February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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Introducing indirection
What happens to connections to a PostgreSQL system when the service must be shut down for maintenance, or the node itself experiences a hardware problem? Previous recipes have already recommended we integrate at least one data replica into our design, but how should we handle switching between these resources? A great way to achieve high availability is to make server maintenance or replacement as simple as possible.
The concept we'll be exploring in this recipe will be one of anticipating system outages, and even welcoming them, by incorporating proxy techniques into the design.
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