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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Upgrading to PostgreSQL 13

When upgrading from a previous PostgreSQL version, there are different approaches that you can follow depending on the specific context, the amount of data you need to migrate, and the version you are coming from.

One approach that always works is to dump and restore the databases: you execute pg_dumpall against your previous cluster and pg_restore against the PostgreSQL 13 one. The main advantages of this approach are that it is simple and works with any version of PostgreSQL you are upgrading from and to. The main drawbacks are that it requires an off-line migration, meaning you are going to have a period of time where the two databases are not usable; plus, it can require a lot of time and space depending on how much data you need to migrate.

Another approach is to use pg_upgrade, a tool designed to transfer and migrate data from one cluster to another one side by side. The idea is that pg_upgrade will have access to both the clusters at the same time and...

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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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