Distributed System Control.

Global control in distributed systems had not been well researched. Control had only been addressed in a limited manner, such as for data-update consistency in distributed, redundant databases or for confidentiality controls access control authentication. The purpose of control is to allocate the systems resources to the most important objective. The system must manage resources during system operation. Anomalies are conditions that obstruct the system from achieving user objective. Most research had been limited to a single-processor situation however, research had to extend control to the distributed environment. The predictability of the external environment, communication delays data accuracy state information and anomalies, and stability of decision algorithms constrain global control. The integration of control, which at various levels of granularity, would enable distributed-teleconferencing, and adapt to systems conditions, was investigated.