2.5.6. Samba (SMB or Windows) File Serving over GFS2

As of the Red Hat Enterprise Linux 6.2 release, you can use Samba (SMB or Windows) file serving from a GFS2 file system with CTDB, which allows active/active configurations. For information on Clustered Samba configuration, see the Cluster Administration document.
Simultaneous access to the data in the Samba share from outside of Samba is not supported. There is currently no support for GFS2 cluster leases, which slows Samba file serving.