A Simulation Study of a Reconfigurable Database

The effect of supervisory control on a redundant database unit representing a command and control (C2) system that supports air operations is investigated through simulation. Several supervisory control policies are considered. They authorize restoration and/or routing upon the failure of a server in the system. The performance of the modeled system under these policies is evaluated based on the measures of system mean-time-to-failure (MTTF), steady-state availability, expected response time, and overhead. The system is modeled as a discrete event system using a simulation tool. In addition, a system update process is implemented to ensure the currency of the information contained in the database unit.