Fundamentally, SDN is still mostly about network plumbing. While plumbing may be useful to tinker with, what you can do with your plumbing is far more intriguing. A rigid interpretation of SDN confines it to Layers 2 and 3, and that’s reasonable. But SDN opens opportunities for novel constructions in Layers 4 to 7 that solve real operational problems in data centers. “Data center,” in fact, might become anachronistic – data is everywhere, constantly on the move, seemingly always overflowing. Networks move data, but not all networks are suitable for all data.
In his session at 15th Cloud Expo, Steve Riley, Technical Leader in the Office of the CTO at Riverbed Technology, will discuss how finding (or building) the right network, with the right applications, is still a labor-intensive task. Must it always be this way? No: for networks will soon be expressed as code. Finally, the data, the applications that process it, the networks that move it and the objects that store it can all be described by software constructs – let’s call this collection a super-blob – in the hands of skilled developers. Freed from their dependence on any given location, super-blobs can move around as necessary, resting on any physical fabric that can satisfy their requirements. As requirements change, locations may change – while preserving all application states. Location-independent computing is within our grasp.