Tasks, Commands, and Actions

Tasks, commands, and actions are used to abstract the activities within the INTERSECT ecosystem. Fig. 25 shows their relationships. The definitions of these activities are as follows:

Action: An action is a specific activity.
Command: A command contains one or more actions.
Task: A task contains one or more commands. A task forms a graph of commands and their actions, which are performed in series or parallel. The graph can be cyclic.

Abstract example of task, command and action relationship — Fig. 25 An abstract example of the relationship of task, command and action

Fig. 26 gives a more concrete example. The task ‘Analyze Data’ contains the command` ‘Execute MPI Program’, which in turn contains the action ‘jsrun’. This example also shows how the action for a command can be different between different infrastructure systems. In this case the action is ‘jsrun’ on System A and ‘mpirun’ on System B.

Concrete example of task, command and action relationship — Fig. 26 A concrete example of the relationship of task, command and action