Abstract: A computer-implemented method for asynchronous duplexing between two computing devices includes obtaining a task for execution by a first computing device and executing the task. A first computing task completion identifier is assigned upon execution of the task. The task with the assigned first computing task completion identifier is transferred to a second computing device and executed. A second computing task completion identifier is assigned upon execution of the task. The first computing task completion identifier and the second computing task identifier are logged into a task management log for facilitating the recovery of the first computing device by comparing the first computing task completion identifier and the second computing task identifier for identifying tasks executed by the first computing device and requiring execution by the second computing device.

Abstract: A computer-implemented method for asynchronous duplexing between two computing devices includes obtaining a task for execution by a first computing device and executing the task. A first computing task completion identifier is assigned upon execution of the task. The task with the assigned first computing task completion identifier is transferred to a second computing device and executed. A second computing task completion identifier is assigned upon execution of the task. The first computing task completion identifier and the second computing task identifier are logged into a task management log for facilitating the recovery of the first computing device by comparing the first computing task completion identifier and the second computing task identifier for identifying tasks executed by the first computing device and requiring execution by the second computing device.

Abstract: System-managed duplexing of coupling facility structures. A plurality of instances of coupling facility structures are maintained in a plurality of coupling facilities. Duplexing processing associated with the plurality of instances is managed by one or more operating systems, making many of the steps associated with duplexing transparent to the exploiters of the coupling facility structures. System-managed duplexing provides high availability for coupling facility structure data via a robust recovery mechanism (i.e., duplexing failover).

Abstract: System-managed duplexing of coupling facility structures. A plurality of instances of coupling facility structures are maintained in a plurality of coupling facilities. Duplexing processing associated with the plurality of instances is managed by one or more operating systems, making many of the steps associated with duplexing transparent to the exploiters of the coupling facility structures. System-managed duplexing provides high availability for coupling facility structure data via a robust recovery mechanism (i.e., duplexing failover).

Abstract: System-managed duplexing of coupling facility structures. A plurality of instances of coupling facility structures are maintained in a plurality of coupling facilities. Duplexing processing associated with the plurality of instances is managed by one or more operating systems, making many of the steps associated with duplexing transparent to the exploiters of the coupling facility structures. System-managed duplexing provides high availability for coupling facility structure data via a robust recovery mechanism (i.e., duplexing failover).

Abstract: System-managed duplexing of coupling facility structures. A plurality of instances of coupling facility structures are maintained in a plurality of coupling facilities. Duplexing processing associated with the plurality of instances is managed by one or more operating systems, making many of the steps associated with duplexing transparent to the exploiters of the coupling facility structures. System-managed duplexing provides high availability for coupling facility structure data via a robust recovery mechanism (i.e., duplexing failover).