I think you will save space in the both primary and copy pools because of 
compression, but de-duplication rate in primary pools will be reduced because 
of compression. In my opinion, in most of the case compression+deduplication is 
better than just deduplication, if you are ready to ignore increase in backup 
time and more heavy load on clients during backups because of compression.

Grigori G. Solonovitch

Senior Technical Architect

Information Technology  Bank of Kuwait and Middle East  http://www.bkme.com

Phone: (+965) 2231-2274  Mobile: (+965) 99798073  E-Mail: G.Solonovitch AT bkme 
DOT com

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-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Jeff Brunt
Sent: Tuesday, February 09, 2010 9:53 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] TSM 6.1 dedup

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.


Jeffrey S. Brunt
Corporate IT Operations
Chief Information Office
902-424-0885
Pplease consider the environment before printing this e-mail.

Please consider the environment before printing this Email.

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