AVAILABILITY FACTOR OF DATA PROCESSING SYSTEM WITH PRIMARY AND BACKUP NODES
This paper deals with dual-node fault-tolerant data processing systems, which are widely used as high-reliable data processing systems and have acceptable overhead expenses in hardware implementation. Simplified reliability model for duplex systems and advanced model for data processing systems with primary and backup nodes based on three-state model of recoverable elements, which takes into consideration finite time of node activation and different failure rates of active and passive nodes, are also observed in this paper. Mathematical solution of reliability model, calculation formula for availability factor of data processing system with primary and backup nodes and calculation examples are also provided.