Renee,

We're testing OST as I write this !!  We've actually been testing OST and the 
new dedupe in NBU 7.0.  We've been running our exchange backups to an OST 
storage unit and have seen higher throughput speeds compared to our regular 
CIFS backups in the limited testing we've done (40mb./sec average compared to 
20-25mb/sec). We're leaning towards it being worth the licensing fee to shorten 
our backup windows, even by a small amount.

The built in dedupe works great for windows OS backups but didn’t work too good 
for our exchange backups  (the default fragment size worked against us with 
exchange data).  Also the throughput to disk attached to the media server is 
much higher than we get to the Data Domain appliances (we hit a peak of 
70mb/sec on some of those backups) but they are faster disks so we'd expect 
this.

Our testing seems to be showing that the OST will be used on data that we 
continue to send to the data domains but we'll be able to push a lot of our 
backups through a couple of additional media servers to some dumb disk, using a 
mix of client side and media server dedupe.

I'll update some more when we have some more testing completed.

Mark Glazerman
Desk: 314-889-8282
Cell: 618-520-3401
 please don't print this e-mail unless you really need to


-----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 Renee 
Carlisle
Sent: Friday, July 16, 2010 4:24 PM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] Data Domain OST

Is anyone out there using a Data Domain with the OST plug in for NetBackup? 
(Especially if you are running NBU 7)  Can someone give me a rough idea what 
kind of performance numbers you are getting....just looking for an average mb/s 
per stream on typical backup jobs.  Don't need a lot of detail, just wanting 
some rough ideas.

Thanks

Renee
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