Book Image

Learn MongoDB 4.x

By : Doug Bierer
Book Image

Learn MongoDB 4.x

By: Doug Bierer

Overview of this book

When it comes to managing a high volume of unstructured and non-relational datasets, MongoDB is the defacto database management system (DBMS) for DBAs and data architects. This updated book includes the latest release and covers every feature in MongoDB 4.x, while helping you get hands-on with building a MongoDB database app. You’ll get to grips with MongoDB 4.x concepts such as indexes, database design, data modeling, authentication, and aggregation. As you progress, you’ll cover tasks such as performing routine operations when developing a dynamic database-driven website. Using examples, you’ll learn how to work with queries and regular database operations. The book will not only guide you through design and implementation, but also help you monitor operations to achieve optimal performance and secure your MongoDB database systems. You’ll also be introduced to advanced techniques such as aggregation, map-reduce, complex queries, and generating ad hoc financial reports on the fly. Later, the book shows you how to work with multiple collections as well as embedded arrays and documents, before finally exploring key topics such as replication, sharding, and security using practical examples. By the end of this book, you’ll be well-versed with MongoDB 4.x and be able to perform development and administrative tasks associated with this NoSQL database.
Table of Contents (22 chapters)
Section 1: Essentials
Section 2: Building a Database-Driven Web Application
Section 3: Digging Deeper
Section 4: Replication, Sharding, and Security in a Financial Environment
Working with Complex Documents Across Collections

Establishing a business rationale

By this point, you are most likely convinced that implementing your database using a replica set makes good sense. In order to justify the purchase of the extra resources required to support a replica set, however, you need to determine the following:

  • What is the cost of downtime?: A related question to ask is how much money is lost if the database goes down? Unfortunately, you cannot give a blanket answer to this question. You need to do further research to find out how much your business makes, on average, every second. This might seem like a ridiculous figure to have to calculate, but consider this: downtime is usually (hopefully!) measured in seconds. So, if your server goes down for 30 seconds, you need to know, on average, how much money is lost.

  • How important is uninterrupted service?: An often overlooked hidden cost is what is informally described as the customer irritation factor. When the database goes down or is unavailable for some reason...