Originally posted by n3wu53r
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Intel Haswell Linux Virtualization: KVM vs. Xen vs. VirtualBox
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Originally posted by AdamW View PostI use a KVM for exactly that and it's fine. But I don't do any 3D stuff: if you do 3D stuff and you need passthrough acceleration VBox is really the only option you have ATM. (FWIW, the Fedora kernel and virt devs are unified in viewing VBox as a terrible, terrible piece of software; they obviously think KVM is the best thing ever, but it's not just competition-syndrome, they think VMware and Xen are perfectly fine code, it's just VBox they think is really terrible).
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Originally posted by n3wu53r View PostSo If I wanted to run a virtualized instance of Windows for windows-only software, what would be the best idea? I'm thinking vmware workstation, but I'm worried since fedora updates their kernels semi-frequently and things might break with the modules and I'll really need this machine to be reliable.
Then again I could just put off updating the kernel for a bit until vmware has an update. Or even use a 3rd party patch.
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Originally posted by benmoran View PostThese benchmark results are exactly what I expected. These days KVM performs damn well, and I use it for just about everything. We used to use Xen a lot in the lab, but many times over the years I've had issues when running newer guests. KVM has always worked well, and has picked up a ton of nice features recently.
KVM also has snappshotting, provided your using the right disk image (such as qcow2). Snapshotting is not yet available in the Virt-Manager GUI, which I'm guessing most people would use. Doing a snapshot via virsh is dead simple though.
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These benchmark results are exactly what I expected. These days KVM performs damn well, and I use it for just about everything. We used to use Xen a lot in the lab, but many times over the years I've had issues when running newer guests. KVM has always worked well, and has picked up a ton of nice features recently.
KVM also has snappshotting, provided your using the right disk image (such as qcow2). Snapshotting is not yet available in the Virt-Manager GUI, which I'm guessing most people would use. Doing a snapshot via virsh is dead simple though.
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Originally posted by n3wu53r View PostSo If I wanted to run a virtualized instance of Windows for windows-only software, what would be the best idea? I'm thinking vmware workstation, but I'm worried since fedora updates their kernels semi-frequently and things might break with the modules and I'll really need this machine to be reliable.
Then again I could just put off updating the kernel for a bit until vmware has an update. Or even use a 3rd party patch.
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Originally posted by ownagefool View PostXen and KVM are bare metal hypervisors, where virtual box is a hosted hypervisor. Doing your virtualization at application level is always going to be slower than at kernel level unless somethings really wrong.
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Originally posted by garegin View Postnot only that. they are paravirtualization. the hardware doesn't have to be fully emulated. that's why I can run two guests on KVM or Hyper-V and the processor and the hard drive are not going crazy.
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Originally posted by LasseKongo View PostThat is partly true, only Xen can run full PV guests. In the benchmarks the Xen guest is installed as a HVM machine using PV drivers, similar to KVM. It would be interesting to see i a real PV guest installation in Xen would make a difference. My personal experience is that real PV guests are snappier, but I know they suffer in some benchmarks.
Even more interesting would be to see tests on the upcoming PVHVM mode in Xen 4.3 [URL="http://wiki.xen.org/wiki/Xen_Overview#PV_in_an_HVM_Container_.28PVH.29_-_New_in_Xen_4.3"]
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Originally posted by garegin View Postnot only that. they are paravirtualization. the hardware doesn't have to be fully emulated. that's why I can run two guests on KVM or Hyper-V and the processor and the hard drive are not going crazy.
Even more interesting would be to see tests on the upcoming PVHVM mode in Xen 4.3 [URL="http://wiki.xen.org/wiki/Xen_Overview#PV_in_an_HVM_Container_.28PVH.29_-_New_in_Xen_4.3"]
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