Hot backup lossless control method, computing processing device and computer program product

The invention provides a hot backup lossless control method and a discharge circuit, and relates to the technical field of power supplies. And according to the power supply state of the main power supply unit, controlling the working state of the boost module and the discharge circuit output state of the first backup power supply unit. Or according to the respective power supply states of the main power supply unit and the second backup power supply unit, the discharge circuit output state of the second backup power supply unit is controlled, and the voltage output by the discharge circuit of the second backup power supply unit is controlled to be lower than the voltage provided by the main power supply unit during the normal power supply period of the main power supply unit. The high voltage of the boost module is used for supplying power to the step-down module, the loss of the step-down module is not provided by the electric energy generated by the BBU any more, and the service life of the BBU is not sacri