We are actually looking into the cost difference. 
>From what I understand, IBM is offering both. However, per terabyte licensing 
>eliminates sub-capacity licensing.
And it is your entire site. Not just where it works out best.

We are in the midst of passport renewals and found an increase due to core type 
upgrades.

Previously we had older xeons using 50 PVUs per core. And the new machines 
replacing the older ones are either same cores but at xeon 5540 cores which are 
now 70 PVUs or double the cores. 
They brought up per TB licensing. Since then sales has sent me two E-mails 
inquiring total number of hosts, total TSM sites and total library capacity at 
each. 
I was hesitant to say the least. 

It's been about a week and I haven't heard back yet. When I hear more I'll drop 
a line.



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Skylar Thompson
Sent: Saturday, September 26, 2009 11:02 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Per terabyte licensing

We're in that boat too. We have a GPFS cluster we expect to grow into
the petabyte range, so unless IBM sets the per-byte cost *really* low
we'll get hammered with that licensing scheme.

Zoltan Forray/AC/VCU wrote:
> Or more costly.  We have test VM servers with quad-core processors running
> 15-VM guests.   If I started counting by T-Bytes backed-up, it would cost
> a lot more than 4-CPU's!
>
>
>
> From:
> David Longo <David.Longo AT HEALTH-FIRST DOT ORG>
> To:
> ADSM-L AT VM.MARIST DOT EDU
> Date:
> 09/25/2009 03:22 PM
> Subject:
> Re: [ADSM-L] Per terabyte licensing
> Sent by:
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
>
>
> Haven't heard that.
> My first thought is that it would make licensing
> a LOT easier to figure out!
>
> David Longo
>
>>>> Thomas Denier <Thomas.Denier AT JEFFERSONHOSPITAL DOT ORG> 9/25/2009 3:09 
>>>> PM
>>>>
>>>>
> Within the last few months there was a series of messages on counting
> processor cores. A couple of the messages stated that TSM is moving to
> licensing based on terabytes of stored data rather than processor
> cores. Where can I find more information on this?
>
>
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--
-- Skylar Thompson (skylar2 AT u.washington DOT edu)
-- Systems Administrator, Genome Sciences Department
-- University of Washington, School of Medicine