From owner-freebsd-performance@FreeBSD.ORG Thu May 7 02:05:18 2009 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 E5121106564A for ; Thu, 7 May 2009 02:05:18 +0000 (UTC) (envelope-from pathiaki2@yahoo.com) Received: from web110507.mail.gq1.yahoo.com (web110507.mail.gq1.yahoo.com [67.195.8.112]) by mx1.freebsd.org (Postfix) with SMTP id AE4898FC13 for ; Thu, 7 May 2009 02:05:18 +0000 (UTC) (envelope-from pathiaki2@yahoo.com) Received: (qmail 93550 invoked by uid 60001); 7 May 2009 01:38:38 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1241660318; bh=F366yw2xsX7PS4maDBOvBsRoihEie5FolNG+Af4DFac=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=sg8AQnx8gx+hp20d7WcB4goZyit36GyQKq2g62TVXPI2LfmuJ6pqiPotlOk7jvskA0V6m1XYZzchrMltyA9ZkH0+qMYkyhhmlF30pg3vMBOpOKQvuJkGDIuQU+x8uCfletgjzF6zuT+Zy+jw9+zFsaxn7EgABsM2Xpatc1Vm2f4= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=oq3xTwP6IyRH2sV1HGkNaY4x/18K3WzoiqhEIpGejCRhpwj+KfMuXIUQ+jz1a/fAG8zKHs14A0MLL6Xwrf7pS5yPPVP2XOSvF16fwUJuJqGyYwoywdTPbL0LggOnYSJ6sPObRulJU/vsntrlqtjrARl+MyH204bQJbDBfbLUicc=; Message-ID: <83156.91671.qm@web110507.mail.gq1.yahoo.com> X-YMail-OSG: WdccmvcVM1n45NiLIzsdb0xVIUAIS8abbZ7isDs_ltfMY1MD2GqGBuARjOJTsH6f1G6WYn5GbOXhhtLQTBpS18NgFnOYe0GZPaYPy9LEVXCrVJNc9UEuhfjVIZavVe0z_umjwvdoA8herSz.mNSAguO1On8RO4yxYEjcLec5TN.L5A24Gg1ePu13Aj2daJnRTMQslo9yYtmEMJ6LqRI_ykEmRAF0BZnJz5yTCSiufoGIhkX7kJzCPcjvIOR2w.8hMJ4vKSWgLjMPcAOGeEhxb4LTOAsFb8Mb_VDWj9DVdr1suLWfatExxpmj28y54VZueGak1oTuAHTugO.f5hQ4chxtZHoLbnY- Received: from [173.48.58.54] by web110507.mail.gq1.yahoo.com via HTTP; Wed, 06 May 2009 18:38:37 PDT X-Mailer: YahooMailRC/1277.35 YahooMailWebService/0.7.289.1 References: <1241610888.16418.64.camel@ompc.insign.local> <20090506084834.61600c42.wmoran@potentialtech.com> <4A01C202.8080803@seattlefenix.net> <70C0964126D66F458E688618E1CD008A0793EBD1@WADPEXV0.waddell.com> Date: Wed, 6 May 2009 18:38:37 -0700 (PDT) From: Paul Patterson To: Wojciech Puchar , Gary Gatten In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-performance@freebsd.org, Benjamin Krueger , Olivier Mueller , freebsd-questions@freebsd.org, Bill Moran Subject: Re: filesystem: 12h to delete 32GB of data X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 May 2009 02:05:19 -0000 Sorry. This statement is incorrect. If you aren't using ZFS, or even a GEOM volume with mirror/RAID5/softup/etc, you cannot make the statement that hardware RAID is faster. I learned that 3 years ago. It takes about 30 minutes to mirror 1.5TB on ZFS. Try that on hardware RAID. I did the same with 80 GB SATA drives a couple of years ago. Gmirror killed hardware mirror by 50% When your processor on your hardware RAID card is junk and you have a kickass processor and good chunk of memory on your main system and decent controller that isn't getting maxed, the "hardware RAID is always faster" paradigm walked out the door a few years ago. This does not go for EMC, IBM, Hitachi high-end storage arrays where you write to TBs of RAM Cache. P. ________________________________ From: Wojciech Puchar To: Gary Gatten Cc: freebsd-questions@freebsd.org; Benjamin Krueger ; Olivier Mueller ; freebsd-performance@freebsd.org; Bill Moran Sent: Wednesday, May 6, 2009 2:31:16 PM Subject: RE: filesystem: 12h to delete 32GB of data > It could just be me, but I swear Hardware RAID has been faster for many > many years, especially with RAID5 arrays - or anything that requires maybe with RAID5, but using RAID5 today (huge disk sizes, little sense to save on disk space) instead of RAID1/10 doesn't make much sense, as RAID5 is slow on writes by design _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"