Re: [Veritas-bu] Fw: Data Domain Question
2011-08-16 14:21:54
In order to answer that question, another
couple of questions would have to be asked:
1. How long are you going to retain
these dumps? I am assuming that they are uncompressed. The
longer you retain your backups, the better your deduplication ratio will
be. We are wrapping up a proof of concept on a DD 860. At the
end of our "Open Systems" (Windows/UNIX/Linux) part of the evaulation,
we were getting 35:1 dedup ratio after 2 months. We were doing full
backups every day. We were dumping database data (DB2 and SQL) directly
to Netbackup via their respective agents.
2. How much does the database
change between backups? You will have to talk to your DBAs and get
this information. This may not be significant, but you need to find
out before you purchase something that will be unable to deliver the results
you expect.
In my opinion, uncompressed database
dumps are the best candidates for deduplication if your data only changes
10-20%. When I introduced the DB dumps to NBU to the DataDomain,
my dedup ratios accelerated significantly.
My 2 cents.
From:
| ccosta.ccc AT gmail DOT com
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To:
| VERITAS-BU AT mailman.eng.auburn DOT edu
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Date:
| 08/16/2011 02:06 PM
|
Subject:
| [Veritas-bu] Fw: Data Domain Question
|
Sent by:
| veritas-bu-bounces AT mailman.eng.auburn DOT edu |
------Original Message------
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Data Domain Question
Sent: Aug 16, 2011 1:59 PM
To all,
I am interested in finding out what deduplication ratios users are seeing
when backing native SQL dumps to a Data Domain array?
Having friends who work for EMC, they say 3:1 to 4:1, but I am looking
for real numbers that users are seeing not the sales numbers.
Please let me know
Sent via BlackBerry from T-Mobile
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