[Veritas-bu] Encryption option
Dan.Otto at veritas.com
Mon Aug 23 14:17:48 CDT 2004
Does using encryption affect backup performance, YES, and it can, but
mainly on the client side. There shouldn't be an impact on the servers
themselves. See below for details.
First the marketing response-
There is no hard data on performance impact of switching on encryption
but in general the less network bandwidth and the slower the client's
CPU, the more noticeable the hit. Every effort has been made to minimize
the performance problems that could occur as a result of implementing
encrypting. The encryption happens on the client not on the media
server. NBU handles the encryption functionality this way because if the
encryption were performed on the NBU media server, some customers might
complain that this extra load on the media server would burden the media
server and lower performance.
Now for the real world response-
In reality, enabling encryption on client backups can have up to 3 times
performance impact on backing up that client. The encryption pack uses
software encryption with either a 40 bit or 56bit algorithm and is very
cpu and memory intensive.
Therefore you are left with a business impact decision. This performance
is a trade off for using client side encryption. This isn't really a
client platform tuning issue as there is nothing available to tune. It's
your client having the raw resources available (cpu, memory, etc) to
drive the encryption faster.
From: Hubler, Daniel [mailto:daniel.hubler at cobalt-corp.com]
Sent: Monday, August 23, 2004 2:03 PM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Encryption option
I would like to hear anybody's experiences with the NetBackup encryption
This would be for v4.5.
Especially interested in information about performance.
daniel.hubler at cobalt-corp.com
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