On Tue, 2004-07-13 at 02:12, Craig Ringer wrote:
> On Tue, 2004-07-13 at 00:37, Krsnendu dasa wrote:
> > Any recommendations how to partition the hard drive?
>
> A small-ish root FS, then a gigantic LVM PV for the rest. That gives you
> the flexibility to reallocate storage as and when you need it. Running
> out of space on /var? Add 10 gigs to the mounted, active partition on
> the running server.
> I like to use LVM and keep separate:
> /
> /home
> /var
> /usr
> /usr/local
> /opt
>
> because there's little wasted storage. I allocate relatively minimal
> amounts of space to each initially, then expand them as needed. You
> could probably safely lose the /opt and /usr/local ;-) though.
I'll second this suggestion. I usually allocate 75MB for a boot
partition (/boot) and put everything else (including /) into the LVM.
> You'll also never understand how you lived without LVM snapshots. They
> makes things like mail spool backups so much easier (and less
> disruptive) that it's incredible.
Hear, hear! With LVM, /home is unavailable for perhaps 20 seconds each
night. My backup script looks something like this:
umount /home
lvcreate --snapshot \
--size 200M \
--name Daily-`date +%j` \
/dev/vg00/lv_home
mkdir /backups/`Daily-`date +%j`
mount /home
mount /dev/vg00/Daily-`date +%j` /backups/`Daily-`date +%j`
tar -czf /dev/tape /backups/Daily-`date +%j`
umount /backups/*
lvremove /dev/vg00/Daily-`date +%j`
In the real version, I just run `date +%j` once; I've written it out
longhand for clarity. `date +%j` gives you a Julian date, so you get
backups named Daily-187 on the 187th day of the year.
You can do the same thing with Postgres databases if you add "service
postgres stop" and "service postgres start" to the beginning and end of
this script.
There are patches that will allow you to do this without umounting home,
but I have gotten better results doing it this way.
--
David Johnston <[EMAIL PROTECTED]>
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