> From: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
> Reply-To: <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
> Date: Tue, 17 Mar 2009 11:59:33 -0400
> To: <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
> Subject: [Networker] Encryption Questions
> 
> Hi,
> 
> How much overhead in terms of capacity will occur when encryption is on ?
> 
> << / >>
> + aes: *.*
> 
> We have LTO-3 tapes (400/800 GB) in the library with active compression but
> the tape with enrypted data is reaching its full capacity ~ 400 GB
> 
> NO COMPRESSION ??
>  
> Does the additional capacity due to encryption remain hidden ?

What do you mean by "hidden?" You're taking data and expanding every byte of
it when you encrypt it, so there certainly will require more overhead on the
client who's data is being encrypted and more space on whatever media you
back up to. How much of a hit in performance and space is something you need
to test.
 
> What is the default key for restoration ?

You would use the same key you used when you encrypted the data. There is no
default. You set the encryption key on your NetWorker server's server
resource.

> Is it same as "Pass Phrase" specified under NW server's properties >
> configuration tab ?

Yup. As far as I know, that pass phrase is only needed if you are encrypting
data via the aes asm.

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