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

Chapter 7. Replication Management Tools

In this chapter, we will learn where to turn when the management of large PostgreSQL clusters becomes a concern. We will cover the following recipes in this chapter:

  • Deciding when to use third-party tools
  • Installing and configuring Barman
  • Backing up a database with Barman
  • Restoring a database with Barman
  • Installing and configuring OmniPITR
  • Managing WAL files with OmniPITR
  • Installing and configuring repmgr
  • Cloning a database with repmgr
  • Swapping active nodes with repmgr
  • Installing and configuring walctl
  • Cloning a database with walctl
  • Managing WAL files with walctl
  • Installing and configuring WAL-E
  • Managing WAL files with WAL-E