From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Heinz J . Mauelshagen" Subject: Re: [linux-lvm] lvcreate distributed extent option Message-ID: <20021203121104.B25215@sistina.com> References: <615A249B783CD41192F400D0B747AC860898265A@hesse.bbn.hp.com> <3DE8D816.E84D4D82@adelphia.net> Mime-Version: 1.0 In-Reply-To: <3DE8D816.E84D4D82@adelphia.net>; from tkb9@adelphia.net on Sat, Nov 30, 2002 at 10:24:06AM -0500 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: Tue Dec 3 05:19:02 2002 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Sat, Nov 30, 2002 at 10:24:06AM -0500, toby wrote: > "ZECHA,HOLGER (HP-Germany,ex1)" wrote: > > > > Hello, > > > > what do you mean with > > > How about striping with the strip size equal to that of a logical extent? > > > > Can you give an example for the lvcreate command. > > > > The reason to do this is to distribute the disk I/O accross all disks. the > > logical extent 1 is on disk1, logical extent 2 on disk 2 and so on. > > This means during read of logical extent 1, the heade of the second disk can > > already be moved to prepare to read logical extent 2. > > > > This allows us to do more I/O's per second > > > > Holger > > > > > Once you create a striped lv, you cannot extend it by adding more disks. Current > lvm version anyway. That constraint doesn't exits any longer in LVM2/device-mapper using the new LVM2 ondisk metadata format. > > I wanted mine to be more flexible, so I first made a software raid set then made > the pv on top of the raid. That was in Jan this year. Last week I doubled the > size by adding another software raid set. I expanded two of the ext3 formatted > lvs in the process. > > Perhaps not the fastest system in terms of throughput, but quite convenient to > resize. > > > -tkb > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-