I'm speccing out sandbox VM servers for developers at my company. The requirements for the dom0 hosts are: local, deduplicated ZFS storage (no separate storage servers), and Xen 4.1+ (4.2 is ideal).
I checked out Oracle VM, but it only has Xen 4.0. I also looked at the Xen official list of supported dom0s, but none of the ZFS-supporting ones (openindiana/illumos and opensolaris) seem to be current enough to run Xen 4.1+.
What operating systems out there have robust (read: stable and decent performance) support for ZFS/dedup, and can smoothly (read: good hardware compatibility) work as dom0 hosts for Xen 4.1+?
If possible, I'd like to avoid compiling Xen and have a stable package, but if that's the way it has to be, I can deal with it. I'd similarly prefer ZFS support to be integrated, rather than run through one of the hack-on kernel extensions/FUSE modules available for non-Oracle Linuxes. Again, if that's not possible, I can deal.
If you care about the why: The devs need Xen 4.1 or better to do something weird I'm not clear on with CAD and passthrough, and management likes ZFS, so that's a "must have" as well. I know that dedup'd ZFS uses a load of hardware resources, but the powers that be are fine with dumping money into hardware.