November 2019
Beginner to intermediate
470 pages
11h 59m
English
Content preview from Mastering PostgreSQL 12 - Third Edition
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Halting and resuming replication
Once streaming replication has been set up, it works flawlessly without too much administrator intervention. However, in some cases, it might make sense to halt replication and resume it at a later point. Why would anybody want to do that?
Consider the following use case: you are in charge of a master/slave setup, which is running a rubbish content management system (CMS) or some dubious forum software. Suppose you want to update your application from the awful CMS 1.0 to the dreadful CMS 2.0. Some changes will be executed in your database, which will instantly be replicated to the slave database. What if the upgrade process does something wrong? The error will be instantly replicated to both nodes due to ...
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