Feel of a fog computing node as a bodily server that resides between the edge equipment (thermostats, robots, in-car desktops) and the back-close programs, typically hosted on general public clouds. The fog nodes reply to an architectural issue: too substantially latency to go requests all the way back to the general public cloud-centered companies and not plenty of horsepower to course of action the facts in the edge unit alone.
This a few-tier process provides yet another compute system that is in a position to do some—if not most—of the back-close processing. This addresses the issue that much less expensive edge equipment with reduced ability don’t have the processing and storage ability to offer with the incoming facts natively. Now facts can be sent to the fog node for processing, with out the latency influence of heading all the way back to the distant cloud companies.
Though fog nodes are a easy alternative to a easy situation, you ought to fully grasp when and when not to use them:
You ought to use fog nodes when facts that is complicated or in huge amounts need to have to be processed regionally and would overwhelm the edge-centered unit that is consuming the facts as perfectly. In other words and phrases, you need to have anything that responds in just about authentic time, this kind of as a manufacturing facility robotic shutting down when the servers overheat. You want that to be instantaneous.
You ought to use fog nodes when a human is ready for the reaction to return back to the edge unit. Like the need to have to reply to gatherings that simply cannot hold out, people need to have to be thought of near-authentic-time architectural factors. Folks are too pricey to be ready all-around for responses from the distant cloud programs.
You ought to use fog nodes when you are multiplexing facts from many distinctive sorts of edge equipment or sending many distinctive sorts of facts. The fog node manages the processing of facts from many edge equipment at after, working with issues this kind of as semantic transformation of the facts in advance of sending it to the back-close cloud servers. Or the fog node can course of action and reply specifically to the edge-centered unit.
Essentially, you ought to not use fog nodes unless of course the architecture and requirements suit the higher than criteria. In my book, they ought to be utilised sparingly, specially thinking about that they add price tag and operational complexity—and yet another layer that can fail.
Your ideal bet for now is to exclude them, and then figure out if you have conditions in which they can be of use.
Copyright © 2020 IDG Communications, Inc.