Wanda,

I handle similar problem exactly how you want to handle it, and it works
pretty fine.
In the initial state I was even able to control a bit which client wil
go to which tape.

First I defined STG with one tape only (no scratch) and backed up three
very small nodes - all of them went to this tape.
Then I added second tape volume to this pool, and backed up fourth,
large node, It went to the second tape.
The I added another tape volume, etc. etc.

It works fine till now, and ADSM keeps this initial node/tape
connection..
Yes, this is of limited usability only , because at least then when one
client (or client group)
will overrun its/their tape, the association wil change. But with tapes
large enough
the initial order can last long enough untill larger tapes come on the
market.

bye, Juraj Salak, Austria

> Date:    Tue, 6 May 1997 10:45:25 -0400
> From:    "Prather, Wanda" <PrathW1 AT CENTRAL.SSD.JHUAPL DOT EDU>
> Subject: Colocating in a limited library
>
> We have an automated tape library.
> I just check in tape cartridges in "scratch" status, and let ADSM pull
> tapes as needed from the scratch pool into the backup and archive tape
> pools.
> My backup tape pool is colocated.
> This works fine because I have more cartridges than clients.
>
> But, we are about to add hundreds of clients, so that I will have more
> clients than cartridges.
> Each cartridge holds 35 GB, so I should be able to get several clients
> per cartridge with no problem, but I would still like to colocate for
> speed on restore..
>
> How do other people handle this situation?
> I think that probably all I have to do is stop using "scratch" tapes and
> manually define a fixed number of cartidge volumes to each pool.  Are
> there other considerations?