We recently got some IBM servers which came with AIX 5.3 pre-
installed. I mirrored the OS and then grew the filesystems:

Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/hd4 8.00 7.97 1% 1980 1% /
/dev/hd2 6.00 4.56 24% 31977 3% /usr
/dev/hd9var 8.00 7.90 2% 706 1% /var
/dev/hd3 2.00 1.78 12% 225 1% /tmp
/dev/fwdump 0.12 0.08 39% 5 1% /var/
adm/ras/platform
/dev/hd1 2.00 2.00 1% 10 1% /
export/home
/proc - - - -
- /proc
/dev/hd10opt 8.00 7.63 5% 6089 1% /opt

So the way I see it is I have 34.12GB partitoned and only 1.3GB being
used. This includes 3rd party stuff we've added and TL5 stored under /
usr for now. On Solaris the / partiton grows by GBs after installing
from CD. Is AIX really only 300MB or so?

On 2007-06-22, MJB <helios123@cox.net> wrote:

> Filesystem GB blocks Free %Used Iused %Iused Mounted on
> /dev/hd4 8.00 7.97 1% 1980 1% /
> /dev/hd2 6.00 4.56 24% 31977 3% /usr
> /dev/hd9var 8.00 7.90 2% 706 1% /var
> /dev/hd3 2.00 1.78 12% 225 1% /tmp
> /dev/fwdump 0.12 0.08 39% 5 1% /var/
> adm/ras/platform
> /dev/hd1 2.00 2.00 1% 10 1% /
> export/home
> /proc - - - -
> - /proc
> /dev/hd10opt 8.00 7.63 5% 6089 1% /opt
>
> So the way I see it is I have 34.12GB partitoned and only 1.3GB being
> used. This includes 3rd party stuff we've added and TL5 stored under /
> usr for now. On Solaris the / partiton grows by GBs after installing
> from CD. Is AIX really only 300MB or so?

No, it's not. You seem to assume that the OS lives in / only, but on many
UNIX or UNIX-like operating systems, / is actually quite small. A default
installation of AIX puts much more in /usr than it puts in /. (Of course,
all this assumes that you don't put /usr in the same filesystem as /)


--
Jurjen Oskam

Savage's Law of Expediency:
You want it bad, you'll get it bad.

On Jun 22, 9:00 pm, MJB <helios...@cox.net> wrote:
> We recently got some IBM servers which came with AIX 5.3 pre-
> installed. I mirrored the OS and then grew the filesystems:

Why oh why??

AIX is not pre-partitioned. You can and should create new file-systems
separately to the the O/S...

Your O/S file-systems are huge for no good reason. You can increase
their sizes dynamically at any stage, why be wasteful upfront? Things
like the AIX installer (installp) will automatically grow file-systems
during installations.

If you simply keep the O/S file-systems at a sane utilisation (e.g.
70% or so), you should never have a problem.

Third party apps. are usually installed to non-O/S disks (usually fast
external disk subsystems), and in non-O/S FS.

Installing to the O/S areas just increases the risk of accidentally
overwriting libraries & binaries that should be left untouched.

Keep the O/S in rootvg and your apps. in another VG.

Regards,
Niel

MJB wrote:
> We recently got some IBM servers which came with AIX 5.3 pre-
> installed. I mirrored the OS and then grew the filesystems:

It's probably unnecessary to allocate such large chunks of unneeded
space to your filesystems, and instead shrink them back down to a more
reasonable size in case you need disk space for something else (e.g. /
export/home seems like a consistent space hog). You can always make
any file system larger later, so there's not necessarily a need to pre-
allocate a huge chunk of free space.

Run something like this to defrag your rootvg file systems in
preparation for shrinking:

for fs in $(lsvgfs rootvg); do
defragfs $fs
done

Then adjust your file system sizes thusly:

chfs -a size=1G /
chfs -a size=3G /usr
chfs -a size=1G /var
chfs -a size=1G /tmp
chfs -a size=1G /opt

--
RR

On Jun 23, 3:20 pm, RR <oss...@gmail.com> wrote:
> MJB wrote:
> > We recently got some IBM servers which came with AIX 5.3 pre-
> > installed. I mirrored the OS and then grew the filesystems:
>
> It's probably unnecessary to allocate such large chunks of unneeded
> space to your filesystems, and instead shrink them back down to a more
> reasonable size in case you need disk space for something else (e.g. /
> export/home seems like a consistent space hog). You can always make
> any file system larger later, so there's not necessarily a need to pre-
> allocate a huge chunk of free space.
>
> Run something like this to defrag your rootvg file systems in
> preparation for shrinking:
>
> for fs in $(lsvgfs rootvg); do
> defragfs $fs
> done
>
> Then adjust your file system sizes thusly:
>
> chfs -a size=1G /
> chfs -a size=3G /usr
> chfs -a size=1G /var
> chfs -a size=1G /tmp
> chfs -a size=1G /opt
>
> --
> RR

RR-

Thanks for the advice. Coming from a Solaris background which usually
allocates parttion sizes up front. Will follow your advice -

Thanks