[ILUG] virtualisation on linux
David De La Harpe Golden
david at harpegolden.net
Wed Feb 11 13:25:56 GMT 2009
> the other alternative i've been looking at is Xen, of course, which looks
> quite decent. i prefer the idea of full virtualisation, as opposed to para-,
> but i'm not sure how zen operates.
xen "hvm" uses hardware virtualization.
kvm is a non-xen solution that uses hardware virtualization, building
on qemu (xen hvm also reuses stuff qemu in fact, but kvm
feels like qemu down to the command line options, it just runs much
faster. kvm is not to be confused with kqemu - kqemu is a helper kernel
module which makes ordinary qemu a bit faster).
kvm is IMO rather simpler and easier to use compared to xen (virtual
machines are augmented linux processes and are managed by linux not some
strange kernel underneath, you just use normal linux command line tools
on them), but makes no attempt to support older systems without hardware
Contrary to certain FUD, kvm supports migration nowadays.
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