how badly does encrypting the root file system crush my performance?

[Robert P. J. Day]

On Mon, 25 Feb 2008, Alan wrote:

> > On 2/25/08, Alan <alan at clueserver.org> wrote:
> >> >
> >>  >   the context here might make this question inappropriate, but i
> >>  > installed f9 alpha inside virtualbox in two different ways, with only
> >>  > one difference -- whether the all-encompassing root file system was
> >>  > encrypted or not.
> >>  >
> >>  >   within virtualbox, the encrypted VM is *waaaaay* slower than the
> >>  > unencrypted one.  should i expect the same performance difference
> >> with
> >>  > regular hard disk installs?  just curious.  i expected a difference
> >>  > but this is *hugely* noticeable and almost unusable.
> >>
> >> That sounds like an artifact of virtualbox.  I am using full disk
> >>  encryption on F9 alpha and I am seeing little, if any, slowdown.  Maybe
> >>  64-bit helps.
> >
> > Same here, on i686.
>
> As a side note, I have run VMWare with and without the hardware
> virtualization.  It DOES make a difference.  I do not know if
> VirtualBox uses the hardware virtualization.  If it does not, it
> should.

that may be, but the difference here has nothing to do with whether
the H/W virtualization is being used or not, it's whether encryption
is being used or not.  in both cases, the status of the H/W
virtualization is going to be the same.

rday
--

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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca                          Waterloo, Ontario, CANADA
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