You're reading from Mastering PostgreSQL 15 - Fifth Edition

Product typeBook

Published inJan 2023

PublisherPackt

ISBN-139781803248349

Edition5th Edition

Concepts

Robotic Process Automation

Author (1)

Hans-Jürgen Schönig

Setting up asynchronous replication

The idea behind streaming replication is simple. After an initial base backup, the secondary backup can connect to the master, fetch a transaction log in real time, and apply it. Transaction log replay is not a single operation anymore but rather a continuous process that is supposed to keep running for as long as a cluster exists.

Performing a basic setup

In this section, we will learn how to set up asynchronous replication quickly and easily. The goal is to set up a system that consists of two nodes.

Basically, most of the work has already been done for WAL archiving. However, to make it easy to understand, we will look at the entire process of setting up streaming because we cannot assume that WAL shipping is really already set up as needed.

The first thing to do is to go to the postgresql.conf file and adjust the following parameters:

wal_level = replica
max_wal_senders = 10     # or whatever value >...

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Mastering PostgreSQL 15 - Fifth Edition

Published in: Jan 2023Publisher: PacktISBN-13: 9781803248349

Author (1)

Hans-Jürgen Schönig

Hans-Jürgen Schönig has 20 years' experience with PostgreSQL. He is the CEO of a PostgreSQL consulting and support company called CYBERTEC PostgreSQL International GmbH. It has successfully served countless customers around the globe. Before founding CYBERTEC PostgreSQL International GmbH in 2000, he worked as a database developer at a private research company that focused on the Austrian labor market, where he primarily worked on data mining and forecast models. He has also written several books about PostgreSQL.
Read more about Hans-Jürgen Schönig

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You're reading from Mastering PostgreSQL 15 - Fifth Edition

Setting up asynchronous replication

Performing a basic setup

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