Summary
Replication in MongoDB is a process that synchronizes data across multiple servers, providing redundancy and increased data availability. This is achieved through replica sets, a group of MongoDB servers that maintain the same dataset. Within a replica set, one node acts as the primary node, receiving all write operations, while the secondary nodes replicate the primary's operations to their datasets. This structure provides a robust system for failover and recovery. If a primary node fails, an election among the secondaries determines a new primary, allowing for continuous client operations.
Sharding in MongoDB is a method for splitting and distributing data across multiple servers or shards. Each shard is an independent replica set, and collectively, the shards make up a single logical database—the sharded cluster. This approach is used to support deployments with very large datasets and high-throughput operations, effectively addressing scalability issues...
