Re: [Veritas-bu] Question for NetBackup 7.0 Dedup userORData Domain users
2010-08-25 11:43:16
You are correct. It is licensed on front in TB. In other words if you backed
up everything full once, however much that data comes up to is how much you
have to pay. From my understanding in talking with reps and reading the
documentation, replicated data maintains its deduped state in transport. You
could replicate the data to 50 different sites, but you still only need to pay
for that initial front in TB.
What I am hoping to hear is to prove or disprove Data Domain's claim to us that
we would only see about a 4:1 dedupe ratio with NetBackup's dedupe. From
others I have talked to, the ratio has been much closer to 10:1 or 15:1.
-----Original Message-----
From: Martin, Jonathan [mailto:JMARTI05 AT intersil DOT com]
Sent: Wednesday, August 25, 2010 11:35 AM
To: Mark Glazerman; stefanos; Travis Kelley; judy_hinchcliffe AT administaff
DOT com; Alley, Chris; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Question for NetBackup 7.0 Dedup userORData Domain
users
I've just recently had a meeting with my Symantec rep, and we were led to
believe that license cost and replication were NetBackup advantages. For
example, I was under the impression that if you backed up 10TB of data weekly,
but kept 100 deduped copies on 40TB of storage, that you only needed 10TB of
license. Also, we were told NetBackup dedupe maintains replication to an
offsite media server, and that you don't have to pay for that 40TB of storage
either. Is this not the case? We haven't talked to Data Domain yet, but that
licensing model looks like a serious advantage to Exagrid's $6,000 / TB.
-Jonathan
-----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 Mark
Glazerman
Sent: Wednesday, August 25, 2010 11:22 AM
To: stefanos; 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 userORData Domain
users
Using the ddboost ost plugin from Data Domain in conjunction with Netbackup
moves the metabase comparisons from the data domain appliance to the media
server. This dramatically reduces the amount of backup traffic being sent to
the data domain and speeds up the backups considerably.
We looked at NBU 7's built in dedupe and saw ok numbers on small file, OS type
backup data but for applications like exchange where we currently store around
40 full copies in 1.8TB of space on our data domains, we couldn't get 4 copies
in the same amount of space using netbackup's dedupe. The fixed block dedupe
algorithm of netbackups built in dedupe cannot handle large files as well as
the variable block compression algorithms of the data domain.
Also.. from a licensing point of view we worked out it was essentially $1000
per TB to license dedupe in Netbackup (Enterprise disk option and dedupe is
licensed per TB). This is something you have to factor in, especially if you
have a large environment. Replication of this backed up data is something else
you'd need to devise a solution for. With data Domain, the replication part
is easy.
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 stefanos
Sent: Wednesday, August 25, 2010 3:02 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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