February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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How it works...
Surprised that it's so simple? Don't be. Much like /proc/meminfo and /proc/cpuinfo, the difficulty is not in obtaining the information we need, but in interpreting it. The first thing that concerns us is the bond mode. There are several modes, but only one is relevant to us for a dual-failover configuration. The mode should reflect some kind of an active-backup status; otherwise, it's combining the interfaces for bandwidth and throughput purposes. The line we want looks like this:
Bonding Mode: fault-tolerance (active-backup)
Next, we check the currently active interface. If the system was configured so that the network bond is in active-backup mode, only one is active at any one time. The other server acts as a backup in ...
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