How do you scale an AWS (Amazon Web Services) infrastructure? In Part Two of the article, I describe the architecture model and the underlying technical components you should use in order to implement a scalable infrastructure. We will look in particular at the optimisation of data access in scale-out-type architectures suitable for implementation as a distributed system, as much at the data model level as the lower layers for I/O optimisation. We will also examine the recommended development concepts such as Stateless, in the finest REST tradition. I will end the article with some tips and tricks. My aim is to help you set up and optimise your infrastructure by understanding how Amazon tools operate and to get the most benefit from them.