I have heard that TSM dedup can deal with TSM client-compressed data, but I 
have no first-hand experience, nor do I know if there are any tradeoffs.  We 
are in the same boat as you, and are thus looking forward to exploring this 
further.

At 01:53 PM 2/9/2010, Jeff Brunt wrote:
>I was reading some posts earlier this month about using the data domain 
>appliance and read that they recommend not using client compression.  I am 
>using TSM dedup and was wondering if that recommendation would still be true 
>as I have forced client compression on since all data is now going to disk, 
>and running dedup as well.


--
Paul Zarnowski                            Ph: 607-255-4757
Manager, Storage Services                 Fx: 607-255-8521
719 Rhodes Hall, Ithaca, NY 14853-3801    Em: psz1 AT cornell DOT edu