Comments by "" (@muizzy) on "Vertical Vs Horizontal Scaling: Key Differences You Should Know" video.

  1. One argument I missed here is that vertical scaling has better customisability than horizontal scaling. For example, if your box has 4GB of RAM and 2 CPU cores, but you're only running out of RAM, you can just create a box with 8GB of RAM and 2 CPU cores. Applying horizontal scaling here would mean you'd have to pay for unnecessary cores.
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  2.  @Deezedd  horizontal and vertical scaling are not mutually exclusive. As a simplified example, I can choose to scale a 100 box 1 core deployment to a 50 box 2 core deployment and vice versa.
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