Increase root space

[Javier Ortiz Guajardo]

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

How can i do it?

than

[Chris Watkins_1]

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.

[A. Clay Stephenson]

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.

[RNY]

Hello,

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

Regards

[DGH_2]

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

[Steven E. Protter]

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

[Stefan Farrelly]

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).

[doug mielke]

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.

[doug mielke]

..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.

[Pratyush Paul_1]

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