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The DreagonFly BSD kernel was designed from the beginning to be able to run as a process on itself with little overhead:
http://leaf.dragonflybsd.org/cgi/web-man/?command=vkernel§ion=A...
I think think this is the closest you can get to easy, lightweight virtualization.
I'm not sure it will be very useful without fine grained resource controls (cpu/mem/swap) such as those Solaris zones have. In this state it seems to be just another security tool. But it's not much of a security improvement, if you allow users or processes in a container to exhaust e.g. cpu resources used by all containers in the system.
How does this compare to Linux-VServer? And to Virtuozzo, by extension. They seem to be the same, the ability to run multiple userlands on a single kernel. Similar to FreeBSD jails or Solaris zones.
So, is this new method better, worse, the same, or just different from Linux-VServer?



