Program design considerations

Because MVS™ TCP/IP ends the connection when a server MPP completes, the client has no way of knowing that the database changes have been committed. Therefore, it is suggested that explicit-mode servers send a message to the client confirming the COMMIT before terminating. (Implicit-mode servers send the CSMOKY segment when the database changes have been committed.)
When an explicit-mode server issues a ROLB command, the client has no automatic way of knowing that the database updates have been rolled back. It is suggested, therefore, that the server send a message to the client when a rollback call completes.