[guava]

Assuming this is 64bit Power 5 AIX 5.3 ML05 and rootvg has enough free disk space,

I first extend logicail volume space on /dev/hd2. I am not sure if I can use chfs -a size=+28000000 /usr. Will it be harmful to file system integrity when expanding file system?

Can I do it in runlevel 2 or I have to do it in manitenance mode?

Similar question for /tmp.


Thanks

[SESHAN SENGA]

I believe there is no need to go to maintance. To change the size of file system.

[rydekull]

Well, i've only once had a problem with chfs, and it was during my shrinking of a applicationvg. Never had any problem with expanding a filesystem however I could assume that you wouldnt want it at the Highest load it could. But a normal load is probably not any trouble.

Oh, and these days since... well some versions back. chfs -a size=+100M /tmp will work fine.

Mind you, all this is just my thoughts and I dont leave any guarantees.

[alexisl]

If you have the space there should be no problem changing the size. The chfs command will work but I use smit to avoid typos and no you don't have to be in maintenance mode. We have done this quite a few times on our p570 machines.

[ross.mather]

Of course you can make your sums easier using chfs -a size=+20M /usr of 20G if you like....

No maintainence mode needed.......

cheers
Ross

[riscy]

Sometimes it's easier to specify the absolute size of the filesystem. Then you may use the command below:

chfs -a size=10G /<filesystem>

or whatever your requirements are. ;-)
Riscy

[guava]

Thanks for all the reply. I called IBM, they basically said same thing. Just issue chfs -a size= and no worry!
I was a little bit concerned when I did online /usr /var /tmp expansion. It did give me a little CDE problem(CDE was gone after expanding FS). However it was easy fix. Since OS is constantly using /tmp /var and command chfs also from /usr, I wonder it could cause any problem.