled? What is the status of Gjournal? 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: Fri, 17 Aug 2007 15:42:40 -0000 --GvXjxJ+pjyke8COw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 16, 2007 at 06:02:09PM -0700, N. Harrington wrote: > With ZFS, I have not seen much new going on with > gjournal. I am curious what the status of gjournal and > if it will likely be included with 6.3 (whenever that > is due) That was the plan, but I'm not yet sure if I'll find time to do it. > Also, as of late, I have been using it with > 6.2-STABLE via the patches and I seem to be getting > 1/2 the transfer speeds compared to non journaled > disks. It seems like this is recent as previous tests > showed it as quite fast. >=20 > Any suggestions on why this could be happening > greatly appreciated. >=20 > tested via=20 > dd if=3D/dev/zero of=3D./testfile bs=3D16 count=3D16384 Gjournal is ~two times faster than UFS+SU for many small, random and parallel writes (such as running few 'tar x' processes), but is two times slower than UFS+SU for one sequential write stream, as there is no much that can be optimized there. > With disks getting larger and larger, why is it > taking so long for a journaled filesystem to be > standard on BSD? We have ZFS now, we don't need journaled file system:) --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --GvXjxJ+pjyke8COw Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFGxcGzForvXbEpPzQRAnX4AKCBQVAAhqJ5A/FUME2Zw+y++mlbFQCg+Xwf RKFNGrKlhENuO0DIBbMx9rk= =UuH1 -----END PGP SIGNATURE----- --GvXjxJ+pjyke8COw--