From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: Understanding bonnie++ results Date: Sat, 1 Mar 2008 03:05:12 +0100 Message-ID: <20080301020512.GA6657@rap.rap.dk> References: <1204191989.16924.10.camel@franck-gusty> <20080228190609.GA29262@rap.rap.dk> <1204273482.9381.66.camel@franck-gusty> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1204273482.9381.66.camel@franck-gusty> Sender: linux-raid-owner@vger.kernel.org To: Franck Routier Cc: linux-raid List-Id: linux-raid.ids On Fri, Feb 29, 2008 at 09:24:42AM +0100, Franck Routier wrote: > By the way, my server in not really in a production state, and the > hardware is running, so I might take some time to do sensible tests if > anyone has ideas of what a good test would be... I would like you to investigate why random writes are so relatively slow with raid10,f2. You could run the bonnie+ tests, and then watch via an iostat how each of the disks are performing, compared to a HW RAID10. And also see if it matters if the resync has completed or not. Best regards keld > > > I like to get such results of comparison between HW and SW raid. > > How advanced are Adaptec controllers considered these days? > > My thoughts are that SW raid is faster than HW raid, because Neil and the > > other people here together can develop more sophisticated algorithms, > > but I would like some hard figures to back up that thought. > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html