Book Image

Mastering MongoDB 6.x - Third Edition

By : Alex Giamas
Book Image

Mastering MongoDB 6.x - Third Edition

By: Alex Giamas

Overview of this book

MongoDB is a leading non-relational database. This book covers all the major features of MongoDB including the latest version 6. MongoDB 6.x adds many new features and expands on existing ones such as aggregation, indexing, replication, sharding and MongoDB Atlas tools. Some of the MongoDB Atlas tools that you will master include Atlas dedicated clusters and Serverless, Atlas Search, Charts, Realm Application Services/Sync, Compass, Cloud Manager and Data Lake. By getting hands-on working with code using realistic use cases, you will master the art of modeling, shaping and querying your data and become the MongoDB oracle for the business. You will focus on broadly used and niche areas such as optimizing queries, configuring large-scale clusters, configuring your cluster for high performance and availability and many more. Later, you will become proficient in auditing, monitoring, and securing your clusters using a structured and organized approach. By the end of this book, you will have grasped all the practical understanding needed to design, develop, administer and scale MongoDB-based database applications both on premises and on the cloud.
Table of Contents (22 chapters)
1
Part 1 – Basic MongoDB – Design Goals and Architecture
4
Part 2 – Querying Effectively
11
Part 3 – Administration and Data Management
16
Part 4 – Scaling and High Availability

Replica set administration

The administration of a replica set can be significantly more complex than what is needed for single-server deployments. In this section, instead of trying to exhaustively cover all of the different cases, we will focus on some of the most common administrative tasks that we will have to perform and how to do them.

How to perform maintenance on replica sets

If we have some maintenance tasks that we have to perform in every member in a replica set, we always start with the secondaries. We perform maintenance by performing the following steps:

  1. First, we connect to one of the secondaries via the mongo shell. Then, we stop that secondary as follows:
    > use admin
    > db.shutdownServer()
  2. Then, using the same user that was connected to the mongo shell in the preceding step, we restart the mongo server as a standalone server in a different port as follows:
    > mongod --port 95658 --dbpath <wherever our mongoDB data resides in this host...