In this chapter, you learned how to enable the sharding feature for a MongoDB database. First of all, we prepared the environment and configured the hostnames for configuration servers. Then, you learned how to start a configuration server and establish a configuration server on a machine. You are recommended to host the configuration server on separate machines in a production environment, but for development, you can host them on a single machine.

After establishing the configuration servers, we added shards to sharding. For production uses, it's better to use a replica set for each shard, but for development and testing environments, we can host standalone mongod instances. For our example, we added two shards, one replica set, and a standalone mongod instance.

Also, you learned how to manage and control mongos instances using the mongo shell.

At the end, we created a database and collection to test the sharding feature on. You learned that we should enable sharding for the database...