From owner-freebsd-questions@FreeBSD.ORG Mon Jun 2 17:55:34 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5504937B401 for ; Mon, 2 Jun 2003 17:55:34 -0700 (PDT) Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by mx1.FreeBSD.org (Postfix) with ESMTP id 83CB443F93 for ; Mon, 2 Jun 2003 17:55:32 -0700 (PDT) (envelope-from grog@lemis.com) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id A8C9751A6F; Tue, 3 Jun 2003 10:25:28 +0930 (CST) Date: Tue, 3 Jun 2003 10:25:28 +0930 From: Greg 'groggy' Lehey To: Jaye Mathisen Message-ID: <20030603005528.GB6446@wantadilla.lemis.com> References: <3ED72156.1070905@intersonic.se> <20030530101845.GG40976@wantadilla.lemis.com> <20030603004823.GA78992@backmaster.cdsnet.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="7ZAtKRhVyVSsbBD2" Content-Disposition: inline In-Reply-To: <20030603004823.GA78992@backmaster.cdsnet.net> User-Agent: Mutt/1.4i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 cc: freebsd-questions@freebsd.org Subject: Re: Vinum performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Jun 2003 00:55:34 -0000 --7ZAtKRhVyVSsbBD2 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Monday, 2 June 2003 at 17:48:23 -0700, Jaye Mathisen wrote: > On Fri, May 30, 2003 at 07:48:45PM +0930, Greg 'groggy' Lehey wrote: >> On Friday, 30 May 2003 at 11:16:06 +0200, Per olof Ljungmark wrote: >>> Using Vinum on 4.7-RELEASE-p10, I wonder what can be done to optimize >>> performance. So far I am not impressed but perhaps I did not configure >>> Vinum optimal, grateful for any hints thanks. >> >> You haven't said what your problem is. It definitely depends on your >> application (which may simply be the way you measure it). >> >> FWIW, the stripe size should be a multiple of the file system block >> size. Yes, the man pages don't necessarily say that, but it's also >> not so important. > > Hmmm, I thought the consensus was to use a weird stripe size to avoid > getting all the inode/superblock stuff on 1 disk. Correct, for some definition of "weird". > I seem to recall somebody saying somethingabout using stripe sizes > like 273k and such... Yes, I once said that. Then it occurred to me that many transfers are complete file system blocks. If you have a stripe size which isn't a multiple of the block size, you'll end up with more transfers split across two devices, which has a negative effect on performance. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers --7ZAtKRhVyVSsbBD2 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQE+2/IAIubykFB6QiMRAs5/AKCZyKi6qFc6EciL9PeacELgan8b4wCfeiR0 WuRnurw8UiYCempJ0EiO7Ag= =QGYq -----END PGP SIGNATURE----- --7ZAtKRhVyVSsbBD2--