Book Image

MySQL 8 Cookbook

By : Karthik Appigatla
Book Image

MySQL 8 Cookbook

By: Karthik Appigatla

Overview of this book

MySQL is one of the most popular and widely used relational databases in the World today. The recently released MySQL 8 version promises to be better and more efficient than ever before. This book contains everything you need to know to be the go-to person in your organization when it comes to MySQL. Starting with a quick installation and configuration of your MySQL instance, the book quickly jumps into the querying aspects of MySQL. It shows you the newest improvements in MySQL 8 and gives you hands-on experience in managing high-transaction and real-time datasets. If you've already worked with MySQL before and are looking to migrate your application to MySQL 8, this book will also show you how to do that. The book also contains recipes on efficient MySQL administration, with tips on effective user management, data recovery, security, database monitoring, performance tuning, troubleshooting, and more. With quick solutions to common and not-so-common problems you might encounter while working with MySQL 8, the book contains practical tips and tricks to give you the edge over others in designing, developing, and administering your database effectively.
Table of Contents (20 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Introduction


As explained in Chapter 6Binary Logging, replication enables data from one MySQL database server (the master) to be copied to one or more MySQL database servers (the slaves). Replication is asynchronous by default; slaves do not need to be permanently  connected  to receive updates from the master. You can configure to replicate all databases, selected databases, or even selected tables within a database.

In this chapter, you will learn how to set up traditional replication; replicate selected databases and tables; and set up multi-source replication, chain replication, delayed replication, and semi-synchronous replication.

 

On a high level, replication works like this: all DDL and DML statements executed on a server (master) are logged into binary logs, which are pulled by the servers connecting to it (called slaves). The binary logs are simply copied to the slaves and are saved as relay logs. This process is taken care of by a thread called IO thread. There is one more thread...