open-source virtualization software

["Eugene Gorelik" <user=1500@nabble.blu.org>]

 I am considering different virtualization software to create isolated 
environment for Development and QA and let developers shell access to the 
virtual environments. 
I am comparing Xen and OpenVZ. They provide different level of 
virtualization and OpenVZ is like an advanced jail, but I really like it 
because it has minimal performance overhead comparing to Xen. The 
disadvantage of OpenVZ is that you can only run the same guest operating 
system as a host operation system, i.e. on Linux you can only Linux guest 
OSes (but I am only using Linux anyway) 

I'd like to hear opinions and find out what other people use for 
virtualization. Any advices and knowledge sharing will be appreciated. 

- Eugene. 

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