On Tue, 18 Sep 2007, Flaherty, Patrick wrote:
If I had the time, I'd like to try using Xen with an OpenSolaris ZFS iSCSI target as shared storage, but alas I do not have that time.
FWIW, I've had good luck compiling and running the iSCSI target from http://iscsitarget.sourceforge.net/ on CentOS 5. There aren't all the bells and whistles of ZFS, I suppose, but it's pretty simple to set up. Also, given gigabit ethernet and a decent switch, its bonnie++ numbers aren't bad at all.