3 thoughts on - Hey

• I’ve used both Xen and KVM and at least in benchmarks of applications I
  did here I didn’t see much difference and since KVM is natively supported by RedHat, that’s what I’ve been using.

  Obviously on this list there is mostly Xen users, and I feel like I must be missing some great advantage so I am curious, those of you who prefer Xen, why?

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• I have used xen over kvm and others for a while. It was what I just started using first years ago. With Xen I could manage domains and my system seemed like a real server. KVM just seemed like a command line trick to me. (I know it is not especially since its integration into the kernel.)

  xenserver is pretty sweet and there are some big products built around it. Citrix loves it too. OpenStack is neat:
  http://www.xenproject.org/presentations-and-videos/video/xpus13-rackspace.html

  I was disappointed when redhat dropped xen :/ I mean now there is an entire project around keeping xen on CentOS, etc. This one…..

  In the end xen just seemed more strait forward.

• I used to use Xen. As far as I can tell, I published the first SRPM’s for it, back when it was open entirely open source, before Citrix bought it. As far as I can tell, the open source Xen suffers from many of the same problems as KVM and qemu. Namely, the gui and command line tool, “libvirt”, is poorly built overburdened debris that does not fulfill *anyone’s* standards of a good configuration tool, especially the open source GUI guidelines written by Eric Raymond in his “Luxury of Ignorance” essay.

  That said, Xen suffers no more from it than KVM does. It also doesn’t have the stunningly painful requirements to override NetworkManager and manually configure the bridge device, as documented by me years ago at at https://wikis.uit.tufts.edu/confluence/display/TUSKpub/Configure+Pair+Bonding+and+Bridges+for+KVM+Hypervisor.

  Personally, I use Virtualbox or corporate supplied VMware these days. Not becuase I don’t like open source tools, but because I prefer to spend my subtle confifation time more usefully than working through libvirt and NetworkManager manual, poorly documented, unintegrated confuiguration steps just to get things to work normally.