From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: LVM on raid10,f2 performance issues Date: Wed, 3 Dec 2008 08:15:04 +0100 Message-ID: <20081203071504.GA8161@rap.rap.dk> References: <49332920.5010503@gmail.com> <20081201164244.GB23899@rap.rap.dk> <4935C4B3.2060404@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <4935C4B3.2060404@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Holger Mauermann Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, Dec 03, 2008 at 12:28:51AM +0100, Holger Mauermann wrote: > Keld J=F8rn Simonsen schrieb: > > How is it if you use the raid10,f2 without lvm? > > What are the numbers? >=20 > After a fresh installation LVM performance is now somewhat better. I > don't know what was wrong before. However, it is still not as fast as > the raid10... >=20 > dd on raw devices > ----------------- >=20 > raid10,f2: > read : 409 MB/s > write: 212 MB/s >=20 > raid10,f2 + lvm: > read : 249 MB/s > write: 158 MB/s What is the performance with raid0? What is the performance with a filesystem? Did you try=20 blockdev --setra 65536 /dev/md3 How many disks are you using? best regards keld -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html