Actually - EMC just gave a presentation here of their BURA
(BackUP/Recovery/Archive) stuff. I gather the deduplication device they
sell will allow you to backup to tape if you want but not with NBU
unfortunately. To use NBU you'd still have to do standard
duplication/vaulting.
We're doing vaulting from our dedupe Data Domain devices to tape.
If you really only want to store deduped data remotely you might want to
look at putting a unit at offsite storage or your DR site. Both Data
Domain and EMC allow you to push the deduped data across WAN that way.
I'm guessing the other vendors do as well.
-----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
Rosenkoetter, Gabriel
Sent: Monday, April 28, 2008 10:35 AM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Deduping with Tape as a final destination
All of the deduplication products available currently provide
deduplication only at the disk STU. Whether you use their mechanisms or
NetBackup Vault to later copy that data off onto tape media, the data
written to tape will be "reduplicated".
A DataDomain sales rep mentioned, when a coworker pursued this same
question some time ago, that they knew of various customer requests to
maintain deduplication on tape media, but it's not something NetBackup
currently provides a way to manage (remember that deduplication devices
are essentially black boxes for NetBackup: they're taking care of the
hashing of data, but on recovery they're recovering the full data set,
and the same thing when you run a duplication job to tape), and it's a
questionable desire with regards to DR strategy.
I certainly see how it sounds attractive for media purchasing and slot
space at Iron Mountain, but it does change the meaning of a tape back
for DR purposes and the way you'd use that backup.
--
gabriel rosenkoetter
Radian Group Inc, Unix/Linux/VMware Sysadmin / Backup & Recovery
gabriel.rosenkoetter AT radian DOT biz, 215 231 1556
-----Original Message-----
From: mbpettis [mailto:netbackup-forum AT backupcentral DOT com]
Sent: Saturday, April 26, 2008 3:55 PM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Deduping with Tape as a final destination
So, ultimately, the data copied to the tape will be the full amount of
the data and not the deduped data? For example, the original 100GB
deduped down to 20GB will be the full 100GB and not the 20GB? Or will it
be the 20GB, with Netbackup referring back to the index and/or base
data?
Thanks,
Michael
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