RWTH Aachen University
One possible technique of data processing is its transformation into a data stream and the execution of particular operations on the data tuples. These operations can be usually processed concurrently especially when the plan of operations is branched. Therefore, this way of data processing is suitable for evaluation in parallel environment. On the other hand, the ordering of the execution of tasks associated with the operations is closely related to the utilization of the hardware components. For that reason, the task scheduler is very important in these systems.