From owner-freebsd-current@FreeBSD.ORG Sat Jun 19 07:17:08 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5717D1065670 for ; Sat, 19 Jun 2010 07:17:08 +0000 (UTC) (envelope-from mike@reifenberger.com) Received: from mail-out.m-online.net (mail-out.m-online.net [212.18.0.9]) by mx1.freebsd.org (Postfix) with ESMTP id DA8A98FC08 for ; Sat, 19 Jun 2010 07:17:07 +0000 (UTC) Received: from frontend1.mail.m-online.net (unknown [192.168.8.180]) by mail-out.m-online.net (Postfix) with ESMTP id 2ED3B1C15651; Sat, 19 Jun 2010 09:17:06 +0200 (CEST) Received: from mail.reifenberger.com (ppp-93-104-119-89.dynamic.mnet-online.de [93.104.119.89]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPS id 146431C00194; Sat, 19 Jun 2010 09:17:06 +0200 (CEST) Received: by mail.reifenberger.com (Postfix, from userid 1001) id C3B4E14AA2; Sat, 19 Jun 2010 09:17:05 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.reifenberger.com (Postfix) with ESMTP id B5A0214AA1; Sat, 19 Jun 2010 09:17:05 +0200 (CEST) Date: Sat, 19 Jun 2010 09:17:05 +0200 (CEST) From: Michael Reifenberger To: oizs In-Reply-To: <4C1C0ED9.8090103@freemail.hu> Message-ID: References: <4C1AB4C0.4020604@freemail.hu> <4C1B3792.9000007@freemail.hu> <4C1C0ED9.8090103@freemail.hu> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-current@freebsd.org Subject: Re: Dell Perc 5/i Performance issues X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Jun 2010 07:17:08 -0000 On Sat, 19 Jun 2010, oizs wrote: > Date: Sat, 19 Jun 2010 02:27:05 +0200 > From: oizs > To: freebsd-current@freebsd.org > Subject: Re: Dell Perc 5/i Performance issues > > Im using the Samsung F3 disks, which can do 140MB/s sequentially. I have > tried different raids raid0 will do just as bad as raid5. I even tried one > disk which performed as expected 100MB/s+ reads and writes so I'm not sure > anymore what could be the problem. Maybe the controller hates samsung disks? > I have a 8-disk Samsung F1/F3 mixed setup under FreeBSD-current: (fs)(root) mfiutil show drives mfi0 Physical Drives: ( 932G) ONLINE SATA slot 0 ( 932G) ONLINE SATA slot 1 ( 932G) ONLINE SATA slot 2 ( 932G) ONLINE SATA slot 3 ( 932G) ONLINE SATA slot 4 ( 932G) ONLINE SATA slot 5 ( 932G) ONLINE SATA slot 6 ( 932G) ONLINE SATA slot 7 The disks are organized as JBOD disks. Later on they form one ZFS pool: config: NAME STATE READ WRITE CKSUM x ONLINE 0 0 0 mirror ONLINE 0 0 0 mfid0p4 ONLINE 0 0 0 mfid1p4 ONLINE 0 0 0 mirror ONLINE 0 0 0 mfid2p4 ONLINE 0 0 0 mfid3p4 ONLINE 0 0 0 mirror ONLINE 0 0 0 mfid4p4 ONLINE 0 0 0 mfid5p4 ONLINE 0 0 0 mirror ONLINE 0 0 0 mfid6p4 ONLINE 0 0 0 mfid7p4 ONLINE 0 0 0 ada0p3 ONLINE 0 0 0 (ada0 is there because mfid6 had some unreadable blocks lately) I get ~370MiB/s writing performance using `iozone -s10g -r1m`. While my samsung disks are problematic in the area of reliability (I get occasional parity mismatches or read errors), performance is good. Have you enabled the disk caches as well? Something like: MegaCli -LdSetProp Cached -LALL -a0 MegaCli -LdSetProp NORA -LALL -a0 MegaCli -LdSetProp WB -LALL -a0 MegaCli -LdSetProp -EnDskCache -LALL -a0 (Only if having a USV of course) Dunno if there is a mfiutil equivalent though. Bye/2 --- Michael Reifenberger Michael@Reifenberger.com http://www.Reifenberger.com