Comments on: XEN vs KVM

By: tom

tom — Wed, 15 Jul 2009 01:54:14 +0000

“the paravirtualization techniques will be outperformed with hardware” …

Uhm, No. it’s that simple. Hardware virtualization is used to allow you to trap software operations that you need to emulate. AFAIK, it doesn’t matter how good the hardware virtualization is, if it is being compared against the paravirtual guys who come along, rip out code that has to be emulated and replace it with code the co-operates with the hypervisor. Hardware virtualization is like putting a “better” suspension in your car so it can go over speed bumps faster. The paravirt guys just remove the speed bumps.

By: KING SABRI

KING SABRI — Sat, 04 Jul 2009 06:51:06 +0000

Thanks for topic ..

By: Enzo

Enzo — Thu, 26 Feb 2009 21:42:54 +0000

Oracle, Sun, Novell all use virtualization based on Xen. Amazon’s EC2 cloud uses Redhat and Xen. KVM is too immature and won’t catch up to Xen now, if it ever does.

By: W

Mon, 23 Feb 2009 07:05:53 +0000

“But one drawback [of KVM] is that it does not work on CPUs that dont have hardware virtualization support”
THis is the biggest issue for me!

By: balajirrao

balajirrao — Thu, 15 Jan 2009 05:06:09 +0000

Duh! Typo.. Fixed, thanks!

By: Bob Dog

Bob Dog — Thu, 15 Jan 2009 00:14:22 +0000

KVM is improving DAY by day.

Not “say by day”.

By: XEN - Very Popular « Brain Dump

XEN - Very Popular « Brain Dump — Tue, 08 Jul 2008 05:42:15 +0000

[...] XEN vs KVM – 112 Hits [...]

By: Dor

Dor — Thu, 26 Jun 2008 06:25:21 +0000

Xen uses qemu too so its not an issue.
Also kvm has good performance for cpu and block io but it might differ from guest to guest.

As time goes by and NPT/EPT will be widely deployed, kvm perform 90+% native performance on them.