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From: Paul Sladen (vserver_at_paul.sladen.org)
Date: Fri 09 Jan 2004 - 14:49:55 GMT

On Thu, 8 Jan 2004, Gregory (Grisha) Trubetskoy wrote:

Hello Greg,

[First, let me carefully state that I have not used either of the
proprietary products you mention.]

If anyone has a legal way for me to have a look at them, without the need
for me to sign an NDA, I'd be happy to do a more recent write-up comparing
the various technologies and approaches, I started but didn't finish this:
(Dated October 2002...)


> I've seen quite a few mentions of Virtuozzo and Ensim VPS solutions.

Virtuozzo (based on the two-year-old kernel source code I've seen) is *very*
like `vserver'. The code that I have is here:


Ensim is similar to FreeVSD in that [I believe] it is a pure-userspace
solution and as you describe it is ``very like a chroot''.

> The best I could determine is Virtuozzo is more like vmware,

Definately not, it has the same advantages that vserver has--which is the
security and separation without the overhead. Neither is Virtuozzo like
UML (multiple kernels).

H-Sphere can now use `vserver' underneath after the work IIRC Alex was paid
to do in adding the features they specifically wanted.

What Virtuozzo/Ensim/H-Sphere/Whatever *do* have going for them are the
management tools built on top. Things like replication are wrapped up in
a nice clickable HTML button and a end-user `lickable' GUI/Web front-end.

The same reason people buy Cobalt Raqs;
the *interface* is what they are paying for.

Hope that helps, E&OE, corrections welcomed,


War is inconsistent with Truth.  London, GB

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