In an old post about storage architectures is described in a simple way some basic concepts, including the scale-in (or scale-up) vs. the scale-out approach. They are different approaches in scaling with different implications. Unfortunately there is a simple an well accepted definition on what is a scale-out storage is (or not is): some are limited in specific contests (like this one only for NAS or this SNIA tutorial still applied to a NAS storage), other are too much vendor specific. But usually a scale-out storage imply: Multi-device (or multi-array) storage systems (aggregated in a […]