Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261413AbUCEW6G (ORCPT ); Fri, 5 Mar 2004 17:58:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261416AbUCEW6F (ORCPT ); Fri, 5 Mar 2004 17:58:05 -0500 Received: from mtaw6.prodigy.net ([64.164.98.56]:39148 "EHLO mtaw6.prodigy.net") by vger.kernel.org with ESMTP id S261413AbUCEW6B (ORCPT ); Fri, 5 Mar 2004 17:58:01 -0500 Message-ID: <404905E1.70709@matchmail.com> Date: Fri, 05 Mar 2004 14:57:37 -0800 From: Mike Fedyk User-Agent: Mozilla Thunderbird 0.5 (X11/20040209) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Nick Piggin CC: Kyle Wong , linux-kernel@vger.kernel.org Subject: Re: questions about io scheduler References: <088201c40293$5b27ce80$9c02a8c0@southa.com> <40484643.7070104@cyberone.com.au> In-Reply-To: <40484643.7070104@cyberone.com.au> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 704 Lines: 22 Nick Piggin wrote: > > > Kyle Wong wrote: >> 2. Does io scheduler works with md RAID? Correct me if I'm wrong, >> io-schedular <--> md driver <--> harddisks. >> >> > > It goes md driver -> io schedulers -> hard disks. There is an IO scheduler per disk. So MD submits the data to each disk through the IO scheduler. This allows you to have the heads on each disk in the array at different locations, and helps keep response times lower for seeky loads. - 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/