https://stratis-storage.github.io/
I really wish we had HAMMER on Linux.
Check their FAQ here: https://stratis-storage.github.io/faq/
In short:
In terms of its design, Stratis is very different from ZFS/BTRFS, since they are both in-kernel filesystems. Stratis is a userspace daemon that configures and monitors existing components from Linux’s device-mapper subsystem, as well as the XFS filesystem.
Red Hat move seems very strange here because it would be better just to hire several BTRFS developers and join the BTRFS Linux ecosystem instead of writing something new ... I still do not know what for ...
I found this previous discussion rather enlightening on the subject:
The open stratis question for me is, with so many layers it depends on, how are bugs going to get handled? And how fail safe will it really be when there are problems? And what do repairs entail, and how long do they take on large volumes? What sorts of goofy unexpected edge cases will users run into, and how long will it take to find workarounds and permanent fixes? Is it really offering both the general Linux community, including even Fedora in particular, something they'll really want? And I don't know the answer to any of that. I have no idea if it'll see widespread adoption like LVM has.