From owner-freebsd-geom@FreeBSD.ORG Thu Jun 22 09:49:06 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 0DAD416A67D; Thu, 22 Jun 2006 09:49:06 +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 082CA441AF; Thu, 22 Jun 2006 09:48:35 +0000 (GMT) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id 7583551853; Thu, 22 Jun 2006 11:48:33 +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 A7BEA51849; Thu, 22 Jun 2006 11:48:29 +0200 (CEST) Date: Thu, 22 Jun 2006 11:45:52 +0200 From: Pawel Jakub Dawidek To: freebsd-current@FreeBSD.org, freebsd-fs@FreeBSD.org, freebsd-geom@FreeBSD.org Message-ID: <20060622094552.GC30568@garage.freebsd.pl> References: <20060619131101.GD1130@garage.freebsd.pl> <20060620173339.GA1638@roadrunner.informatik.uni-wuerzburg.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="DIOMP1UsTsWJauNi" Content-Disposition: inline In-Reply-To: <20060620173339.GA1638@roadrunner.informatik.uni-wuerzburg.de> X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 User-Agent: mutt-ng/devel-r804 (FreeBSD) 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: 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: Thu, 22 Jun 2006 09:49:06 -0000 --DIOMP1UsTsWJauNi Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 20, 2006 at 07:33:39PM +0200, Ulrich Spoerlein wrote: +> Pawel Jakub Dawidek wrote: +> > Reading. grep -r on two src/ directories in parallel: +> > UFS: 84s +> > UFS+SU: 138s +> > gjournal(1): 102s +> > gjournal(2): 89s +> >=20 +> > As you can see, even on one disk, untaring eight src.tgz is two times +> > faster than UFS+SU. I've no idea why gjournal is faster in reading. +>=20 +> The UFS+SU score doesn't seem right. Why do SU have a negative impact on +> read performance? Is it solely because of the atime updates? As I said, I've not idea. You may simply ignore my benchmarks and try them on your own:) --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --DIOMP1UsTsWJauNi Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFEmmbQForvXbEpPzQRAjOhAJ9HYmJq9Mnk9C7okc6eR5sxED6o5wCfW+MI /SRcuCebXaP1hRN/30tbW+Q= =ktIy -----END PGP SIGNATURE----- --DIOMP1UsTsWJauNi--