The File Systems section provides information on the file system structure and maintenance, the Btrfs Technology Preview, and file systems that Red Hat fully supports: ext3, ext4, GFS2, XFS, NFS, and FS-Cache.
Btrfs is available as a Technology Preview feature in Red Hat Enterprise Linux 7 but has been deprecated since the Red Hat Enterprise Linux 7.4 release. It will be removed in a future major release of Red Hat Enterprise Linux.
XFS is the default file system in Red Hat Enterprise Linux 7 and Red Hat, and Red Hat recommends you to use XFS unless you have a strong reason to use another file system. For general information on common file systems and their properties, see the following Red Hat Knowledgebase article: How to Choose your Red Hat Enterprise Linux File System