Avamar is faster than DD for backups. We have a Cellera NAS that is currently 
holding 18TB worth of data and Avamar backs it up via an NDMP Accelerator Node 
anywhere from 6-9 hours, which is well under our backup window, whereas we 
could never meet that window if we used NetWorker and DD to back it up. 

The converse also seems to be true where DD is faster for restores than Avamar, 
so you pick your poison.

I also find the  NetWorker Console Manager more challenging to use than 
Avamar's administration GUI to quickly identify failed backups. The Avamar 
admin GUI, has an activities window where I can easily see at a glance exactly 
which servers backed up (when they backed up and their duration) and quickly 
identify any backup failures. On NetWorker, you have to go through the NMC 
monitor and drill into any groups that failed to find out which clients within 
them failed and answering a simple question from a SA here is much easier with 
Avamar's admin GUI than we NetWorker DD. That question is "What time was my 
server backed up and how long did the backup run?"

On Jan 29, 2013, at 1:14 PM, Tony Garza <TGarza AT FROSTBANK DOT COM>
 wrote:

> What do you consider the weakness of the DD device?
> 
> 
> 
> From: "Stanley R. Horwitz" <stan AT TEMPLE DOT EDU>
> To:   NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Date: 01/29/2013 11:53 AM
> Subject:      Re: [Networker] EMC Networker with Avamar
> Sent by:      EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
> 
> 
> 
> In my little corner of the world, we have both NetWorker, Data Domain, and
> Avamar.
> 
> We use Data Domain with NetWorker and Boost and a small tape library. We
> use Avamar standalone.
> 
> Both DD and Avamar work well for us. Each has their strengths and
> weaknesses.
> 
> On Jan 29, 2013, at 12:34 PM, jango <networker-forum AT BACKUPCENTRAL DOT COM>
> wrote:
> 
>> I agree with you Justin. I personally like NW integrated with Data Domain
> (o'coz with DD boost). We have a similar configuration and I like the fact
> that DD run hassle free and has been very stable over the years.
>> 
>> Regards,
>> 
>> Jango
>> 
>> +----------------------------------------------------------------------
>> |This was sent by ranjit.jacob AT gmail DOT com via Backup Central.
>> |Forward SPAM to abuse AT backupcentral DOT com.
>> +----------------------------------------------------------------------