extending a root lvol

[Mark Smith T-Systems]

I am running HP 11.00 and might want to lvextend /opt, doesnt it have to be unmounted first? How can that be done if the system is up and running

[Kenan Erdey]

hi,

why do you want to extend it ?
opt is not mountpoint. just look for what is filling your root volume (core, log files etc.) then remove them.

[James R. Ferguson]

Hi:

If you have OnlineJFS, there is no need to unmount '/opt' before enlarging it. use 'lvextend' to resize the logical volume; then use 'fsadm' to enlarge the filesystem.

If you don't have OnlineJFS, you will need to unmoount '/opt' first and then use 'lvextend and 'extendfs'.

Depending on what you have running, it may be easiest to boot into single user mode (when '/opt' isn't mounted) and increase its size then. Afterwards, it is easiest to reboot to resume normal processing.

Regards!

...JRF...

[Kenan Erdey]

pardon for my previous post. because of the thread subject everyday is posted :)

look for "extending /opt" in the forum.

[Mark Smith T-Systems]

I've done that, it's at 96% and barely growing, and theres not much more I can remove or the DBA's can remove. The IGNITE directory has a couple of very large install files (not logs) but I am unsure if I need those or not.

[Tim Nelson]

If /opt is it's own filesystem ( which it should be) then you have a couple options.

1) create new filesystem and mount point for large applications ( e.g. oracle, should have been its own filesystem anyway, or ignite, or any other non-critial large app install) move the app files there, clear the old directory and mount the new one in its place.

2) extend the fs. If no onlineJFS then you will need to stop all services running from /opt ( good luck ). It is easier to take the system to single-user mode, lvextend and extendfs.

Organization of filesystems is the key to maximum uptime. keep the OS stuff segragated from other applications. /dev/vg00 is for the OS, other vgs and disk are for the rest.

[MarkSyder]

/opt is for installation of software. If you're not planning to install anything it shouldn't grow. If you do need to install something and don't think there is enough space, there is an alternative to extending /opt.

Let us assume you want to install software called yoursoft which needs a directory called /opt/yoursoft. There is nothing to stop you from creating a logical volume with filesystem called /opt/yoursoft. As far as the product is concerned, it will be just the same as being installed in /opt.

Mark Syder (like the drink but spelt different)