Replica Set High Availability
This version of the documentation is archived and no longer
supported. View the current documentation to learn how to
upgrade your version of MongoDB.
Replica sets use elections to support high availability.
- Replica Set Elections
- Elections occur when the primary becomes unavailable and the replica set members autonomously select a new primary.
- Rollbacks During Replica Set Failover
- A rollback reverts write operations on a former primary when the member rejoins the replica set after a failover.