CAS clustering

[Luca Scotto]

Looking at CAS 3.0.5 i found this :

/**
 * Implementation of TicketRegistry that uses two EhCaches (one for
 * TicketGrantingTickets and one for ServiceTickets). Properly configured, this
 * TicketRegistry can support distributed ticket registries.
 *
 * @author Scott Battaglia
 * @version $Revision: 1.2 $ $Date: 2006/06/01 19:32:01 $
 * @since 3.0.5
 */
public final class EhCacheTicketRegistry

Can i use this for clustering?
if (true) {
    How can i use this for clustering CAS?
}

Thanks