From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Andreas Dilger Message-Id: <200102280537.f1S5bk529025@webber.adilger.net> Subject: Re: [linux-lvm] Possible to raise Max LV? In-Reply-To: <20010227172820.A1211@bar.nowhere> from "zoo1@corecomm.net" at "Feb 27, 2001 05:28:20 pm" Date: Tue, 27 Feb 2001 22:37:46 -0700 (MST) 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: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com "zoo1" writes: > i was also considering creating two VGs, one for "user" data > and one for "system" stuff. now, i'm trying to figure out what i thought > the point of this was, maybe something about possible future migrations > to multispindle systems. One reason to do this (on AIX) at least was that for production systems it was useful to be able to move a VG to another server if the original server died a horrible death. Also, if you have server failover (HA), you need to have all of the data in a single VG in order to import it on the backup server (of course a replicated distributed filesystem is better). Finally, on AIX, you have a backup tool called "mksysb" which would give you a backup tape so that you can install a new/replacement system from the tape, and it configures all of your LVs for you etc. The mksysb backup only backs up the "rootvg", which normally holds /, /usr, /tmp, /var, /home, /boot, and swap (swap and /tmp are not backed up, but are re-created at install time). If you put too much stuff in your rootvg then it was in danger of not fitting on a single tape, and you also may restore a lot of junk you don't want on another system. I've been thinking about doing something like mksysb for Linux, but I need a bit more support in ext2 (to hold the last mounted directory for rebuilding /etc/fstab). Other than that, it would be supremely convenient for bare-metal restores of a system (only need a boot floppy). Cheers, Andreas -- Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto, \ would they cancel out, leaving him still hungry?" http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert