Forum OpenACS Q&A: UML vs. VServer (like FreeBSD Jail)

Posted by Andrew Piskorski on
I don't see why you would want to use User Mode Linux for OpenACS hosting. Yes, it should work, but you're running an entirely separate Linux kernel for every virtual server. Unless you really need custom kernels for each customer - extremely unlikely - that's massive overkill, and I assume performance would suck because of it.

Acorn Hosting uses the Linux VServer kernel patches instead, which is basically the exact same idea as FreeBSD's jail facility. All virtual servers share one kernel, but everything else is virtualized. Should be significantly faster than UML.

This stuff has been discussed here previously, at least in June 2003 and Oct. 2001.