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

View More author details

Summary

In this chapter, we discussed logical replication. We have seen that logical replication is based on a concept of reverse engineering that starts with the analysis of WAL segments to extract the logical commands that have to be passed to a replica server. We saw that logical replication is useful when we want to replicate parts of databases and when we want to make hot migrations between different versions of PostgreSQL. Logical replication makes this possible because it does not binarily replicate data but rather extracts the logical DML commands from WAL, which are then replicated on the replica server. We have seen how to make a logical replica in practice and have addressed some of the issues that can occur when we work with logical replication.

In the next chapter, we'll talk about useful tools and useful extensions. We will see which tools are best to make life easier for a PostgreSQL DBA.

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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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