MongoDB Replica Set
MongoDB is a document-oriented NoSQL database that stores JSON-like BSON records and scales horizontally through sharding; a replica set is its built-in mechanism for replicating data across nodes and automatically electing a new primary on failover.
Baseline topologies
| Topology | Minimum nodes | Roles |
|---|---|---|
| replica-set | 3 | data-bearing |
What drives the cost
- Replica set members
- Total members in the replica set, including primary and secondaries.
- Data-bearing copies
- Number of data-bearing copies you want for quorum-safe redundancy.
- Logical dataset size (GB)
- Current logical data volume before replication, backups, and growth headroom.
Where it runs
bare_metal, dedicated, cloud_vm
Size MongoDB Replica Set and get a cost estimate