February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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Switching live stack systems
At this point, we have our data located simultaneously on two servers. The second system can fulfill many possible roles. It can replace the current node in case of hardware failure, or allow us to perform server maintenance or upgrades with very little downtime.
Regardless of our intent, properly utilizing the second system is the key to a highly available database server. In this recipe, we'll discuss the proper method for activating the second server in a two-node pair so that we can make changes to one or both nodes.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.