I don't care about GUI or tools, but I do care about stability and performance. If I'm running a FreeBSD firewall and a Opensolaris file server as guests, will I get better stability or performance (network and disk i/o) if I switch to KVM? Follow-up question: which is most likely to be rock-stable and near-native i/o speeds in the future?
Currently I have a xen server with an OpenSuse dom0 and several domUs including *NIX and *BSD.
Problems I currently have with the latest xen as of ~August:
- Networking in PV kernels buggy: can't change MAC of vif in dom0, packets get lost if using a domU as a firewall
- FreeBSD 8.1 not stable as a PV domU
- HVM domUs not stable under heavy I/O load
Supposedly the networking bug in the PV kernels is fixed, so I'm looking to switch distros to one that uses pv kernels. I figured that if I'm going to redo Xen from scratch, might as well look at the competition and KVM seems somewhat promising.
EDIT: I don't care about GUI/management tools as I only use command-line options.