Here is a real general question . . . . .

How do you handle tsm upgrade testing?

When a new release comes out do you:

a)  dump it on you server, upgrade and see if it works?
b)  create a test instance and try it out first?

Related questions:

1)  I know you can have multiple tsm instances running concurrently
on a server.  Can you have multiple tsm instances that are running
different tsm versions on the same server?

2)  Do you keep a test instance around so you can play with new
features without effecting your production system?


Thanks

Rick