The allocation of a structure in a coupling facility depends on several factors — application requirements, installation requirements, and availability of coupling facility storage. The application request to allocate a coupling facility structure (through the IXLCONN macro) may rely on the installation's specifications for the coupling facility's use as defined in the active coupling facility resource management (CFRM) policy. (An authorized application can query the CFRM policy by using the IXCQUERY macro.) The application's request for structure allocation, combined with the coupling facility control code's storage utilization requirements, ultimately determine if, where, and how large a structure is allocated.