ZFS Licensing Issues
Canonical announced that support for the ZFS (Z File System) will be available in Ubuntu 16.04 LTS, but a lot of users have been asking about a possible license conflict. Canonical’s Dustin Kirkland explained why that’s not a problem.
ZFS (Z File System) is described as a combination of a volume manager (like LVM) and a filesystem (like ext4, xfs, or btrfs), and it’s licensed under CDDL (Common Development and Distribution License). Don’t worry if you didn’t hear about it. It’s not something that’s commonly used.
We at Canonical have conducted a legal review, including discussion with the industry's leading software freedom legal counsel, of the licenses that apply to the Linux kernel and to ZFS.
And in doing so, we have concluded that we are acting within the rights granted and in compliance with their terms of both of those licenses.