Virtualization versus jails

[Dag-Erling Smørgrav]

Oliver Fromme <olli at lurza.secnetix.de> writes:
> Jails don't give you a perfect separation.  Jails still run under the
> same kernel as the host system, and if there's a bug somewhere, you're
> out of luck.  You can also run into various kinds of resource
> starvation with jails, i.e. jails can use up shared resources.  All of
> that isn't possible (or at least to a much smaller degree) with
> virtualization solutions (xen, qemu, vmware, whatever), because they
> run the guest systems in a virtual machine with their own kernel and
> resources.

In addition, numerous system features are not available or do not work
properly in jails.  You can't run a DHCP server in a jail, nor can you
easily run multiple PostgreSQL servers in separate jails on the same
machine.

DES
-- 
Dag-Erling Smørgrav - des at des.no