From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752983AbYE1QeV (ORCPT ); Wed, 28 May 2008 12:34:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751749AbYE1QeF (ORCPT ); Wed, 28 May 2008 12:34:05 -0400 Received: from el-out-1112.google.com ([209.85.162.179]:9248 "EHLO el-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751628AbYE1QeD (ORCPT ); Wed, 28 May 2008 12:34:03 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=O6L4Ppjuv8iTzRZnZhccYi+Ft7u1Zang6JpkyTxFPNKyyo/ehsHNTPBttIeIUZgQTv+5kNrbaCGSgsNJFBIgbnFeSZtBEROTjiOUp1kmkHWGvZHGTLpsnDhDcf/Z47FGQnPHEF0wwPk+PC5rw6hYBslqVHaS4Ux8CmXkSHQq3+E= Message-ID: <95711f160805280934y77ed7d91tec5aeb531bf8013c@mail.gmail.com> Date: Wed, 28 May 2008 18:34:00 +0200 From: "=?ISO-8859-1?Q?Jens_B=E4ckman?=" To: "Justin Piszcz" Subject: Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++) Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, xfs@oss.sgi.com In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Either the RAID 1 read speed must be wrong, or something is odd in the 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.