Re: [SAGE] JAILS (Re: Respondents needed for article on sysadmin survival)

[Philip Brown <phil@bolthole.com>]

On Sat, Jan 17, 2004 at 02:58:30PM -0600, Dustin Puryear wrote:
> > On Fri, Jan 16, 2004 at 12:07:06PM -0600, Dustin Puryear wrote:
> > > ...
> > > It's the same idea as VMware. You build a virtual machine and move it
> > around
> > > as needed instead of building "the machine".
> > 
> > ???
> > 
> > you still have to essentially build out duplicate a "new" copy of the OS
> > to run inside the virtual machine, one way or another.
> > You only "save" on hardware setup.
> 
> True and false.
> 
> # mkdir /jails/mail.example.com


I was referring to VMware, not jails. In other words, I was trying to point
out the difference between vmware, and jails.
You explicitly get to share certain components of the OS, with jails/zones.
Whereas with VMware, they all run completely separately.

That can be a win, or that can be a loss, depending on what your goals are,
and how much you want to trust the jail.
(and whether you want to run the SAME OS, or a slightly different
 version, across instances)