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Re:Ask HN: Which VPS hosting do you use? by rublind on Sunday March 20, 2011 @10:10AM (#2346297)
Do you guys have any preference for hardware or software virtualization? (i.e. xen vs. openvz)
Re:Ask HN: Which VPS hosting do you use? by migrantgeek on Sunday March 20, 2011 @11:41AM (#2346486)
Xen.

OpenVZ and Virtuozzo are more like chroot on steroids. Those technologies make it easier to oversell hardware and you'll often end up with some pretty crappy performance.