The average downtime contribution by any component is calculated by amortizing the MTTR time over the MTBF period. A more complex model for the component, which considers partial outages, requires the use of statistical methods to calculate availability. To achieve higher reliability or to compensate for less reliable components, redundancy is used. Having a backup for a component that fails keeps the system operating. Availability of redundant configurations is calculated based on the time to detect and switch over to the redundant component.
Fault management becomes a critical factor in system design.
Fault Tolerance versus High Availability 2. Redundant Configurations 3. Fault Management Process 4. High Availability and Restart Models 5. Fault Management Software for Redundant Systems 6.