"There is no plan to include ZFS in Oracle Linux. "

Posted Feb 26, 2016 19:05 UTC (Fri) by atai (subscriber, #10977)
Parent article: SFC: GPL Violations Related to Combining ZFS and Linux

Oracle's own position:

https://blogs.oracle.com/linux/entry/oracle_linux_7_is_now

There is no plan to include ZFS in Oracle Linux. The Oracle Linux 7 installer allows you to select either XFS (the default) or btrfs. If you're familiar with ZFS, I recommend taking btrfs on Oracle Linux 7 for a spin.