Azure IoT Hub Documentation - Tutorials, API Reference | Microsoft Docs
Azure IoT Edge - Tutorials, API Reference | Microsoft Docs
"Azure IoT Edge is an Internet of Things (IoT) service that builds on top of IoT Hub. This service is meant for customers who want to analyze data on devices, a.k.a. "at the edge", instead of in the cloud. By moving parts of your workload to the edge, your devices can spend less time sending messages to the cloud and react more quickly to changes in status."
- A module image is a package containing the software that defines a module.
- A module instance is the specific unit of computation running the module image on an IoT Edge device. The module instance is started by the IoT Edge runtime.
- A module identity is a piece of information (including security credentials) stored in IoT Hub, that is associated to each module instance.
- A module twin is a JSON document stored in IoT Hub, that contains state information for a module instance, including metadata, configurations, and conditions."
- "Edge Hub facilitates module to module communication. Using Edge Hub as a message broker keeps modules independent from each other.
- The IoT Edge agent is the other module that makes up the Azure IoT Edge runtime. It is responsible for instantiating modules, ensuring that they continue to run, and reporting the status of the modules back to IoT Hub."
Amazon's equivalent IoT solution:
Run IoT applications seamlessly across the AWS cloud and local devices using AWS Lambda and AWS IoT Core."
AWS Greengrass documentation