Don't forget VxFS, a very nice and manageable filesystem. Put it with VxVM and you've got alot of the OnTap 7 aggregate/flexvol stuff already there for you.
Not standard in solaris, as far as I am aware. (correct me if I am wrong).
Correct.
And you get some of the features of WAFL, but not others. And the ones you do get are implemented entirely differently, which has some impacts such as performance.
It appears from first glance that ZFS has nearly all the features of WAFL, at least conceptually if not in practice. Are they using netapp patents I wonder?
Certainly the concepts of how snapshots are managed and write aggregation/localization are similar. I think I've seen Sun engineers refer to the WAFL white paper in discussions on the technology.
The source for ZFS has been downloadable for a couple of months now at least. I'd assume Netapp has had a chance to look at it if they wanted to.