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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

Faking replication with pg_receivexlog

Some built-in tools deserve special mention. The pg_receivexlog command was introduced with PostgreSQL 9.2. With this new utility, PostgreSQL has the ability to transmit transaction logs to a remote system without the need for a dedicated PostgreSQL server. This also means that we can avoid ad hoc tools such as rsync when maintaining an archive server to save old WAL files.

This allows us to set up any server to pull transaction logs directly from the primary PostgreSQL server. For highly available servers, PostgreSQL no longer needs to fork an external command to safeguard transaction logs into an archive location. In addition, we can monitor the state of the transmission through the pg_stat_replication system view.

In effect, we remove quite a bit of overhead from our PostgreSQL server and offload it to a less sensitive system. This recipe will provide a quick outline for using this utility.

Getting ready

Before starting with this recipe, ensure that...

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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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