A coupling facility is coupled to one or more other coupling facilities via one or more peer links. The coupling of the facilities enables various functions to be supported, including the duplexing of structures of the coupling facilities. Duplexing is performed on a structure basis, and thus, a coupling...http://www.google.com.au/patents/US7940706?utm_source=gb-gplus-sharePatent US7940706 - Controlling the state of duplexing of coupling facility structures
