ADSM-L

Re: Encryption

2002-10-22 08:57:08
Subject: Re: Encryption
From: "Cook, Dwight E" <DWIGHT.E.COOK AT SAIC DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 22 Oct 2002 05:34:04 -0700
Been a while and I'd have to double check but...
You might not want to use compression if you use encryption...
I believe it encrypts first then tries to compress and encrypted data
doesn't compress (much).
Something to double check.

Dwight



-----Original Message-----
From: J D Gable [mailto:josh.gable AT eds DOT com]
Sent: Monday, October 21, 2002 4:13 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Encryption


Does anybody have any evidence/research as to what kind of additional
overhead encryption puts on a client when processing a backup (CPU,
Memory, etc.)?  I am running some tests myself, but the numbers are
staggering (we're seeing up to a 300% increase in the backup time in
some cases).  I understand that it is largely based on the horsepower of
the node, but I was wondering if anyone else is seeing the same, or if
anyone knew a place I could get some additional info on encryption.

Thanks in advance for your time,
Josh

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