PostgreSQL Cookbook by Chauhan Chitij;

Author:Chauhan, Chitij;
Language: eng
Format: epub
Publisher: Packt Publishing

Chapter 7. High Availability and Replication

In this chapter, we will cover the following recipes:

Setting up hot streaming replication

Replication using Slony-I

Replication using Londiste

Replication using Bucardo

Replication using DRBD

Setting up the Postgres-XC cluster

Introduction

The important components for any production database is to achieve fault tolerance, 24/7 availability, and redundancy. It is for this purpose that we have different high availability and replication solutions available for PostgreSQL.

From a business perspective, it is important to ensure 24/7 data availability in the event of a disaster situation or a database crash due to disk or hardware failure. In such situations, it becomes critical to ensure that a duplicate copy of the data is available on a different server or a different database, so that seamless failover can be achieved even when the primary server/database is unavailable.

In this chapter, we will talk about various high availability and replication solutions, including some popular third-party replication tools such as Slony-I, Londiste, and Bucardo. We will also discuss block-level replication using DRBD, and finally, set up a PostgreSQL extensible cluster, that is, Postgres-XC.

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