We are currently in the process of testing out Direct Tape Copy on the
NetApp NearStore VTL's.

The results we are seeing is that we are getting better than 50MB/sec with
LTO-3 drives writing to LTO-2 tapes.  We can attach up to 3 drives per 2GB
fiber-channel port.  We figure we can do about 4TB/day per drive or up to
12TB/day for one NearStore VTL.

Compare that to the very poor performance of the vault/duplication process
which we have found to be on the order of roughly 11MB/sec or about 1TB per
day per LTO-3 drive.

We are still testing and have not yet made the switch over to this, but
right now it looks very promising.  If we do make the switch we will not use
vault for anything except for maybe container management.

--stuart

-----Original Message-----
From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of T H
Sent: Wednesday, October 18, 2006 6:10 PM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Data de-duplication solutions

Hi everyone,

I have seen subjects on data de-duplication here. For those using such type
of solutions such as data domain, pure disk etc:

- What are your experiences? 
- Do you lose any throughtput while using such solutions and any worries
with data corruption? 
- The bulk of our backup data is Oracle so does the solution you have work
with Oracle? 
- Can one use the solution with existing NetBackup agents (no interest in
deploying new client SW for 1000's of servers)?
- Do you replicate the data offsite and how is that working for you?

Any feedback is highly appreciated.

Thanks,
Tambaa



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