On Wednesday 2008 December 17 23:30:04 M.Lewis wrote: > Boyd Stephen Smith Jr. wrote: > > On Wednesday 2008 December 17 23:00:41 M.Lewis wrote: > >> Given a Lenny LVM setup as follows: > >> > >> rattler:~# lvs > >> LV VG Attr LSize Origin Snap% Move Log > >> Copy% Convert > >> home rattler -wi-ao 65.02G > >> root rattler -wi-ao 6.68G > >> swap_1 rattler -wi-ao 2.59G > >> > >> Is it possible to reorganize the current LVM to separate out say /var & > >> /tmp into their on LV? > > > > Any free space on the VG? Or, can you make some by shrinking one of the > > filesystems and then shrinking it's associated VG? > > No, free space is all used in LVs. Yes, I can shrink /home easily by > 10-20GB.
Then, I'd:
--- Prep ---
1. Go down to or boot into single-user mode.
2. Unmount /home
3. Size down /home and then rattler/home
4. Optional: make sure the /home filesystem is still fine -- at this point
reverting the lv shrinking is fairly easy.
---
5. Make new lvs for /var and /tmp. (BTW, if you have 1G or more, you might
just put /tmp on tmpfs.)
6. Make the new filesystems for /var and /tmp.
7. If possible, remount / read-only. If writing isbeing done to files in the
old /var or /tmp during or after the rsync, you'll lose some of that data
8. Mount the new /var and /tmp in the right place.
--- Data Migration ---
9. Mount with -o bind / on /mnt.
10. Rsync /mnt/var/. to /var and /mnt/tmp/. to /tmp.
11. rm -rf /mnt/{var,tmp}/{.[!.],}*
12. Umount /mnt.
--- Finishing touches --
13. Add new /var and /tmp to /etc/fstab.
14. Reboot normally or simply walk the system up to your normal multi-user run
level.
Relevant manpages:
1. init
2. umount
3. filesystem-specific e.g. resize_reiserfs; lvreduce
4. fsck; If you need to undo the lvreduce, vgcfgrestore
5. lvcreate
6. mkfs
7. mount (options: remount,ro)
8. mount
9. mount (options: bind)
10. rsync
11. rm
12. umount
13. fstab
14. init
Write back if you need more details.
--
Boyd Stephen Smith Jr. ,= ,-_-. =.
b...@iguanasuicide.net ((_/)o o(\_))
ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-'
http://iguanasuicide.net/ \_/
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