Book Image

High Availability MySQL Cookbook

By : Alexander Davies
Book Image

High Availability MySQL Cookbook

By: Alexander Davies

Overview of this book

High Availability is something that all web sites hope to achieve, especially those that are linked to big companies.MySQL, an open source relational database management system (RDBMS), can be made highly available to protect from corruption, hardware failure, software crashes, and user error. Running a MySQL setup is quite simple. Things start getting complex when you start thinking about the best way to provide redundancy. There are a large number of techniques available to add 'redundancy' and 'high availability' to MySQL, but most are both poorly understood and documented.This book will provide you with recipes showing how to design, implement, and manage a MySQL Cluster and achieve high availability using MySQL replication, block level replication, shared storage, and the open source Global File System (GFS).This book covers all the major techniques available for increasing availability of your MySQL databases. It demonstrates how to design, implement, troubleshoot and manage a highly available MySQL setup using any one of several techniques, which are shown in different recipes. It is based on MySQL Cluster 7.0, MySQL (for non clustered recipes) 5.0.77, and CentOS / RedHat Enterprise Linux 5.3.The book starts by introducing MySQL Cluster as a technology and explaining how to set up a simple cluster. It will help you to master the options available for backing up and restoring a file in the MySQL Cluster. By following the practical examples in this book, you will learn how to manage the MySQL Cluster. Further, we will discuss some troubleshooting aspects of the MySQL Cluster.We also have a look at achieving high availability for MySQL databases with the techniques of MySQL Replication, block level replication, shared storage (a SAN or NAS), and DRBD.Finally, you will learn the principles of Performance tuning and tune MySQL database for optimal performance.
Table of Contents (17 chapters)
High Availability MySQL Cookbook
Credits
About the Author
About the Reviewers
Preface
Base Installation
Index

Importing SQL files to a MySQL server and converting them to MySQL Cluster


It will often be required to import data from an SQL file and then convert this freshly installed data to have a storage engine of NDB (MySQL Cluster's storage engine). This may be required for the following reasons:

  • Importing mysqldump backup files in the case of a recovery

  • Importing data from a non-clustered system into a cluster, for example, a mysqldump from an old system into a new cluster

In this recipe, we will follow an example that uses the world sample dataset provided by MySQL for testing use. We will import it to MySQL, convert it from the default table engine (in our case, MyISAM) to MySQL Cluster (NDBCLUSTER storage engine), and then check that it appears on all the SQL nodes in the cluster.

This example uses a simple cluster with two SQL nodes—node1 and node2 (the configuration of the rest of the MySQL Cluster is irrelevant).

How to do it…

The world sample database is provided as a SQL file which includes...