Deduplication of encrypted volumes

[twlytle]

Hello,

I have been researching encrypting volumes, its that "Data at Rest" issue... Anyway, I was told that deduplication cannot work on encrypted volumes. Is this true?

Second question regarding Encrypted volumes, is there a big performance hit when Veeam backups an encrypted volume?

Thanks for your help,

Tom

[foggy]

Tom, yes, encrypted data cannot be deduplicated. Backup performance is not affected by encryption.

[tsightler]

Not only that, but encrypted volumes generally cannot be compressed either. This can indirectly have a negative impact on overall backup performance simply because you have to write much more data to the target storage.

[foggy]

Good point, Tom. Thanks.

[twlytle]

Thanks guys, This is very helpful.

That answers the question of just encrypt everything response

[Collodion]

Hi all,

With the awesome new ability in V8 to encrypt Veeam backups, what are the implications for storing Veeam backups on deduplicated volumes? We currently store our Veeam backups on a Quantum DXi device with deduplication and I'm wondering if enabling encryption in Veeam will prevent backups from being deduplicated?

The same question also applies for those of us who might be backing up to a Windows 2012 deduplicated volume.

Cheers,

Collodion

[foggy]

Correct, encryption will "break" all external data reduction techniques, including deduplication.

This is not the case with Veeam B&R built-in compression though, as we compress that data before we encrypt it.

[kins]

Is it supported to send encrypted backup copy jobs to a Server 2012 R2 de-duplicated volume?

[veremin]

You can send encrypted data blocks to dedupled volume, they won't be deduped, though. Thanks.