Subject: Re: [Veritas-bu] Question for NetBackup 7.0 Dedup userORData
Domain users
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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