Personally l would recommend KVM for very busy environment. Its more mature, stable and  better supported. Virtualbox is more feature rich but not recommended for heavy production. This is however my opinion.

This only can lead you to kind of Apple Vs Android talk - Research, find what you like and implement.

I personally use QEMU + Libvirt - not coz of anything specific, but coz I feel comfortable with it. The only reason I never went the Xen way coz of when dom0 support was removed from the Kernel, but now its back.

./Ok3ch


On Wed, Sep 25, 2013 at 9:07 AM, wa <wanangu@gmail.com> wrote:

Morning all,

 I need your thoughts on the best open source visualization tool to use considering these virtualization types:_
  • Full Virtualization
  • Hardware Assisted Virtualization
  • Operating System Virtualization
  • Paravirtualization

Thank you,

--
Walter

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