From owner-freebsd-fs@FreeBSD.ORG Thu Dec 30 00:27:40 2010 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 D2D38106564A for ; Thu, 30 Dec 2010 00:27:40 +0000 (UTC) (envelope-from dsamms@nw-ds.com) Received: from nw-ds.com (nw-ds.com [66.165.113.38]) by mx1.freebsd.org (Postfix) with ESMTP id A75708FC0A for ; Thu, 30 Dec 2010 00:27:40 +0000 (UTC) Received: from nw-ds.com (localhost [127.0.0.38]) by nw-ds.com (Postfix) with ESMTP id AD9F24BDEFC for ; Wed, 29 Dec 2010 19:11:34 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nw-ds.com; h= content-transfer-encoding:content-type:content-type:subject :subject:mime-version:user-agent:from:from:date:date:message-id :received:received; s=mail; t=1293667893; x=1295482293; bh=kYGRO Zfx37lwsgTe3jZgzcH78yeoRf4WlWEGKI7qSbQ=; b=erI7EiHHwTtCBPy9HM70t xalQb8C/Iob8eZl0fmudC0wuhlAxy1HePc/z4ETLUBLbi50bZaDPX+ZVDoV1yGxU iZ1Yf0UqyqxF1QY8Fl2xr9AqxzvJx3tqk25RkZvV4CJe/b9eFGXl9pnCRorAGCyD ejKZ8t++HAvVVN6I5TOERM= X-Virus-Scanned: amavisd-new at nw-ds.com Received: from nw-ds.com ([127.0.0.38]) by nw-ds.com (nw-ds.com [127.0.0.38]) (amavisd-new, port 10026) with ESMTP id 6jJjntD1URQB for ; Wed, 29 Dec 2010 19:11:33 -0500 (EST) Received: from [192.168.160.70] (host-174-44-170-66.hln-mt.client.bresnan.net [174.44.170.66]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by nw-ds.com (Postfix) with ESMTPSA id 603F44BDEEB for ; Wed, 29 Dec 2010 19:11:33 -0500 (EST) Message-ID: <4D1BCE34.4090601@nw-ds.com> Date: Wed, 29 Dec 2010 17:11:32 -0700 From: David Samms User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.1.16) Gecko/20101228 Thunderbird/3.0.11 MIME-Version: 1.0 To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: 8.2-RC1 and ZFS 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: Thu, 30 Dec 2010 00:27:40 -0000 I gave ZFS a try again this afternoon and immediately came across what I would consider a problem. Simply running dd causes such IO contention that a GUI desktop is unusable and MP3s stop playing. The problem is very repeatable, just run dd if=/dev/zero of=big bs=1m count=6400 System is amd64, source updated Dec 27. Default ZFS parameters. (no tuning). With the same system but UFS+s dd causes no problems. -- David Samms New World Data Systems (614) 619-0000