From owner-freebsd-fs@FreeBSD.ORG Sun Jun 28 11:37:15 2009 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 0AC7F1065676 for ; Sun, 28 Jun 2009 11:37:15 +0000 (UTC) (envelope-from andrew@modulus.org) Received: from email.octopus.com.au (email.octopus.com.au [122.100.2.232]) by mx1.freebsd.org (Postfix) with ESMTP id 5BF838FC2E for ; Sun, 28 Jun 2009 11:37:14 +0000 (UTC) (envelope-from andrew@modulus.org) Received: by email.octopus.com.au (Postfix, from userid 1002) id EE167172FB; Sun, 28 Jun 2009 21:37:37 +1000 (EST) X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on email.octopus.com.au X-Spam-Level: X-Spam-Status: No, score=-0.3 required=10.0 tests=ALL_TRUSTED,DNS_FROM_DOB, RCVD_IN_DOB autolearn=no version=3.2.3 Received: from [10.20.30.102] (60.218.233.220.static.exetel.com.au [220.233.218.60]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: admin@email.octopus.com.au) by email.octopus.com.au (Postfix) with ESMTP id AD78817255; Sun, 28 Jun 2009 21:37:33 +1000 (EST) Message-ID: <4A475511.5000700@modulus.org> Date: Sun, 28 Jun 2009 21:33:37 +1000 From: Andrew Snow User-Agent: Thunderbird 2.0.0.6 (X11/20070926) MIME-Version: 1.0 To: Dan Naumov References: <4A4725FA.80505@modulus.org> <4A4747A0.6040902@modulus.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org, freebsd-geom@freebsd.org Subject: Re: read/write benchmarking: UFS2 vs ZFS vs EXT3 vs ZFS RAIDZ vs Linux MDRAID 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: Sun, 28 Jun 2009 11:37:15 -0000 OK, I thought we were taling about a single-threaded sequential write which was what my benchmark is. It sounds like the graphs you published were of a multi-threaded writers - how many processes were running in parallel in the case of the "Contiguous Write Performance" here? http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-contig-write.png - Andrew