From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Zhang Subject: Re: RAID-5 streaming read performance Date: Thu, 14 Jul 2005 16:13:44 -0400 Message-ID: <1121372024.5544.104.camel@localhost.localdomain> References: <874qb14btr.fsf@uwo.ca> <1121220487.5552.34.camel@localhost.localdomain> <87mzorfmdx.fsf@uwo.ca> <1121257494.5504.4.camel@localhost.localdomain> <87eka2g9dp.fsf@uwo.ca> <1121259126.5504.14.camel@localhost.localdomain> <87vf3eeqe2.fsf@uwo.ca> <42D5573A.6090801@dgreaves.com> <87r7e23uo5.fsf@uwo.ca> <1121344255.5544.7.camel@localhost.localdomain> <87br55xogl.fsf@uwo.ca> <1121364003.5544.80.camel@localhost.localdomain> <1121364617.5544.83.camel@localhost.localdomain> <877jftxko7.fsf@uwo.ca> Reply-To: mingz@ele.uri.edu Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <877jftxko7.fsf@uwo.ca> Sender: linux-raid-owner@vger.kernel.org To: Dan Christensen Cc: Linux RAID List-Id: linux-raid.ids raid5 can not be that smart. :P ming On Thu, 2005-07-14 at 15:16 -0400, Dan Christensen wrote: > bus/controller. For example, RAID-5 could just do sequential > reads from 3 of the 4 drives, and use the parity chunks it > reads to reconstruct the data chunks from the fourth drive. > If I do parallel reads from 3 of my 4 disks, I can still get > 106MB/s. >