Our Environment is not as large as yours, but to enlarge your adsm
environment this way, you have to plan:

needed throughput: how much data do you expect and can your network
handle this? (Do you back up databases or database dumps or 'only'
filespaces with large amounts of never-changing data)?

needed tape capacity (how long will you keep how much data)?

how long will actions like copy stgp or exp inventory take? Cpu or
storage constraints on the adsm server?

what about restore ? Multiple clients at a time? How much? network?


Regards
Roger