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Why should he give an example of a "monster server" with specs like that?

He gave the argument that spreading the CPU's and memory out does not make them better.

So part of the point is that if the starting point is 8TB of RAM and 4096 cores distributed over a bunch of machines, then a "large machine" approach will require substantially less.

I've not done the maths for whether or not a "Twitter scale" app would fit on a single current generation mainframe or similar large scale "machine" (what constitutes a "machine" becomes nebulous since many of the high end setups are cabinets of drawers of cards and on persons "machine" is another persons highly integrated cluster), but it would need to include a discussion of how much a tighter integrated hardware system would reduce their actual resource requirements.

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