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Allan Gottlieb wrote: |
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> I need to add space to /var (thank you, libreoffice), which is on lvm. |
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> Since my one volume group vg is getting low, I thought this would be a |
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> good time to extend it as well. |
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> |
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> Alan (McKinnon) has posted very helpful lvm bits (reprinted below). |
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> Following alan's bottom up creation mandate I believe the idea is |
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> |
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> phy disk: /dev/sda my only drive |
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> phy part: fdisk create another partition of type LVM (/dev/sda8) |
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> phy vol: pvcreate /dev/sda8 |
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> vol grp: vgextend vg /dev/sda8 |
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> log vol: lvextend --size +10G /dev/vg/var |
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> file sys: resize2fs /dev/vg/var |
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> files/dirs: not relevant |
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> |
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> Questions |
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> |
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> 1. Apparently 2.6 (hence 3.x) kernels can expand mounted file systems |
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> (/var is mounted as ext3). |
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> |
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> Since I can't unmount /var because it is in use, I guess that, if I |
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> every need to shrink /var, I would need to boot off a CD. Is that |
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> correct? |
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> |
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> Back in the day, we had single user mode for this, but I don't see |
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> how to get the equivalent now. |
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> |
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> Is it really safe to extend /var (i.e., /dev/vg/var) while mounted |
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> as ext3? It sounds frightening since daemons could start running |
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> and access /var. |
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> |
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> 2. Since currently /var is entirely from /dev/sda7 (my original lvm |
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> partition) should I use the optional parameter to lvextend to |
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> force the new space for /var to come from there as well? |
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> lv extend --size +10G /dev/sda7 |
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> |
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> thanks in advance |
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> allan |
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When I need to do something like this, I do a: |
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rc single |
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That stops all the services, including loggers which need /var, and on |
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my systems, umounts /var as well. I'm assuming you have upgraded to |
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baselayout2 and openrc. That may not work on the old setups. When you |
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go to single user mode, it umounts everything except / itself. May want |
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to recall that if you have notes in your user directory which would not |
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be mounted. I always put things like that in /root. |
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As for being safe, I did one of my file systems recently while |
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downloading a movie. It was being actively written to while it was |
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being expanded. The movie played fine when it was all done so I guess |
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it is safe if the file system can be expanded while mounted. Keep in |
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mind, some can't so check first. |
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I'd have to read on the rest as I am a bit new to this too. Maybe |
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someone who knows more will comment on the rest. |
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Dale |
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:-) :-) |
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-- |
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I am only responsible for what I said ... Not for what you understood or how you interpreted my words! |
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Miss the compile output? Hint: |
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EMERGE_DEFAULT_OPTS="--quiet-build=n" |
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