Software → System Design
Redundancy
Duplicating components or data so the system can continue working when part of it fails.
Motivation
Redundancy adds extra capacity or copies so failure does not immediately become outage. It solves the problem of single points of failure.
Mental model
Redundancy is backup capability before you need it.
Where it fits
Redundancy belongs to the Software track, inside System Design. It connects to nearby concepts through the graph relationships on this page and in the graph explorer.
Common mistakes
- Adding redundant parts that fail the same way.
- Forgetting to test failover.
- Assuming redundancy alone guarantees reliability.
Related concepts
Use the metadata panel or return to the graph to explore concepts that this one requires or relates to.