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Date:      Wed, 22 Nov 2006 10:30:38 -0500
From:      Bill Moran <wmoran@collaborativefusion.com>
To:        VeeJay <maanjee@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Does disk encryption causes a performance penalty for Data Access/Read/Write, etc
Message-ID:  <20061122103038.758d313c.wmoran@collaborativefusion.com>
In-Reply-To: <2cd0a0da0611220715n7e88564ahe19f20d033ed39a9@mail.gmail.com>
References:  <2cd0a0da0611220715n7e88564ahe19f20d033ed39a9@mail.gmail.com>

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In response to VeeJay <maanjee@gmail.com>:
> 
> Does *disk encryption* causes a *performance* penalty for Data
> Access/Read/Write, etc?

Any kind of encryption causes a performance penalty.

However, if your CPU is powerful enough, it's possible (even likely) that
the CPU is still able to encrypt faster than the disk can write the data.
The result would be that you won't notice the penalty unless you've got
other CPU-intensive tasks running that reduce the amount of CPU
available to the encryption process.

HTH

-- 
Bill Moran
Collaborative Fusion Inc.



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