It will definitely apply compression algorithms, regardless of the state of the data which is being backed up.


===================================

   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

===================================




-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu on behalf of Kathryn Hemness
Sent: Mon 6/25/2007 6:12 PM
To: Jeff Lightner
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Encrypted backups of already encrypted data

Thanks, Jeff.

My assumption was the same.  I didn't think that NetBackup would bother
to perform any checks to see if a file was already encrypted.

My question was prompted from one of my clients.  I don't have any way
of knowing if any of my backup clients are encrypting their disk filesystems
or partitions.  I certainly hope my clients haven't purchased a NetBackup
encryption license knowing their systems were already encrypting data.


On Mon, 25 Jun 2007, Jeff Lightner wrote:

> Date: Mon, 25 Jun 2007 14:10:44 -0400
> From: Jeff Lightner <jlightner AT water DOT com>
> To: Kathryn Hemness <cckat AT reality.ucdavis DOT edu>,
>      veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] Encrypted backups of already encrypted data
>
> I'm assuming it wood.  The NBU encryption method and keys would not
> necessarily be the same as those used for the original data.
>
> The question is if the data is already encrypted why would you want to
> slow down your backup by encrypting it again?
>
> -----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 Kathryn
> Hemness
> Sent: Monday, June 25, 2007 1:40 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] Encrypted backups of already encrypted data
>
> Greetings,
>
> If I'm running an encrypted backup of already encrypted data, does
> NetBackup re-encrypt the data?
>
> --Kathy
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
>


--Kathy

=======================================================================
Kathryn Hemness                        kfhemness AT ucdavis DOT edu
System Administrator                   phone: 530.752.6547
Campus Data Center & Client Services   fax:   530.752.9154
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