February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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Remember redundancy
One of the first things this chapter suggested was to consider extra inventory. Yet we haven't really covered online backups. Most server-class motherboards include not just one, but two onboard network modules. Each module commonly provides four Ethernet interfaces.
Usually, each interface is considered separate, and two interfaces from each module are connected to two switches in the data center. This allows server administrators to seamlessly perform maintenance on either switch without disrupting our network traffic. Furthermore, if a switch or network module fails, there's always a backup available.
In our working example, we would need eight 1 Gb/s interfaces to avoid experiencing network congestion. However, we've ...
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