From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: RAID performance Date: Thu, 07 Feb 2013 02:24:24 -0600 Message-ID: <511364B8.5040900@hardwarefreak.com> References: <51134E43.7090508@websitemanagers.com.au> <51134F0F.607@websitemanagers.com.au> Reply-To: stan@hardwarefreak.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <51134F0F.607@websitemanagers.com.au> Sender: linux-raid-owner@vger.kernel.org To: Adam Goryachev Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 2/7/2013 12:51 AM, Adam Goryachev wrote: > Sorry, graphs can be seen at: > > http://203.98.89.64/graphs/ The graphs tell us nothing in isolation Adam. What is needed is to know what workloads are running when the device queues and response times start piling up. Whether rust or SSD, queues will increase, as well as IO completion times, when sufficient IO is being performed. -- Stan