Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030254AbWJRMnm (ORCPT ); Wed, 18 Oct 2006 08:43:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030257AbWJRMnm (ORCPT ); Wed, 18 Oct 2006 08:43:42 -0400 Received: from brick.kernel.dk ([62.242.22.158]:1868 "EHLO kernel.dk") by vger.kernel.org with ESMTP id S1030254AbWJRMnl (ORCPT ); Wed, 18 Oct 2006 08:43:41 -0400 Date: Wed, 18 Oct 2006 14:44:20 +0200 From: Jens Axboe To: Alan Cox Cc: Jakob Oestergaard , Arjan van de Ven , "Phetteplace, Thad (GE Healthcare, consultant)" , linux-kernel@vger.kernel.org Subject: Re: Bandwidth Allocations under CFQ I/O Scheduler Message-ID: <20061018124420.GI24452@kernel.dk> References: <1161048269.3245.26.camel@laptopd505.fenrus.org> <20061017132312.GD7854@kernel.dk> <20061018080030.GU23492@unthought.net> <1161164456.3128.81.camel@laptopd505.fenrus.org> <20061018113001.GV23492@unthought.net> <20061018114913.GG24452@kernel.dk> <20061018122323.GW23492@unthought.net> <1161175344.9363.30.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1161175344.9363.30.camel@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 561 Lines: 16 On Wed, Oct 18 2006, Alan Cox wrote: > Bandwidth is completely silly in this context, iops/sec is merely > hopeless 8) Both need the disk to play nicely, if you get into error handling or correction, you get screwed. Bandwidth by itself is meaningless, you need latency as well to make sense of it. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/