From owner-freebsd-stable@FreeBSD.ORG Wed Jun 17 16:11:13 2009 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 CF8CC1065675 for ; Wed, 17 Jun 2009 16:11:13 +0000 (UTC) (envelope-from dan@dan.emsphone.com) Received: from email1.allantgroup.com (email1.emsphone.com [199.67.51.115]) by mx1.freebsd.org (Postfix) with ESMTP id 8813A8FC41 for ; Wed, 17 Jun 2009 16:11:13 +0000 (UTC) (envelope-from dan@dan.emsphone.com) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by email1.allantgroup.com (8.14.0/8.14.0) with ESMTP id n5HGBCPE017259 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 17 Jun 2009 11:11:12 -0500 (CDT) (envelope-from dan@dan.emsphone.com) Received: from dan.emsphone.com (smmsp@localhost [127.0.0.1]) by dan.emsphone.com (8.14.3/8.14.3) with ESMTP id n5HGBCfB013812 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 17 Jun 2009 11:11:12 -0500 (CDT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.14.3/8.14.3/Submit) id n5HGBAr6013809; Wed, 17 Jun 2009 11:11:10 -0500 (CDT) (envelope-from dan) Date: Wed, 17 Jun 2009 11:11:10 -0500 From: Dan Nelson To: Dan Naumov Message-ID: <20090617161109.GA12966@dan.emsphone.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-OS: FreeBSD 7.2-STABLE User-Agent: Mutt/1.5.19 (2009-01-05) X-Virus-Scanned: ClamAV version 0.94.1, clamav-milter version 0.94.1 on email1.allantgroup.com X-Virus-Status: Clean X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0.2 (email1.allantgroup.com [199.67.51.78]); Wed, 17 Jun 2009 11:11:12 -0500 (CDT) X-Scanned-By: MIMEDefang 2.45 Cc: freebsd-fs@freebsd.org, FreeBSD-STABLE Mailing List Subject: Re: ZFS performance on 7.2-release/amd64 low compared to UFS2 + SoftUpdates X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jun 2009 16:11:14 -0000 In the last episode (Jun 17), Dan Naumov said: > I am wondering if the numbers I am seeing is something expected or is > something broken somewhere. Output of bonnie -s 1024: > > on UFS2 + SoftUpdates: > > -------Sequential Output-------- ---Sequential Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU > 1024 56431 94.5 88407 38.9 77357 53.3 64042 98.6 644511 98.6 23603.8 243.3 The insane sequential input K/sec and random seeks/sec values indicate that your entire test file was cached in memory. Try a larger file (at least 2x your installed RAM). > on ZFS: > > -------Sequential Output-------- ---Sequential Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU > 1024 22591 53.7 45602 35.1 14770 13.2 45007 83.8 94595 28.0 102.2 1.2 > -- Dan Nelson dnelson@allantgroup.com