Re: [ADSM-L] Data Deduplication
2007-08-30 10:37:02
>> On Wed, 29 Aug 2007 13:40:34 -0600, Kelly Lipp <lipp AT STORSERVER DOT COM>
>> said:
> I'd like to steer this around a bit. Our sales folks are saying
> they are losing TSM opportunities to de-dup vendors. What specific
> business problem are customers trying to solve with de-dup?
> I'm thinking the following:
> 1. Reduce the amount of disk/tape required to storage backups.
> Especially important for all an all disk backup solution.
which I love.
"We don't need tape, because disk is cheap!"
[...hiatus...]
"We have to save disk! Buy (and integrate, and manage) a new product!"
> 2. Reduce backup times (for source de-dup I would think. No benefit in
> target de-dup for this).
> 3. Replication of backup data across a wide area network. Obviously if
> you have less stored you have less to replicate.
> Others? Relative importance of these?
> Does TSM in and of itself provide similar benefits in its natural
> state? From this discussion adding de-dup at the backend does not
> necessarily provide much though it does for the other traditional
> backup products. Since we don't dup, we don't need to de-dup.
I think a back-end de-dup (de do da da) would still offer advantages
to TSM: if you've got mumblety-hundred (e.g.) Win2K boxen, then most
of their system and app space would be identical. This could,
concievably, end up as close to one system-images' worth of space on
the back end. In a fantasy. :)
However, the server would need to do an awful lot of work to correlate
all these data.
- Allen S. Rout
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