Optimal Control Method For Runtime System Maintenance

Long-running software systems are suffering performance degradation due to steady accumulation of error conditions in the internal state and the external operating environment of the runtime system. To solve this problem, a proactive and preventive maintenance method called software rejuvenation has been proposed. Aiming at the long-running system, we put forward an optimal maintenance control method, by which software system is rejuvenated prior to system failure to achieve high availability and low maintenance cost. First we formulate the optimization method and obtain the system cost rate function. Then the optimal rejuvenation interval is derived to minimize the cost rate, and the boundary condition of our maintenance method is achieved based on its closed-form solution. Finally, the Experiment results demonstrate the effectiveness of the proposed method.