Foundation First
Remember, in real estate it is “location, location, location”; in HA solutions, it is “foundation, foundation, foundation.” Laying in the proper hardware and software components will allow you to build most HA solutions in a solid and resilient way. As you can see in Figure 9.1, these foundation elements relate directly to different parts of your system stack.
Figure 9.1. Foundation elements and their effect on different system stack components.
Specifically, these are
Putting hardware/network redundancies into place shores up your network access and long-term stability of your servers themselves.
Making sure ...
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