From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bradley M Alexander Subject: Re: [linux-lvm] LVM performance Message-ID: <20011123002611.N5393@sonsofthunder.yi.org> References: <20011122231706.M5393@sonsofthunder.yi.org> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: 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: Thu Nov 22 23:24:02 2001 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Fri, Nov 23, 2001 at 05:32:07PM +1300, Steve Wray wrote: > > thats dead right; ide can't simultaneously write to the master and slave > on the same controller. Also, the pair of drives uses the controller > circuitry > of the master, so it always pays to make the master the most modern one. Since both controllers have a drive master and a cd slave, this shouldn't matter, per se. > > > Can anyone give me any ideas as to why the machine gets beaten about so > > much during IO operations and more importantly how can I minimize the > > impact. > > Dunno, if it was because the fs is striped across those drives then > splitting them across controllers would have made it go away. Nothing should be striped across the drives. I have two PVs and made two VGs, one on each drive. The way it works out, the data I am mastering is on vg01 (hdc), and the ISO is being created there as well. the CD write actually happens from hdc -> hdd. > I've seen no performance problems at all and really thrashed an LVM-root > machine for test purposes while working on a movie. It took it well, > performance-wise. (reliability is another issue; never go LVM-root... > but thats just my 2 cents, YMMV). Yeah, I wasn't brave enough to go all out...And with the problems I was having, I'm glad I made that decision. :) > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html -- --Brad ============================================================================ Bradley M. Alexander, CISSP | Co-Chairman, Beowulf System Admin/Security Specialist | NoVALUG/DCLUG Security SIG Debian/GNU Linux Developer | storm@debian.org | storm@tux.org ============================================================================ You start with a bag full of luck and an empty bag of experience. The trick is to fill the bag of experience before you empty the bag of luck. --Rules of the Air, #16