btrfs root filesystem
The release notes for OL6.3 indicate that its possible to create a btrfs root filesystem on install using the alternative boot ISO media (excerpt from release notes at https://oss.oracle.com/ol6/docs/RELEASE-NOTES-U3-en.html):
Note: The standard installation media does not have support for creating a btrfs root filesystem on initial install. If you want to install Oracle Linux 6 Update 3 and use btrfs as your root filesystem, please use the alternative boot ISO media which uses btrfs as the default root filesystem. Using the boot.iso requires that the full installation source be available via a network method, i.e. FTP, HTTP or NFS.
However I still don't see how to do this. Just as with the full DVD install there isn't an option to use btrfs when laying out the fileystem in the installer. Anyone know how to do this?