Abstract: A user can authenticate with multiple factors to a security appliance and establish an authenticated connection with a TN3270 client to a TN3270 server on a first mainframe via the security appliance as a proxy. The security appliance records the port number of the proxied connection and associates the port number with the user identifier, as well as an indication that MFA was performed successfully. After an SNA session is established with a second mainframe that hosts the SNA application to be accessed, a security macro can resolve a logical unit name of the TN3270 client to the IP address of the security appliance and port number of the proxied connection. The second mainframe can send a request via a web interface to the IP address for verification that the MFA requirement was satisfied for the user identifier associated with the SNA session.

Abstract: A message processing facility provides a send function for sending messages to designated locations. The facility allows a default target for a message, initiates parallel execution, adds additional processes to an already parallel execution, determines that a problem has completed and performs the appropriate completion actions. The message processing facility enables coordination of the results of a network that has been widened in its parallelism, without creating subproblems. Processes within the parallel network do not need to be aware of the topology or the position of a given process within the topology. The width of the parallelism involved in a particular request is tracked, and therefore, the appropriate number of results expected can be determined automatically and dynamically. Therefore, despite dynamic changes in topology, completion can be determined without awareness of the processes that create the results.

Abstract: A message processing facility provides a send function for sending messages to designated locations. The facility allows a default target for a message, initiates parallel execution, adds additional processes to an already parallel execution, determines that a problem has completed and performs the appropriate completion actions. The message processing facility enables coordination of the results of a network that has been widened in its parallelism, without creating subproblems. Processes within the parallel network do not need to be aware of the topology or the position of a given process within the topology. The width of the parallelism involved in a particular request is tracked, and therefore, the appropriate number of results expected can be determined automatically and dynamically. Therefore, despite dynamic changes in topology, completion can be determined without awareness of the processes that create the results.

Abstract: A method and apparatus for serializing a request for access to a resource originating from a requester in a system of a multisystem complex. Each system of the complex maintains local contention data indicating contention between requesters on that system for access to the resource, as well as a local contention summary summarizing the local contention data. A global manager for managing contention between the systems uses the local contention summaries to determine the existence of global contention for the resource. In response to a request for access to the resource originating from a requester on a system, the system determines whether the request requires an update of the local contention summary for the system. If the request does not require an update of the local contention summary, the system processes the request in accordance with the local contention data for the system.