It is one of the most outstanding novelties of Ubuntu 19.10, but perhaps it is not being talked about as much because Canonical has not had time to implement it 100% in the version that will be released in two days. ZFS as root It will make its appearance in Eoan Ermine, but it will do so with the more advanced features disabled. The company that runs Mark Shuttleworth does not recommend using the option on production equipment, but those who do can take advantage of a few things.
As on other occasions, it has been Ubuntu Budgie s Twitter who has released the news. The last to arrive in the Ubuntu family is a mine of information and a few hours ago he published a first tweet in which he tells us about the novelty and another in which he tells us that creating and recovering control points in Eoan Ermine is very fast . In the second tweet you also told us what command you used to create / retrieve the checkpoint.
ZFS as root allows us to create checkpoints
Trying to create checkpoints and recall them - lightning fast! And it all feels so instantaneous.
sudo zfs snapshot rpool / USERDATA / dad_0uvb3h @ Oct2019
sudo zfs rollback rpool / USERDATA / dad_0uvb3h @ oct2019
Seeing that he had provided the commands and that there is not much information about it, the question was forced: will it be more automatic in Ubuntu 20.04? His answer was that he "should", but that Canonical to publish a blog post talking about ZFS after the release of Ubuntu 19.10, that is, as of Thursday October 17th.
We can understand that, one of two, or Canonical adds a graphical tool to create the control points manually, which would not be "automatic", or, most likely, the control points will be created automatically as in Windows. If you were to ask me what I think they will implement, I would say both.
In any case, I think it is important to underline the word "Experimental" and that Canonical does not recommend its use in production equipment, so we will have to be patient and in Ubuntu 20.04 FAnimal FAnimal we will be able to enjoy ZFS as root 100%.
In the understanding that one of the factors that differentiated UNIX from Linux, was the Security in the File System, it will no longer be valid. Let's say that for Small and Medium Applications it no longer makes sense to "battle with UNIX" if we can now work with an OS as friendly as Linux.