Every google hit for "UberPage" seems to be your writing, is there standard ZFS
terminology that would be found in ZFS documentation to what you're referring?
It's in our case the tree root of the index, which is always written after all the descendant pages have been written as a new revision is committed (during a postorder traversal of the new pages).
In ZFS the UberPage is called UberBlock. We borrowed some of the concepts as to add checksums in the parent pages instead of the pages itself. In ZFS they are blocks :-)
