At least one node in the cluster must support the Windows services role. This role provides two Windows services: Workflow Manager and Task Manager.
Workflow Manager is responsible for executing server jobs generated by the undertaking of activities in the RPI client application – for example, the testing of an audience or execution of an interaction workflow.
Task Manager is responsible for the execution of asynchronous server-side jobs (e.g. catalog synchronization or generation of a selection rule waterfall report).
Note that, when multiple nodes expose the Windows services role, the node to be assigned the responsibility for executing a server job will be determined by the Master node manager (the job will be assigned to the Windows services node with the fewest executing server jobs).