From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Robinson Subject: Re: Linux RAID & XFS Question - Multiple levels of concurrency = faster I/O on md/RAID 5? Date: Sat, 01 Nov 2008 10:55:27 +0000 Message-ID: <490C359F.7080504@anonymous.org.uk> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com To: Justin Piszcz Cc: linux-raid@vger.kernel.org, xfs@oss.sgi.com List-Id: linux-raid.ids On 01/11/2008 08:29, Justin Piszcz wrote: [...] > Why is running 3 jobs con-currently that take care of two parts each > more than > twice as fast than running one job for six parts? Because you have multiple CPUs? Cheers, John.