Qube is built around the client/server concept. This means the system is controlled by a central server daemon, called the Supervisor which can dispatch jobs to each of its clients. (In the case of Windows, the Supervisor is handled by a service.)
Consequently, the Supervisor is responsible for all functions involving the submission, dispatch, monitor, and control of jobs in the system. It is also responsible for monitoring the operating health and status of the various execution hosts in the system. The daemons running on these hosts are called Workers.