From owner-freebsd-stable@FreeBSD.ORG Tue Aug 10 02:25:21 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1680F1065672 for ; Tue, 10 Aug 2010 02:25:21 +0000 (UTC) (envelope-from aw1@swelter.hanley.stade.co.uk) Received: from v-smtp-auth-relay-5.gradwell.net (v-smtp-auth-relay-5.gradwell.net [79.135.125.99]) by mx1.freebsd.org (Postfix) with ESMTP id 7474D8FC0A for ; Tue, 10 Aug 2010 02:25:20 +0000 (UTC) Received: from 93-97-22-18.zone5.bethere.co.uk ([93.97.22.18] helo=swelter.hanley.stade.co.uk country=GB ident=postmaster&pop3#stade#co^uk) by v-smtp-auth-relay-5.gradwell.net with esmtpa (Gradwell gwh-smtpd 1.290) id 4c60b62f.166c.1e for freebsd-stable@freebsd.org; Tue, 10 Aug 2010 03:15:11 +0100 (envelope-sender ) Received: from swelter.hanley.stade.co.uk (localhost [127.0.0.1]) by swelter.hanley.stade.co.uk (8.14.4/8.14.4) with ESMTP id o7A2FA4K060195 for ; Tue, 10 Aug 2010 03:15:10 +0100 (BST) (envelope-from aw1@swelter.hanley.stade.co.uk) Received: (from aw1@localhost) by swelter.hanley.stade.co.uk (8.14.4/8.14.4/Submit) id o7A2FASC060194 for freebsd-stable@freebsd.org; Tue, 10 Aug 2010 03:15:10 +0100 (BST) (envelope-from aw1) Date: Tue, 10 Aug 2010 03:15:10 +0100 From: Adrian Wontroba To: freebsd-stable@freebsd.org Message-ID: <20100810021510.GA58782@swelter.hanley.stade.co.uk> Mail-Followup-To: Adrian Wontroba , freebsd-stable@freebsd.org References: <20100809161124.GA4618@icarus.home.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100809161124.GA4618@icarus.home.lan> User-Agent: Mutt/1.4.2.3i X-Operating-System: FreeBSD 8.1-PRERELEASE Organization: Oh dear, I've joined one again. X-Virus-Scanned: clamav-milter 0.95.3 at swelter.hanley.stade.co.uk X-Virus-Status: Clean Subject: Re: 8-STABLE Slow Write Speeds on ESXI 4.0 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: aw1@stade.co.uk List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Aug 2010 02:25:21 -0000 On Mon, Aug 09, 2010 at 09:11:24AM -0700, Jeremy Chadwick wrote: > FWIW, Workstation 7.1 is fairly adamant about stating "if you want > faster disk I/O, pre-allocate the disk space rather than let disk use > grow dynamically". I've never tested this however. Anecdotal, as I have no comparative performance figures to hand, but under VMware Server 2 on Windows, performance of non pre-allocated disks is dire and SCSI emulation is better than IDE. -- Adrian Wontroba Anything hit with a big enough hammer will fall apart.