# MongoDB
MongoDB is a document database, which means it stores data in JSON-like documents.
In Shine we have MongoDB replica sets with authentications using docker.
### Replica set
A replica set in MongoDB is a group of [`mongod`](https://docs.mongodb.com/manual/reference/program/mongod/#bin.mongod) processes that maintain the same data set. Replica sets provide redundancy and [high availability](https://docs.mongodb.com/manual/reference/glossary/#term-high-availability), and are the basis for all production deployments.
## Replica set architecture with docker
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