On 11/7/07, michael nt milne <michael.milne@gmail.com> wrote:
ok, so you could have two virtual machines say development and also staging which sat alongside a live production 'non virtual' instance of Zope. This would all sit on the one physical machine. The dev and staging instances would be switched off and on as required. With enough RAM and CPU would this be a realistic set-up for a service?
Yes. Here are the implications: - the hardware is your single point of complete failure - the whole machine would share its performance among native and virtual instances, so staging and development will have an impact on the production instance - if you production instance gets compromised, its not far for intruders to staging/development - the other way round (atack on zope instance, then attack on vm to reach the host) is pobably not very much harder why don't you just run 3 zope instances on the host? If its a pure zope application, then they won't interfere with each other. Although you can't upgrade zope idependently then, its in any case better resource-wise. --knitti