Failover Mechanisms
Failover Mechanisms are essential for ensuring uninterrupted service, when a component within a redundancy system fails. These mechanisms automatically detect failures and switch to a redundant component.
Example include:
- Sever Failover: When a web server fails, a load balancer redirects traffic to a backup server.
- Database Failover: In database clusters, a primary database server failure triggers the promotion of standby server to primary role.
Redundancy | System Design
In Computer Science, redundancy means having backups or duplicates of things to make sure your computer systems keep working even if something breaks. Imagine you have important files on your computer. If you only have them in one place and your computer crashes or the files get deleted, you’ll lose everything. But if you also keep copies of those files on an external hard drive or in the cloud, that’s redundancy.
Redundancy helps prevent big problems when things go wrong. It can be applied to different parts of a computer system, like having extra computer servers, multiple copies of data, or backup internet connections. This way, if one part fails, the redundant one takes over, and everything keeps running smoothly.
Important Topics for Redundancy in System Design
- Types of Redundancies
- Understanding Active and Passive Redundancy in System Design
- Role of Load Balancing in Redundancy
- Failover Mechanisms:
- Testing and Validation
- Fault Tolerance
- Metrics
- Real-life Applications of Redundancy