Earlier in this chapter, we pictured a speed layer in our architecture consisting of an IoT hub and/or event hub(s) serving as a cloud gateway and a streaming analytics engine. A cloud gateway is paired with a field gateway at the edge, or the cloud gateway will sometimes communicate directly with the smart devices themselves.
Some organizations deploy the speed layer on-premises instead of in the cloud to be located close to their existing batch layer systems. If transmission of data occurs to a central on-premises location, the gateway architecture would be similar, except an on-premises gateway would be pictured in our earlier diagram instead of the cloud gateway. This is especially common in organizations that built Industrial Internet solutions prior to public clouds gaining in popularity and the functionality required for these types of...
