Book Image

Mastering MongoDB 3.x

By : Alex Giamas
Book Image

Mastering MongoDB 3.x

By: Alex Giamas

Overview of this book

MongoDB has grown to become the de facto NoSQL database with millions of users—from small startups to Fortune 500 companies. Addressing the limitations of SQL schema-based databases, MongoDB pioneered a shift of focus for DevOps and offered sharding and replication maintainable by DevOps teams. The book is based on MongoDB 3.x and covers topics ranging from database querying using the shell, built in drivers, and popular ODM mappers to more advanced topics such as sharding, high availability, and integration with big data sources. You will get an overview of MongoDB and how to play to its strengths, with relevant use cases. After that, you will learn how to query MongoDB effectively and make use of indexes as much as possible. The next part deals with the administration of MongoDB installations on-premise or in the cloud. We deal with database internals in the next section, explaining storage systems and how they can affect performance. The last section of this book deals with replication and MongoDB scaling, along with integration with heterogeneous data sources. By the end this book, you will be equipped with all the required industry skills and knowledge to become a certified MongoDB developer and administrator.
Table of Contents (13 chapters)

CRUD using the shell

The mongo shell is equivalent to the administration console used by relational databases. Connecting to the mongo shell is as easy as typing the following:

$ mongo

Type it on the command line for standalone servers or replica sets. Inside the shell, we can view available databases simply by typing the following:

$ db

And connect to a database by typing the following:

> use <database_name>

The mongo shell can be used for querying and updating data in our databases. Finding documents from a collection named books is as easy as the following:

> db.books.find()
{ "_id" : ObjectId("592033f6141daf984112d07c"), "title" : "mastering mongoDB", "isbn" : "101" }

And inserting this document in the books collection can be done via the following:

> db.books.insert({title: 'mastering mongoDB&apos...