What is MongoDB cluster replication?
MongoDB cluster replication is a method to ensure data redundancy and high availability by duplicating data across multiple servers.
How does it work in a sharded cluster?
In a sharded cluster, each shard can have its own replica set, allowing for both horizontal scaling and data redundancy.
What are the benefits of using replication?
The benefits include improved data availability, fault tolerance, and load balancing across multiple servers.
Can I configure replication for an existing database?
Yes, you can configure replication for an existing database by converting it into a replica set.
What happens if the primary node fails?
If the primary node fails, the replica set will automatically elect a new primary from the secondaries to maintain availability.
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