topic Re: Increase root space in Operating System - HP-UX

Increase root space

Javier Ortiz Guajardo — Thu, 20 Nov 2003 18:23:25 GMT

I want to increase the size of filesystem root (/). I donÂ´t have JFS installed to increase it online.

How can i do it?

than

Re: Increase root space

Chris Watkins_1 — Thu, 20 Nov 2003 18:30:20 GMT

Make an Ignite image of vg00 to tape.
Restore from the Ignite, and change the filesystem size
on the way back up. It's the quickest and easiest way I know.

Re: Increase root space

A. Clay Stephenson — Thu, 20 Nov 2003 18:31:39 GMT

It wouldn't matter if you had OnlineJFS. / , /stand, and the primary swapspace must be allocated as contigious blocks. The only real answer to your question is to do a make_tape_recovery and Ignite the system and resize the LVOL at that time.

It's very rare that / ever needs to be increased in size (unless you need to upgrade the OS). In all cases a size of 160MB-200MB is more than enough. If your / filesystem is running out of space something is wrong because once a system has been setup the size of / should be all but static.

Re: Increase root space

RNY — Fri, 21 Nov 2003 11:27:18 GMT

Hello,

You must reduce the size of the swap to be able to extend the root logical volume.

Regards

Re: Increase root space

DGH_2 — Fri, 21 Nov 2003 11:35:17 GMT

Hi
you can do it by reducing the swap.
i preffer that you do it by using ignite.
this is better and you can increase the / and other lvols if you have to, and for sure if you have free space.

Regards:
DGH

Re: Increase root space

Steven E. Protter — Fri, 21 Nov 2003 11:35:41 GMT

Make sure ignite is current:

/opt/ignite/bin/make_tape_recovery -Av -x inc_entire=vg00

Boot the box
interupt at the 10 second prompt

sea

Boot off the sequential device.

example

bo p2

Watch closeley at the console, when there is a prompt to press a key for interactive restore, do it.

Now you can increase the size of the root fs.

I do not believe the standard size of root in the os install is adequate. Thats why so many people have to do this.

SEP

Re: Increase root space

Stefan Farrelly — Fri, 21 Nov 2003 11:51:27 GMT

If you dont want to use ignite to rebuild your server from tape you can it relatively easy using this method;

1. / is lvol3. lvol4 (tmp) is next so move tmp first. Create a new lvol (usually lvol9), edit /etc/fstab, make /tmp on lvol9, comment out lvol4. Reboot

2. now you can lvremove lvol4 to free up space immediately after lvol3 (/) as this is where you need contiguous space to extend root.

3. boot in lvm maintenance mode. Activate vg00, lvextend lvol3, extendfs it, reboot.
Done.

This only allows you to extend root/lvol3 by as much as the size of lvol4 (tmp).

Re: Increase root space

doug mielke — Fri, 21 Nov 2003 12:02:52 GMT

A short term workaround could be to create some sym. links (ln -s) from large directories under / to other, more roomy filesystems. Not a great long term stratagy, but can be helpful in an emergency.

Re: Increase root space

doug mielke — Fri, 21 Nov 2003 12:15:35 GMT

..and I should be more complete in my answer.

Move large files / directories to a roomy filesystem, and ln -s them to /old_dir_name.

Re: Increase root space

Pratyush Paul_1 — Sat, 22 Nov 2003 08:17:27 GMT

Hi -

This is what I did in my data center.

#make_recovery -i ( take a complete backup of the vg00, with interactive option).

After the back up is done, boot thru the tape and interact with the filesystem sizes. modify the sizes and then proceed. It would be done in 30 minutes. If possible try to get 2 sets of tape backup( in case the first one fails).

Thanks

Pratyush