From owner-freebsd-questions@FreeBSD.ORG Fri May 30 08:41:45 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0A11237B401 for ; Fri, 30 May 2003 08:41:45 -0700 (PDT) Received: from bebop.inter-sonic.com (bebop.inter-sonic.com [212.247.185.185]) by mx1.FreeBSD.org (Postfix) with ESMTP id 147DC43F75 for ; Fri, 30 May 2003 08:41:44 -0700 (PDT) (envelope-from peo@intersonic.se) Message-ID: <3ED77BB3.4080900@intersonic.se> Date: Fri, 30 May 2003 17:41:39 +0200 From: "Per olof Ljungmark" Organization: Intersonic AB User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.3.1) Gecko/20030425 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chuck Swiger References: <3ED72156.1070905@intersonic.se> <20030530101845.GG40976@wantadilla.lemis.com> <3ED74FF4.2010905@intersonic.se> <3ED77728.8080009@mac.com> In-Reply-To: <3ED77728.8080009@mac.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=-105.9 required=4.4 tests=AWL,BAYES_10,IN_REP_TO,QUOTED_EMAIL_TEXT,REFERENCES, REPLY_WITH_QUOTES,USER_AGENT_MOZILLA_UA,USER_IN_WHITELIST version=2.55 X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) X-Sanitizer: bebop mail filter cc: freebsd-questions@freebsd.org Subject: Re: Vinum performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: peo@intersonic.se List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 May 2003 15:41:45 -0000 > What ratio of reads to writes do you expect? Had no expectations really, I'm new to Vinum. >> Copying 170 files total 319MB TO the Vinum volume takes about 2m45s. >> Copying same files FROM the Vinum volume to another volume on a >> hardware raid5 controller takes 43s. > > > A 3-1 ratio in speeds for software RAID-5 versus hardware doesn't strike > me as being very wrong.... > >> This machine is not in production yet so I can still make changes to >> the configuration. The current block size is 16384 and the stripe size >> 419k. I assume it would be a good idea to change that to for example >> 491,520? > > > ...or try a few stripe sizes, such as 64K or 128K. > Chuck, Thanks for your comments, I felt it was a good idea just to check before we start to use this piece seriously then I will not be able to touch it for changing configuration. Will try different stripe sizes as per your advice. /per olof