z/OS cross-system coupling facility
HCL Workload Automation for Z uses the z/OS cross-system coupling facility (XCF) to connect HCL Workload Automation for Z systems using XCF communication links.
When one or more trackers are connected to the controller through XCF communication links, the HCL Workload Automation for Z systems form an XCF group. The systems use XCF group, monitoring, and signaling services to communicate. The controller submits work and control information to the trackers using XCF signaling services. The trackers use XCF services to transmit events back to the controller.
XCF connections let HCL Workload Automation for Z support a hot standby controller and automatic-workload-restart functions.