Summary

This chapter finishes off the MongoDB introduction with some more advanced concepts. You’ve learned how to define different types of indexes to improve the speed for queries. You’ve also learned how to deploy a MongoDB replica set—with a read/write master and read-only replicas—to ensure high availability and improve read performance.

This chapter introduces the concept of partitioning data from extremely large collections into shards that exist on separate partitions to allow your implementation to scale horizontally. You’ve learned about the Grid and GridStore objects included with the MongoDB Node.js driver that allow you to interact with MongoDB’s GridFS system to store extremely large files.

You’ve also looked at different backup strategies and options to protect the most critical data in your MongoDB databases.