Hello,

We are currently using Data Domain in our infrastructure.  I need to ask
a couple of questions, are you going to replicate the data or just use
this as a backup target?  It appears that you are using the VTL solution
that they offer, that is where we have had our issue, and quite a few of
them.  The VTL solution is good if you are not going to replicate the
data.  It has taken Data Domain over a year to get the code to a point
where you can replicate the data and will not exceed to the point to
where it will not catch up. Pool level replication has been the solution
and our scrubbing the data that we actually replicate.

I would look at all the solutions that are out there, many storage
vendors are offering De-Dupe in there storage solutions.

Regards,

Steve 

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of ajgrif
Sent: Monday, February 11, 2008 8:51 AM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Anyone is using datadomain devices? Could you
shareyour exp


We're currently about 2 weeks in to eval of a 580.  I've been really
impressed with the compression so far.  We've been doing test backups of
our 2.5Tb SAP instance - after the first backup the post compression
size of that was 500Gb.  We've since been throwing a mix of data at it,
from Windows file server, Exchange, misc Oracle and SQL, and we're up to
about 10 to 1 compression.  

My biggest issue with the device is the hard limit on how much data it
can process.  No matter what I/O options you go with - i.e. VTL or GigE
- you'll always be limited to 220Mb per second.  No matter how fast you
get the data there, that's as fast as the DataDomain box can process it.
Getting a tape based solution to match these speeds is quite easy - a
properly configured fibre based tape library solution with, say 8 LTO3
drives, could easily handle 500+Mb per second.  Obviously comparing the
two is kind of an apples-and-oranges thing, but what I'm saying is that
I don't like having to max out a products capabilities just to get it to
work as I want.  I'd rather have it be able to handle whatever I throw
at and have extra capacity to spare.  Especially for the price tag that
the DataDomain devices carry.

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