I also have TSM 5.5 and Protectier and getting 4 to 1.

Have mainly Windows, 400+, plus a few dozen Linux, AIX.  Has "some" SQL dumps 
and Oracle exports and yes some compressed data.

Most of that though I keep on LTO tape - fronted by disk pools.

My general understanding is that there is a general reduction in dedup ratios' 
across all vendors due to there gradually being more compressed and encrypted 
data sneaking in here and there.

David Longo

>>> "Druckenmiller, David" <drucked AT MAIL.AMC DOT EDU> 11/12/2010 11:23 AM >>>
I'm curious what others are seeing for de-dup ratios for various methods.

We're using IBM's ProtecTier for our TSM (5.5) primary pools and only see about 
a 4 to 1 ratio.  This is less than half of what IBM was projecting for us.  We 
have roughly 400 clients (mostly Windows servers) totalling about 135TB of 
data.  Biggest individual uses are Exchange and SQL Dumps.

Just wondering what others might be getting for other appliances or with TSM v6?

Thanks
Dave



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