How do they do their VPS product? [was Re: FreeBSD based web hosting?]

[OutBackDingo]

the libvirt stuff might be a clue, a while back I designed a virtual
system using libvirt and some ported linux code, which basiclaly acted
as an enhanced chroot for apache, ftp, mail, pop3, imap. also NTT has a
derivitive version of FreeBSD with hints at virtualization, im waiting
for our Verio to be setup now, so once it is ill peruse it a bit

On Thu, 2008-06-19 at 09:29 -0700, George Hartzell wrote:
> Sahil Tandon writes:
>  > Maxim Khitrov <mkhitrov at gmail.com> wrote:
>  > 
>  > > I'm currently with JohnCompanies. Overall, it's been a positive
>  > > experience, though I wish they offered FreeBSD 7. Beta testing for it
>  > > was supposed to begin last month, but so far no news.
>  > 
>  > +1 for JC.  The tech support and availability is unparalleled.  Satisfied 
>  > customer for over three years.
> 
> Seeing JC advertise a FreeBSD VPS product reminded me of an itch I've
> never been able to scratch.
> 
> I know about jails at the simple end, and I know about VMware at the
> complicated end, but I've never been able to figure out what technology
> underlies the VPS offerings.
> 
> I help out a friend on a Verio VPS that reports itself as FreeBSD 4.7
> w/ a kernel config file named VKERN.  There's some concept of a
> virtual root, a command named 'virtual' works a bit like sudo does for
> credentials, and there's otherwise an odd mix of "it's all my machine"
> and "it's a shared server".
> 
> Is/was there some proprietary virtualization technology in the 4.x
> days?  Is it still alive and kicking somewhere?
> 
> Anyone have any insights into how these VPS products were built?
> 
> Thanks,
> 
> g.
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