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MySQL 8 Cookbook

You're reading from MySQL 8 Cookbook Over 150 recipes for high-performance database querying and administration

Product type Paperback

Published in Jan 2018

Publisher

ISBN-13 9781788395809

Length 446 pages

Edition 1st Edition

Tools

MySQL

Concepts

Database Administration

Author (1):

Karthik Appigatla

View More author details

Table of Contents (15) Chapters

Preface

1. MySQL 8 - Installing and Upgrading FREE CHAPTER

2. Using MySQL

3. Using MySQL (Advanced)

4. Configuring MySQL

5. Transactions

6. Binary Logging

7. Backups

8. Restoring Data

9. Replication

10. Table Maintenance

11. Managing Tablespace

12. Managing Logs

13. Performance Tuning

14. Security

Setting up delayed replication

Sometimes, you need a delayed slave for disaster recovery purpose. Suppose a disastrous statement (such as a DROP DATABASE command) was executed on the master. You have to use point-in-time recovery from backups to restore the database. It will lead to a huge downtime depending on the size of the database. To avoid that situation, you can use a delayed slave, which will be always delayed from the master by a configured amount of time. If a disaster occurs and that statement is not applied by the delayed slave, you can stop the slave and start until the disastrous statement, so that the disastrous statement won't be executed. Then promote it to master.

The procedure is exactly the same as setting up normal replication, except that you specify MASTER_DELAY in the CHANGE MASTER TO command.

How is the delay measured?

In versions earlier than MySQL 8.0, the delay is measured based on the Seconds_Behind_Master value. In MySQL 8.0, it is measured based on original_commit_timestamp...

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Authors (1)

Karthik Appigatla

Karthik Appigatla

Karthik Appigatla is a highly reputed database architect and is very famous for performance tuning. He has been consulted by many companies all over the world for designing, performance tuning, building database infrastructure, and training. In his decade of experience, he has worked for companies such as Yahoo, Pythian, and Percona. Currently, he is working for LinkedIn, where he has innovated a new way of analyzing queries. He gave a talk about this at SRECon, Dublin in 2017.

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