A data processing system has a program module for determining a re-distribution of objects, such as database tables, over processing units of a cluster of processing units, such as in a blade computing environment. The repeater of one embodiment includes at least one modem that receives a data packet and attempts to decrypt the data packet with a first andor second encryption key. The plant stems are carried along between the pair of rollers and received in the flexible band. The first end part of the filter element comprises an axial passage configured to receive the bypass valve member slideable and sealingly. As a result of the motor being arranged outside the borehole piping and as a result of it being possible for the motor to be connected to the pump by means of torque transmitting means which extend laterally through the borehole piping, the motor can be protected from overheating, and in the event of a fault, can be pulled out of the deep borehole independently of the pump.