Hello Steve , 

Here are some figures 

I use TDP for VE 6.4 ( Incremental forever ) I keep 14 generations / Days of 
backup 

On one of my instance , I backup 72 VM machines ( 90 % are Windows  10 %  Linux 
) 

I have 6.7 TB of primary storage used for those 72 VM  on my tsm server  ( no 
dedup / no compression )

I checked last night backup stats 

It  did restore  1.4 GB ( control files to manage its incremental ) 
And backed up 130 GB  in 1h 45  ( I have a limit of max 6 VM backup in parallel 
to limit resource utilization )

Not sure if that helps...

Eric 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Steven Harris
Sent: Wednesday, May 15, 2013 11:20 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: TSM for VE sizing vs standard incremental forever

Hi All

I've been asked to do some ballpark sizing for a major rework of a TSM
environment. Clients are linux and Windows under Vmware

This customer has been using standard BA client backups up until now, ie
incremental forever, and the new env will be TSM for VE with the backend
being tape rather than disk so no dedup possible.

Given that TSM for VE uses some funky differential backup technology on
the changed blocks, how much data does your typical VE installation
backup per day per protected TB?  Anyone with real world data out
there?  Sorry it is such an open question but anything you can give me
is better than a stab inthe dark.

Regards

Steve

Steven Harris
TSM Admin
Canberra Australia