Red Hat Enterprise Linux 7 to Feature Btrfs
From the 'Goodbye EXT4?' files:
For the last several years, I've been asking Red Hat when Btrfs would land in Red Hat powered Linux distributions. Now I know the answer.
Tim Burke, Vice-President of Linux Engineering at Red Hat, told me that currently Btrfs is still considered to be a tech preview in the recently releases RHEL 6.3 update. He added that Red Hat is currently focusing its Btrfs efforts on RHEL 7, where the Btrfs filesytem will be a more integrated component.