In this chapter, you learned about three operational aspects of MongoDB: monitoring, backup, and security.

We discussed the metrics that we should monitor in MongoDB, and how to monitor them. Following that, we discussed how to make backups and ensure that we can use them to restore our data. Finally, you learned about security with the 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 have peace of mind during operations and are safeguarded from unexpected events, such as human error and internal or external malicious users.

In the next chapter, you will learn about pluggable storage engines, a new concept that was introduced in version 3.0 of MongoDB. Pluggable storage engines allow different use cases to be served, especially in application domains that have specific and stringent requirements concerning data handling and privacy.