From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++) Date: Wed, 28 May 2008 19:57:52 +0100 Message-ID: <20080528195752.0cdcbc6d@core> References: <95711f160805280934y77ed7d91tec5aeb531bf8013c@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <95711f160805280934y77ed7d91tec5aeb531bf8013c@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Jens =?UTF-8?B?QsOkY2ttYW4=?= Cc: Justin Piszcz , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, xfs@oss.sgi.com List-Id: linux-raid.ids On Wed, 28 May 2008 18:34:00 +0200 "Jens B=C3=A4ckman" wrote: > On Wed, May 28, 2008 at 10:53 AM, Justin Piszcz wrote: > > Results: > > > > http://home.comcast.net/~jpiszcz/raid/20080528/raid-levels.html > > http://home.comcast.net/~jpiszcz/raid/20080528/raid-levels.txt >=20 > Either the RAID 1 read speed must be wrong, or something is odd in th= e > Linux implementation. There's six drives that can be used for reading > at the same time, as they contain the very same data. 63MB/s > sequential looks like what you would get from a single drive. Which is fairly typical of a cheap desktop PC where the limitation is t= he memory and PCI bridge as much as the drive. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html