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Date:      Thu, 15 Jan 2009 00:20:54 +0100
From:      Roland Smith <>
To:        RW <>
Subject:   Re: freebsd encrypted hard disk?
Message-ID:  <>
In-Reply-To: <>
References:  <> <> <>

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On Wed, Jan 14, 2009 at 10:55:38PM +0000, RW wrote:
> On Wed, 14 Jan 2009 18:59:54 +0100
> Roland Smith <> wrote:
> >  Geli is
> > convenient and seems to work well. On modern machines the performance
> > penalty is slight. It supports well-regarded encryption algorithms
> > like AES and Blowfish.
> It depends on what you mean by modern, and slight, on my single-core
> amd64 2.8G the performance penalty of geli is substantial.

True for a single-core machine.

> Not just in reduced transfer rates, but also in terms of CPU cycles
> used - a sustained geli to geli file copy makes things really slow for
> me.

That's probably because two geli kernel threads are competing for time
on a single core. I've had problems with that as well (geli-encrypted
USB drive stalling).

Since I've switched to a multi-core machine (where the number of cores
should be at least equal to the number of geli-encrypted devices), CPU
load for gele has dropped to barely noticable.

Looking at the machines on sale at local computer stores only the
absolute rock-bottom spec-ed machines are single core these days.

[plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated]
pgp: 1A2B 477F 9970 BA3C 2914  B7CE 1277 EFB0 C321 A725 (KeyID: C321A725)

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Version: GnuPG v2.0.9 (FreeBSD)



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