In this chapter, we learned about three operational aspects of MongoDB, namely monitoring, backups, and security.

We discussed the metrics that we should monitor in MongoDB and how to monitor them. Following that, we discussed how to take backups and make sure that we can use them to restore our data. Finally, we learned about security with authentication and authorization concepts as well as network level security and how to audit it.

As important as it is to design, build, and extend our application as needed, it is equally important to make sure that we can have peace of mind during operations and are safeguarded from unexpected events, that being human error or malicious users, internal and external.

In the next chapter, we will learn about pluggable storage engines, a new concept that was introduced in v3.0 of MongoDB. Pluggable storage engines allow for different use cases to be served, especially in application domains that have specific and stringent requirements around data handling and privacy.