Book Image

MongoDB Administrator???s Guide

By : Cyrus Dasadia
Book Image

MongoDB Administrator???s Guide

By: Cyrus Dasadia

Overview of this book

MongoDB is a high-performance and feature-rich NoSQL database that forms the backbone of the systems that power many different organizations. Packed with many features that have become essential for many different types of software professional and incredibly easy to use, this cookbook contains more than 100 recipes to address the everyday challenges of working with MongoDB. Starting with database configuration, you will understand the indexing aspects of MongoDB. The book also includes practical recipes on how you can optimize your database query performance, perform diagnostics, and query debugging. You will also learn how to implement the core administration tasks required for high-availability and scalability, achieved through replica sets and sharding, respectively. You will also implement server security concepts such as authentication, user management, role-based access models, and TLS configuration. You will also learn how to back up and recover your database efficiently and monitor server performance. By the end of this book, you will have all the information you need—along with tips, tricks, and best practices—to implement a high-performance MongoDB solution.
Table of Contents (17 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Understanding tag aware sharding – zones


In this recipe, we will be looking at MongoDB's shard zones. A zone is essentially a group of shards based on a specific set of tags. Zones can help the distribution of chunks based on tags, across shards. All reads and writes, pertaining to documents within a zone, are performed on shards matching that zone. There can be various scenarios where zone based sharded clusters can prove to be highly useful. For example:

  • An application that is geographically distributed would require that the frontend, as well as the data store, is close to the user

  • The application has a multi-tier hardware architecture such that certain records are fetched from a higher tier (low latency) hardware whereas others could be fetched from a low tier (high latency inducing) hardware

Note

If a document does not match any configured zone, MongoDB will write it to any chunk in the cluster.

Getting ready

We need a sharded cluster, preferably the one we created in the Managing chunk recipe...