I think in most cases supercomputers are in fact "flexible arrays of less powerful nodes". It's just that you need to change the architecture as you scale up th

I think in most cases supercomputers are in fact "flexible arrays of less powerful nodes". It's just that you need to change the architecture as you scale up the number nodes and type of nodes. Basically, you need fast data transfer and memory sharing between these nodes if you want to do anything but the most embarrassingly parallel problems.