[TriLUG] LVM2 on a new gentoo system
jonc at nc.rr.com
Sun Mar 14 12:55:15 EST 2004
On Sun, 2004-03-14 at 11:53, Peter Long wrote:
> Hi all,
> I am getting ready to try out a fresh install of gentoo. I want to use
> LVM2. I have been reading through the LVM Howto for the last 45 minutes
> and I am still a little confused. Can I setup my disks using LVM2 at
> install time? Also, can the /boot filesytem be on LVM, or do I have to
> set it up as a regular partition? I have one 30GB drive in this system
> on /dev/hde. I suspect I will have to configure it as follows. If anyone
> has a better suggestion please let me know.
> /dev/hde1 /boot ~32M
> /dev/hde2 swap 1GB *
> /dev/hde3 a LVM volume group, split into /,/home and maybe /var
> * (I have 1GB of RAM, do I really need 2GB of swap?)
> Is it possible to install /boot on a logical volume? I guess putting
> swap on a LV does not make any sense (assuming it is possible).
> This machine will be my linux play machine. I will be messing with it a
> lot. It will not be expected to be VERY secure since it will be behind
> my firewall/mail server machine. (Although I may want it to serve as a
> backup firewall machine. Not sure yet.)
> Peter Long
I haven't played with Gentoo much, but with other distributions you can
setup LVM during the install and even put /boot in the LVM.
My personal opinion is that it is a very bad idea to make /boot anything
but EXT2 (or EXT3 if it is supported natively in your kernel). On
systems where I'm using LVM, I generally setup /boot as its own
partition (150Mb to 200Mb, which is way overkill), and then the rest of
the drive gets setup as part of the LVM.
I have several production (client) machines setup this way, and the disk
I/O is really good on all partitions - better than running straight EXT2
partitions directly off the drives. Of course the drives are all SCSI
on these production boxes.
I would guess that using the LVM for a /var ext2 partition (on a web
proxy or mail server) gives me an added 10% to 20% speed boost for disk
I/O. Anyone have any hard stats on their installs?
Good Luck - Jon Carnes.
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