Book Image

PostgreSQL High Availability Cookbook - Second Edition

By : Shaun Thomas
Book Image

PostgreSQL High Availability Cookbook - Second Edition

By: Shaun Thomas

Overview of this book

Databases are nothing without the data they store. In the event of a failure - catastrophic or otherwise - immediate recovery is essential. By carefully combining multiple servers, it’s even possible to hide the fact a failure occurred at all. From hardware selection to software stacks and horizontal scalability, this book will help you build a versatile PostgreSQL cluster that will survive crashes, resist data corruption, and grow smoothly with customer demand. It all begins with hardware selection for the skeleton of an efficient PostgreSQL database cluster. Then it’s on to preventing downtime as well as troubleshooting some real life problems that administrators commonly face. Next, we add database monitoring to the stack, using collectd, Nagios, and Graphite. And no stack is complete without replication using multiple internal and external tools, including the newly released pglogical extension. Pacemaker or Raft consensus tools are the final piece to grant the cluster the ability to heal itself. We even round off by tackling the complex problem of data scalability. This book exploits many new features introduced in PostgreSQL 9.6 to make the database more efficient and adaptive, and most importantly, keep it running.
Table of Contents (18 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Setting up Londiste

To complete our suite of popular logical replication tools, we would like to introduce Londiste. It is one of the SkyTools PostgreSQL utilities contributed by Skype in 2007. Why another replication system? Due to other capabilities offered by this suite of tools, you may decide to use one or more of them. Knowing how to leverage Londiste can simplify the total software stack and thereby increase server stability and simplicity.

In addition, like Bucardo, its usage is much simpler than Slony due to its suite of command-line tools. Let's continue with the installation of Londiste on two PostgreSQL servers, and perhaps, we might utilize other SkyTools functionality later.


Londiste has not seen a code update since April 2014. As such, we consider the project abandoned. Due to several changes in the PostgreSQL code, Londiste will not even compile against version 9.6. If you rely on this software in any critical database, we strongly recommend switching to another logical...