PostgreSQL 12 High Availability Cookbook - Third Edition

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RAID controllers and network interfaces are somewhat special cases. Some servers integrate these directly into the motherboard in order to reduce size. This is especially true when it comes to network modules. If at all possible, try to resist relying solely upon integrated components.

The entire server will require replacement if these fail. This makes it much more difficult and expensive to fulfill our redundancy requirement. Server-class motherboards without integrated network interfaces are rare, but we can use these as our backup path if their minimum speed matches what we've configured.

For instance, if we want a 10 Gigabit Ethernet (GbE) card and the motherboard has integrated a 10 GbE module, we can reduce the number ...