That is not a DD-specific thing, that’s
a de-dupe thing. You can’t dedupe encrypted data. As to whether it can
dedupe digital imagery, it will if you’re backing up multiple copies of
the same image (e.g. repeated fulls of a directory with images in it), but if
you’re constantly storing new data (e.g. seismic data, telemetry data)
and only backing up the new data, it won’t dedupe. (This is also true of
any dedupe solution.)
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Steven L. Sesar
Sent: Friday, January 04, 2008
7:30 AM
To: Ed Wilts
Cc:
veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Backup
Strategy
Oh, absolutely! If you store digital imagery, for
instance, DD becomes very, very expensive! Encrypted data is another example.
Ed Wilts wrote:
On 1/4/08, Steven L.
Sesar <ssesar AT mitre DOT org>
wrote:
I second Data Domain as a disk target for backups!
We evaluated them here and they don't work with a darn in our
environment. For small parts of our environment (replicating remote sites
back here), a PureDisk solution is working well but for our main data store,
the DD stuff doesn't justify itself.
DataDomain is a good tool, but not necessarily the right tool for every
job.
.../Ed
--
Ed Wilts, Mounds View, MN, USA
mailto:ewilts AT ewilts DOT org
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Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
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--
===================================
Steven L. Sesar
Lead Operating Systems Programmer/Analyst
UNIX Application Services R101
The MITRE Corporation
202 Burlington Road - MS K101
Bedford, MA 01730
tel: (781) 271-7702
fax: (781) 271-2600
mobile: (617) 519-8933
email: ssesar AT mitre DOT org
===================================