We wouldn't be able to do our backup replication to DR without the
de-dupe levels we get from DD.

We are seeing 30x dedupe on nightly backups which are mostly Incr
backups, and full backups for DBs and Exchange. If you are concerned
about minimizing your data utilization for your site to site
replication, DD is king.

On 8/25/2010 7:25 AM, Lightner, Jeff wrote:
> On the flip side because things like NetBackup do the work on the system
> being backed up it increases CPU resource consumption.   For us that
> would be a killer.   We've been using Data Domain for a couple of years
> on UNIX/Linux/Windows and have been quite happy with the dedupe ratios
> we get on everything including Oracle and MS-SQL databases.
> Additionally restores from the dedupe devices as compared to tape are
> incredibly fast.
>
> As others pointed out it does depend on what you're backing up.   Dedupe
> is great for environments where the preponderance of what you're backing
> up isn't changing.   Note that on the DD it is block level rather than
> file level so this doesn't mean your database files can't change (as
> they do every time they're update).   I'm not sure how NBU's dedupe does
> it (file or block).
>
> -----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 
> stefanos
> Sent: Wednesday, August 25, 2010 4:02 AM
> To: 'Travis Kelley'; judy_hinchcliffe AT administaff DOT com;
> CAlley AT kforce DOT com; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Question for NetBackup 7.0 Dedup user ORData
> Domain users
>
> The big difference between DataDomain (and all appliances) and nebackup
> deduplication option is that netbackup can do the process on the client.
> This will speed up the time of the backup.
> With DD and netbackup media server deduplication, nothing will change at
> your backup time, as all your data will travel to the media server.
>
> Do not listen to the companies about the deduplication ratio. Your data
> is
> unique, and nobody can predict the ratio. 
> Ask for a demo from both companies. 
>
> -----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 Travis
> Kelley
> Sent: Wednesday, August 25, 2010 12:38 AM
> To: judy_hinchcliffe AT administaff DOT com; CAlley AT kforce DOT com;
> veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Question for NetBackup 7.0 Dedup user OR Data
> Domain users
>
> Data domain also has a limit to the amount of data one of their units
> can track but its fairly high.  If you need more than 32TB of deduped
> data in PD you do need to deploy a seperate puredisk environment. Then
> PD just splits the hash space into chunks and stores data on whichever
> node it hases to.  I'm not sure what their upper limit is but it can
> scale quite high also.
>
> On 8/24/10, judy_hinchcliffe AT administaff DOT com
> <judy_hinchcliffe AT administaff DOT com> wrote:
>> Remember that the built in de-dup as a limit on the amount of data it
> can
>> keep track of.
>> Over that amount you need to use a de-dup appliance.
>>
>>
>> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
>> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Alley,
> Chris
>> Sent: Tuesday, August 24, 2010 4:09 PM
>> To: veritas-bu AT mailman.eng.auburn DOT edu
>> Subject: [Veritas-bu] Question for NetBackup 7.0 Dedup user OR Data
> Domain
>> users
>>
>> We are looking to change our backups to a disk based deduplication
> solution,
>> and 2 of our options are to utilize NetBackup 7.0's built in dedupe
> (Client
>> and Media server) or to put a Data Domain box in.  I wanted to see if
> I
>> could get some real world feedback on what you guys have been seeing
> in
>> terms of dedupe rates, performance, etc.  For example Data Domain
> claims
> we
>> would only see about 5:1 dedupe rate using NetBackup, which seems
> quite a
>> bit lower than what I would expect....and of course they claim they
> would
>> get about 20:1.  I realize that all data is different, which is why I
> have
>> hopes that several people will reply with what they are seeing.
> Thanks
> for
>> your time!
>>
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