You're reading from Learn PostgreSQL

Product typeBook

Published inOct 2020

Reading LevelIntermediate

PublisherPackt

ISBN-139781838985288

Edition1st Edition

Languages

SQL

Tools

PostgreSQL

Concepts

Databases

Authors (2):

Luca Ferrari

Enrico Pirozzi

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Managing streaming replication

In this section, we will talk about replication. Why do we have to have replicas? The problem with PITR is that recovery often takes a long time before a server can be restored:

In a production environment, you often need to be able to restore the production environment as quickly as possible after a system crash. In order do this, we have to use the streaming replication technique. To make this possible, we need at least two servers, one master server and one slave server. The master server performs all the operations that will be requested by the application programs; the slave server will be available only for read operations and will have the data copied in real time.

Basic concept

The idea behind streaming replication is to copy the WAL files from the master server to another (slave) server. The slave server will be in a state of continuous recovery and it continuously executes the WAL that is passed by the master machine; in this way, the slave machine...

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Published in: Oct 2020Publisher: PacktISBN-13: 9781838985288

Authors (2)

Luca Ferrari

Luca Ferrari has been passionate about computer science since the Commodore 64 era, and today holds a master's degree (with honors) and a Ph.D. from the University of Modena and Reggio Emilia. He has written several research papers, technical articles, and book chapters. In 2011, he was named an Adjunct Professor by Nipissing University. An avid Unix user, he is a strong advocate of open source, and in his free time, he collaborates with a few projects. He met PostgreSQL back in release 7.3; he was a founder and former president of the Italian PostgreSQL Community (ITPUG). He also talks regularly at technical conferences and events and delivers professional training.
Read more about Luca Ferrari

Enrico Pirozzi

Enrico Pirozzi, EnterpriseDB certified on implementation management and tuning, with a master's in computer science, has been a PostgreSQL DBA since 2003. Based in Italy, he has been providing database advice to clients in industries such as manufacturing and web development for 10 years. He has been training others on PostgreSQL since 2008. Dedicated to open source technology since early in his career, he is a cofounder of the PostgreSQL Italian mailing list, PostgreSQL-it, and of the PostgreSQL Italian community site, PSQL
Read more about Enrico Pirozzi

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Managing streaming replication

Basic concept

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