From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jason H. Smith" Subject: Re: [linux-lvm] LVM on Raid 5 Performance? References: <92091C60D5E2B74CB77C1FDB84F5FA76F079@s99mail02.okdhs.org> In-Reply-To: <92091C60D5E2B74CB77C1FDB84F5FA76F079@s99mail02.okdhs.org> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200305182148.27901.jason@oes.co.th> Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Mon May 19 01:25:02 2003 List-Id: Content-Type: text/plain; charset="us-ascii" To: linux-lvm@sistina.com I don't know if this answers your question, but maybe search the archives for my posts a few months ago. On 2.4, there's a misfeature when using LVM with RAID5. Basically, the two will cause your system not to cache any data, and to sync to disk immediately, once you create a snapshot volume. Apparently, this will be addressed in 2.6. So if you want RAID5 and LVM, consider hardware acceleration. HTH -- GPG: 03EE 9EB8 E500 874A F509 7B95 9B9A 84A1 26E9 4F79 http://www.ece.utexas.edu/~jhs/public_key.gpg