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PostgreSQL High Availability Cookbook - Second Edition

You're reading from PostgreSQL High Availability Cookbook - Second Edition

Product type Book

Published in Feb 2017

Publisher Packt

ISBN-13 9781787125537

Pages 536 pages

Edition 2nd Edition

Languages

Concepts

High Performance Programming

Author (1):

Shaun Thomas

Table of Contents (18) Chapters

Title Page

Credits

About the Author

About the Reviewer

www.Packtpub.com

Customer Feedback

Preface

1. Hardware Planning

2. Handling and Avoiding Downtime

3. Pooling Resources

4. Troubleshooting

5. Monitoring

6. Replication

7. Replication Management Tools

8. Simple Stack

9. Advanced Stack

10. Cluster Control

11. Data Distribution

Preparing startup services

A common interpretation of a functional server is one that runs on its own recognizance. After being rebooted, it starts all necessary services and does its job as configured. It might be hard to believe, but we want to fight that inclination for two important reasons:

Pacemaker is a state machine
Pacemaker needs total control of any service it manages

Pacemaker wants to start services itself so it knows that the current status is the one it created. It will perform tests to obtain this information, but for things such as DRBD, this isn't always reliable. It's generally safer to start from scratch. Beyond this, if a service that isn't supposed to be running starts, Pacemaker will only have to stop it anyway.

In this recipe, we'll quickly cover which services to disable on each of our PostgreSQL nodes.

Getting ready

As we're continuing to configure Corosync and Pacemaker, make sure you've followed all the previous recipes.

How to do it...

For this recipe, we will use the...

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Authors (1)

Shaun Thomas

Shaun M. Thomas has been working with PostgreSQL since late 2000. He is a frequent contributor to the PostgreSQL Performance and General mailing lists, assisting other DBAs with the knowledge he's gained over the years. In 2011 and 2012, he gave presentations at the Postgres Open conference on topics such as handling extreme throughput, high availability, server redundancy, and failover techniques. Most recently, he has contributed the Shard Manager extension and the walctl WAL management suite. Currently, he serves as the database architect at PEAK6 Investments, where he develops standard operating procedure (SOP) guidelines to facilitate reliable server architecture among many other tasks. Many of the techniques used in this book were developed specifically for this extreme environment. He believes that PostgreSQL has a stupendous future ahead, and he can't wait to see the advancements subsequent versions will bring. https://www.linkedin.com/in/bonesmoses

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