From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andras Korn Subject: Re: write-behind has no measurable effect? Date: Wed, 16 Feb 2011 13:00:56 +0100 Message-ID: <20110216120056.GD13135@hellgate.intra.guy> References: <20110214213817.GG836@hellgate.intra.guy> <20110215095042.51ef7e0a@notabene.brown> <20110214225754.GK19990@hellgate.intra.guy> <20110215104109.06b12b33@notabene.brown> <20110215010052.GA13135@hellgate.intra.guy> <4D59D4A5.9050106@anonymous.org.uk> <20110215021900.GB13135@hellgate.intra.guy> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Tue, Feb 15, 2011 at 06:10:17AM -0300, Roberto Spadim wrote: > andras could you make some benchmarks to raid1 with round robin read balance? > at this site: > www.spadim.com.br/raid1/ For the record: we did some benchmarks and while the patch shows promise and seems to cause no problems, it resulted in no measurable performance increase for a RAID1 array composed of an SSD and two 7200rpm HDDs. Andras -- Andras Korn If it ain't broken, play with it until it is.