Seems like there are two architectures that are commonly adopted. One is to make the server ever larger and more modular. E.G. separating processors/memory and

Seems like there are two architectures that are commonly adopted. One is to make the server ever larger and more modular. E.G. separating processors/memory and storage as separate entities that are individually configurable (like this article). The other is to make the server smaller and more parallel. E.G. 1000s of single socket/single hdd servers running in aggregate.