Book Image

Learn PostgreSQL

By : Luca Ferrari, Enrico Pirozzi
Book Image

Learn PostgreSQL

By: Luca Ferrari, Enrico Pirozzi

Overview of this book

PostgreSQL is one of the fastest-growing open source object-relational database management systems (DBMS) in the world. As well as being easy to use, it’s scalable and highly efficient. In this book, you’ll explore PostgreSQL 12 and 13 and learn how to build database solutions using it. Complete with hands-on tutorials, this guide will teach you how to achieve the right database design required for a reliable environment. You'll learn how to install and configure a PostgreSQL server and even manage users and connections. The book then progresses to key concepts of relational databases, before taking you through the Data Definition Language (DDL) and commonly used DDL commands. To build on your skills, you’ll understand how to interact with the live cluster, create database objects, and use tools to connect to the live cluster. You’ll then get to grips with creating tables, building indexes, and designing your database schema. Later, you'll explore the Data Manipulation Language (DML) and server-side programming capabilities of PostgreSQL using PL/pgSQL, before learning how to monitor, test, and troubleshoot your database application to ensure high-performance and reliability. By the end of this book, you'll be well-versed with the Postgres database and be able to set up your own PostgreSQL instance and use it to build robust solutions.
Table of Contents (27 chapters)
Section 1: Getting Started
Section 2: Interacting with the Database
Section 3: Administering the Cluster
Section 4: Replication
Section 5: The PostegreSQL Ecosystem

Managing the pgbackrest tool

In Chapter 18, Logical Replication, we talked about disaster recovery and PITR, and we saw how to conduct them programmatically. In the real world, a DBA has to manage multiple PostgreSQL servers and it is useful to have some tools to make life easier. The open source world offers us a lot of solutions to address disaster recovery in an easy way. Some of these tools are listed here:

  • WAL-E
  • pgbarman
  • OmniPITR

There are many others, and at, you can find a good comparison of them all.

In this section, we will give a nod to pgbackrest. The pgbackrest tool is a tool for PostgreSQL disaster recovery and PITR, and it has been designed for heavy load servers. Its official URL is

These are some of the features of the tool:

  • It supports parallel backup and parallel restore.
  • It can make full base backups, incremental backups, or differential backups.
  • We can choose to make local operations...