Skip to main content

Running Azure Stream Analytics on Edge Devices

Azure Stream Analytics enable us to analyze data in real time. Connecting multiple streams of data, running queries on top of them without having to deploy complex infrastructure become possible using Azure Stream Analytics.
This Azure service is extremely powerful when you have data in the cloud. But there was no way to analyze the data stream at device or gateway level.
For example if you are in a medical laboratory you might have 8 or 12 analyzers. To be able to analyze the counters of all this devices to detect a malfunction you would need to push counters value to Azure, even if you don't need for other use cases.

Wait! There is a new service in town that enable us to run the same Azure Stream Analytics queries but at gateway or device level - Azure Stream Analytics on Edge Devices. Even if the name is long and has Azure in the name, the service is a stand alone service that runs on-premises.
This service allows us to run the same queries in real time over data streams that we have on our on-premises devices. From the job (query) perspective we have the same features like SQL language, temporal filters, window query and full integration with JavaScript code.
On of the key features of Azure Stream Analytics on Edge Devices is the low latency, that is perfect for systems where we need to react fast without downtime. This service comes as a component inside Azure IoT Gateway SDK, but doesn't limit us to use Azure, we can push data from our queries to our own custom modules.

Using this service we can now analyze data streams directly on our gateways and push to the cloud only the tings that we want. The same query that we have on the cloud we can run it now on our gateway and push only relevant data to Azure. Beside this, we can generate alerts or actions on our gateway from Azure Stream Analytics on Edge Devices and react directly on our gateway or device.
Key features:

  • On-premises
  • SQL-like query
  • Low latency
  • OPC-UA, MQTT, Modbus support
  • Same features as Azure Stream Analytics 
You can find more about this it on Azure blog.

Comments

Popular posts from this blog

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

[Post-Event] Codecamp Conference Cluj-Napoca - Nov 19, 2016

Last day I was invited to another Codecamp Conference, that took place in Cluj-Napoca. Like other Codecamp Conferences, the event was very big, with more than 1.000 participants and 70 sessions. There were 10 tracks in parallel, so it was pretty hard to decide at  what session you want to join.
It was great to join this conference and I hope that you discovered something new during the conference.
At this event I talked about Azure IoT Hub and how we can use it to connect devices from the field. I had a lot of demos using Raspberry PI 3 and Simplelink SensorTag. Most of the samples were written in C++ and Node.JS and people were impressed that even if we are using Microsoft technologies, we are not limited to C# and .NET. World and Microsoft are changing so fast. Just looking and Azure IoT Hub and new features that were launched and I'm pressed (Jobs, Methods, Device Twin).
On backend my demos covered Stream Analytics, Event Hub, Azure Object Storage and DocumentDB.

Title:
What abo…