- In MongoDB the document-oriented data model makes it easier to split data across multiple servers.
- Loading and Balancing data across a cluster is done by MongoDB.
- Then it is automatically redistributing the documents.
- It will be providing an interface between client applications and the sharded cluster, so the mongos act as a query router.
- Config servers store metadata and configuration settings for the cluster.
- To manage distributed locks MongoDB uses the config server.
- In MongoDB each sharded cluster must have its own config servers.
