Failover is a backup operational mode. It activates when a primary system becomes unavailable.
Key Aspects:
1. Secondary system takes over primary functions
2. Aims to minimise downtime
3. Maintains system availability
4. Often automated process
5. Critical for high-availability systems
Common Failover Scenarios:
1. Server failover
2. Database failover
3. Network failover
4. Application failover
5. Cloud service failover
Failover Systems Require:
1. Redundant hardware or systems
2. Data replication mechanisms
3. Automated switching processes
4. Regular testing and maintenance