I'm assuming most zSeries system use a standard 3390-3
volume (or less) for their base systems. What I've
noticed in the last few releases for zSeries and in
RHEL3 (beta) especially is the burgeoning size of
/usr.

For SuSE SLES8, I could get by with moving /usr to a
separate volume and I could everything but the
document pdf's on the volume.

I tried to install EVERYTHING on the redhat beta and I
had /usr on its own 3390-3 volume and the install
wizard said I needed another 1179 MB! (Being a
development shop, some of our people actually use a
lot of this stuff).

In fact, after a pared down install, I only used 6% of
the / volume and 72% of the /usr volume!

What alternatives do we have in the zSeries world for
this ever expanding filesystem?

- Larger volumes on an RVA or Shark (which performance
less well with lots of data behind a single UCB - no
PAV's)? Do a lot of people use large volumes on shark
or RVA? Do a lot of people actually use the SCSI
feature of shark?

- After building a minimal system, move /usr to an LVM
volume?

- Other alternatives?

I understand that the POSIX specs insist on certain
things, but what you end up with is about 15
direcotries using 8% of your space and one directory
using 92%. And the software install wizards of the
major distributors follow the POSIX rules...



=====
Jim Sibley
Implementor of Linux on zSeries in the beautiful Silicon Valley

"Computer are useless.They can only give answers." Pablo Picasso

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