Summary
In this chapter, we learned about the foundations of indexing and index internals. We then explored how to use the different index types available in MongoDB, such as single-field, compound, and multikey, as well as some special types, such as text, hashed, TTL, partial, parse, unique, case-insensitive, and geospatial.
In the next part of the chapter, we learned how to build and manage indexes using the shell, which is a basic part of administration and database management, even for NoSQL databases. Finally, we discussed how to improve our indexes at a high level, and also how we can use index intersection in practice to consolidate the number of indexes.
In the next chapter, we will discuss how we can monitor our MongoDB cluster and keep consistent backups. We will also learn how to handle security in MongoDB.