From owner-freebsd-performance@FreeBSD.ORG Thu Oct 23 15:43:11 2008 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A1727106569A for ; Thu, 23 Oct 2008 15:43:11 +0000 (UTC) (envelope-from ssanders@opnet.com) Received: from enterprise58.opnet.com (enterprise58.opnet.com [192.104.65.21]) by mx1.freebsd.org (Postfix) with ESMTP id CA6638FC1B for ; Thu, 23 Oct 2008 15:43:10 +0000 (UTC) (envelope-from ssanders@opnet.com) Received: from [172.16.12.251] (wtn12251.opnet.com [172.16.12.251]) by enterprise58.opnet.com (8.13.6/8.12.10) with ESMTP id m9NEOPvD028464 for ; Thu, 23 Oct 2008 10:24:25 -0400 Message-ID: <490097CC.9010802@opnet.com> Date: Thu, 23 Oct 2008 11:27:08 -0400 From: Stephen Sanders Organization: OpNet User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: freebsd-performance@freebsd.org X-Enigmail-Version: 0.95.7 Content-Type: multipart/mixed; boundary="------------040008060908060606000509" X-OPNET-MailScanner: Found to be clean X-MailScanner-From: ssanders@opnet.com X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Disk Throughput test X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Stephen Sanders List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Oct 2008 15:43:11 -0000 This is a multi-part message in MIME format. --------------040008060908060606000509 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit FreeBSD 6.3 Dual Quad Core Xeon 5450@3Ghz 16GB RAM 3Ware 9650SE-ML / 256MB cache 14 Seagate 750GB/7200RPM/ST375033ONS SATA drives We have an application that is streaming data to disk at the maximum rate the controller can sustain. The controller should be able to develop something on the order of 600MB/s but we're only getting 450MB/s. The application writes about 50GB into a file, closes the file, and then starts another file. I've set all of the recommended settings from 3ware. I have tried various settings for vfs.hirunningspace - various settings include everything from 5MB to the cache size of the card (256MB). Does anyone know if there is some file system performance limit? Thanks --------------040008060908060606000509--