I will tell you two things about RHCK compatibility. First, Oracle's RHCK worked properly with the ZFS source code when I wrote this, and I'm assuming that it

I will tell you two things about RHCK compatibility. First, Oracle's RHCK worked properly with the ZFS source code when I wrote this, and I'm assuming that it was built for Red Hat: https://www.linuxjournal.com/content/zfs-linux https://www.linuxjournal.com/content/zfs-linux Second, it would likely be possible to run the CentOS kernel on Oracle Linux. My research for Btrfs ran the other way, but I was able to get both the latest Fedora and Oracle UEK kernels working on CentOS with various levels of Btrfs support. https://www.linuxjournal.com/content/btrfs-centos-living-loopback https://www.linuxjournal.com/content/btrfs-centos-living-loo... I don't think it's necessary to use an Oracle-supplied kernel package on Oracle linux; kernel packages from other distributions would likely work.