I was going through Azure new offering Digital Twin and trying to understand what makes it different and unique so that organization will use it and will not invest in developing theirs own DT systems.
I also posted the question on https://channel9.msdn.com/Shows/Internet-of-Things-Show/Getting-started-with-Azure-Digital-Twins?term=%22Azure%20Digital%20Twins%22&lang-en=true and got the response for https://techcommunity.microsoft.com/t5/azure-iot/at-the-end-of-the-day-what-is-digital-twins-about/m-p/759502#.XS9eIPFF0Pc.link
All links explains the functional details but nowhere it is mentioned what are the core components for building ADT, internal details and how much effort goes to build one w.r.t to using Azure offering. obviously, it is PaaS offering so it will always beneficial to use one then creating one but what are components will need to create one.
Thanks
Azure Digital Twins provides its own Swagger and API and a Spatial Graph.
That's the benefits of Azure Digital Twins.
In my company we made a POC of ADT, and now we are looking to implement another solution to replace it because in Preview Version it has some limits. (100 message / seconds is not enough for us).
But to replace it we will need to completly redesign the Spatial Graph and to redefine every single item that Azure Digital Twins allows you to use. (Devices / Sensors / Spaces)
It's really complicated to do that.
I think that the solution provided by MS is clearly great to treat with IoT objects, smartbuilding because of that SpatialGraph and API.
Related
I develop a commercial Asp.Net MVC Web Application. The application is standard, runs on IIS Web Server and utilizes SQL Server database. Our business model is such that we deploy our application on-site in our customers’ Intranet or data center. That is, for each such customer (account) we supply the complete setup, usually installed in a dedicated standalone server. Each such account has its own private content, users, configurations and so on.
We wish to expand and offer our service on the WWW (public Internet). After some research, I’ve chosen Microsoft’s Azure cloud platform to host our application. With some minor efforts (mainly teaching the application to work with Azure’s File Storage using blobs) I’ve managed to fully deploy to the cloud, using three cloud services: Web Site, Data base and File Storage.
Please note that I employ the same code base for the two deployment types (Intranet and Cloud), by using different configurations for Debug, Release – Intranet, Staging – Azure, Production – Azure.
However, the application (as is it written now) can serve only a single customer account, while I need our cloud version to serve numerous accounts (hopefully a lot ;) … each with its own private data set.
Question: which of the following strategies should I employ here?
Change the application so it will support multiple accounts. This means changes both in the data model (adding an Account entity in the data layer, bind it to all content types, etc.) and in the business logic.
Create for each Account its own site on the cloud (web site + data base + file storage services). This means deploying several times the same application to different Azure services.
It’s obvious that the amount of development needed for the 1st approach here is very large as is the risk in stability of the system, while the 2nd approach requires much less effort.
However, im not clear about how to manage a set of many identical services (applications) each serving a different customer account. I’ve started looking for some tools to help me here (e.g. Red Gate), and would love to hear of more.
Another question is the cost – is such a solution, using many cloud services instead of only few, more costly that the more standard “one application for all accounts” approach.
thanx,
I would recommend (1). It is a higher short term cost in terms of development effort, but will be better for two reasons long term:
Cheaper. The costs will go up quite a bit by adding more cloud services. I suppose you could pass this cost on to your client though?
It does become harder to manage releases across many clients.
I would say you can either spend your time refactoring existing code you know - or - you can learn how to do dev ops against Azure to manage releases. Probably easier to refactor what you know instead of learn something new.
As a note there are many great SDKs to automate deployments, scaling cloud services, etc.
Found some good reading about this issue:
MSDN: Developing Multi-tenant Applications for the Cloud, 3rd Edition
Provides good comparison between the two approaches:
Single Instance, Multi-tenant (my 1st option)
Multi Instance, Single-tenant (my 2nd option)
As it looks i will go with the Multi-tenant approach. All things considered it looks like it will require less development effort and will need less effort in maintenance. Also, my expertise lies in application development and less in system administration (which is required for truly implementing multi-instance solution).
Other reasons: there's a need to share some of the content between accounts (tenants), and this will be more easily achieved when using a single database. Also, there are future plans for the product which can utilize this solution.
Segregation of data will be done (high level):
File storage (blobs): use a separate container for each tenant (account).
Database: use tenant unique key to associate content to tenant
Cahce: use tenant unique key to generate cache keys for cached data items.
Scalability: it is easier using one instance to simply scale up its capabilities, or even move the Web Site to a dedicated virtual machine. In the future can also enhance the system to a Multi-instance, Multi-tenant structure, creating new separate instances for large tenants.
My intention is to develop and MVC app driven by WCF services.
I will then like to deploy these to Azure.
Can I go about developing my app and services without any consideration to the fact they will be hosted in Azure earlier on in the lifecycle? Or must I structure it differently?
EDIT: More specifically - am I right in saying I can develop this application just as I would prior to deciding it would be hosted in Auzre?
Based on my research and understanding, it is a better practice to consider your future implementation to azure prior to any development, however even if you later decide to move an existing application to azure, you may need to perform some modifications to your code.
please bear in mind that, Microsoft is currently offering websites in azure that can host you asp application, you may want to read more about that.
here is some links that may help you.
http://www.windowsazure.com/en-us/home/features/web-sites/
http://www.windowsazure.com/en-us/manage/services/web-sites/
The advert that appears on this page as I answer this question says "Move apps to the cloud without rewriting them".
The official position from Microsoft (who pays for the ads), is that you can migrate to Azure late in the development cycle.
The reality is:
You lose a lot of the benefits of could computing if you don't architect specifically for the cloud. This applies to any cloud platform, not just Azure.
There are likely some hidden 'gotchas' that will trip you up if you develop for normal Windows and then try and move it up to Azure. Just this morning I had a developer that was frustrated by errors on SQL Azure that didn't occur on his dev machine. The approach to SQL Azure is different to standard SQL (feature differences, throttling, etc).
There are two 'it depends' that are related:
Are you intending to use cloud services or Azure websites? Azure websites are easier to migrate because they are closer to a traditional web development approach.
Applications with lots of moving parts, or that are subject to high load, need special consideration (regardless of the target platform), so you will want to optimise for, and take advantage of, Azure specifics.
If you have a good reason not to develop specifically for Azure (such as your employers official position, platform portability, etc) then don't worry about Azure for now. If your long-term intention is to run your app on Windows Azure, then code for Azure up front — the effort to take it off Azure (lock-in) will form part of your decision later on.
I am beginning work on an individual project to bring an existing product out of the dark ages of classic ASP and into the light. My biggest decision to make before embarking on this lengthy journey is determining what frameworks and methodology I will implement for the new design.
Right now I am looking at MVC or MVVM (from what I gather this is just Silverlight?) for the web interface, Entity Framework or something I write myself as the model and MSSQL as the data.
Unfortunately I am just a fledgling programmer and I am not particularly aware of trends in the world of programming in general. I don't know what is just a passing fad and what technologies actually have lasting potential. I would really like to use something that is likely to remain relevant for some time. So I am looking to the professionals here for input on ideas that worked for you, pitfalls to watch out for and things to keep an eye on.
I appreciate any and all suggestions, keeping in mind that using the Microsoft and .Net is something of a prerequisite. I really want to make sure I am headed in the right direction before I start as this will probably take several months.
As for frameworks I personally suggest:
ASP.NET MVC 3 of MVC 4, depending on the question if beta software is allowed.
Entity Framework 4.3 or 5.0. 5.0 is a lot faster (is has auto compilation) but it's still a Release Candidate.
AutoMapper to map between Entities and ViewModels.
Ninject for dependency injection (useful if you want to write unit tests).
JQuery for stuff like clientside validation (integrates perfectly with ASP.NET MVC).
Possible some CSS framework like Bootstrap.
Maybe RestSharp so you can easily perform requests.
In case it's a cloud service (most SaaS are) and you'd like to host it on Azure (brilliant integration with the .NET stack) you'll need the Azure SDK.
As for software achitecture:
Use service layers
Use the repository patterns
Use ViewModels to pass to your view instead of entities
Set up a dependency injection container
That's my advice, I personally find this a golden combination for building enterprise applications (while not wasting too much time configuring lots of things).
Pitfalls:
I don't know if unit testing is really necessary. I should definately keep it in mind while setting up the architecture, but I personally choose to do that later because I don't even know if my product will succeed, so I can better put my time in building a fast Minimal Viable Product.
Don't assume anything. You can waste months of your precious time working on a cool feature that you think everyone will like, but often this is not the case. Do just the absolutely required minimum, and improve it later if your users like it.
I will add more to #Leon suggestions as I see those suggestion are great from application framework perspective, while I wanted to write here from cloud methodology perspective.
As you have chosen SaaS, definitely you are moving completely in Cloud while bring your application and data to cloud all together, that's great!!
There are several layers to any cloud application and to understand lets see what a cloud service stack look like. If we take an example of Windows Azure:
You have Compute, where your application runs with a web server (or not).
You have Azure table store which you can use to store key value pair in a row and then access them very fast.
You have Azure Queue allows decoupling of different parts of a cloud application, enabling cloud applications to be easily built with different technologies and easily scale with traffic needs.
You have Access Control Services to authenticate users through OpenID or AD
You have service bus to connect other services in cloud or on-premise at 3rd party.
You have Azure Blob storage to use as web based flat file server
You have Azure Cache (an in-memory cache build to scale in cloud)
You have SQL Azure as you cloud database
There are many more services which you can explorer and use
So when you decide to move your application from traditional web hosting to cloud you really have to look about how to take advantage of these different cloud services to scale your application when needed and save you lots of money.
With you application in Cloud you try something as below:
Keep you application logic as small as possible
Keep your static content outside the compute
Use cloud based cache for fast access as application scale out
Move data out of traditional RDBMS databases to NoSQL Framework (key-value pair, document etc to save money and flexibility), if possible and applicable
Take advantage of other available services to reduce application complexity
If you consider above aspect in your mind you will create a true cloud based application which will be fast and will save you money.
I would like to create a simple ASP MVC3 web applications for learning and have this hosted. I am familiar with ASP MVC but don't yet know much about the Azure cloud. If possible I would like to have these hosted on the cloud but I'm not sure where to start.
Can anyone give me any advice. For example for something very very low usage and making use of a SQL CE database what kind of azure account do I need and approximately how much would it cost.
Thanks in advance for your help.
For ASP.NET MVC 3 the thing to do is "bin deploy" it - Scott Hanselman has a post on doing exactly that on his blog:
http://www.hanselman.com/blog/BINDeployingASPNETMVC3WithRazorToAWindowsServerWithoutMVCInstalled.aspx
I recommend you download the Windows Azure platform training kit and work through the first few labs just to get the feel of Azure.
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=413E88F8-5966-4A83-B309-53B7B77EDF78&displaylang=en
I agree with Nathan and XIII - you have to ditch SQL CE it just doesn't work in the elastic cloud model, look at Azure table storage instead, it's cheap and scalable. (And it's in the first lab)
If you're just playing around then grab the introductory offer on Nathan's link, it's a free start. Unfortunately you can't use it to run something permanently as there aren't enough hours. (Apparently that may change in the new year). If you want to run a very small instance for a month it's about $40, a small is $90.
If you're more serious than that, join Bizspark and get free access to more resources.
You can easily create an ASP.NET MVC project and host it on a single role. While #XIII is correct that you need to have two instances to get the Azure SLA, if you are just playing around a single instance will be fine. You should check out the special offers here: http://www.microsoft.com/windowsazure/offers/ With the Development Accelerator Core you get 750 hours of a small compute instance, which I believe you could swapped for 2x extra small insances for the same cost. (Double check this before you do it!) Additionally, you get 1 million storage transaction and 10gb of storage space. If you are starting with a new Azure app, I would recommend looking at blob storage and table storage rather than a traditional database. Azure Storage is much more scalable and will be much less expensive than SQL Azure for small scale deployments. I would suggest using the Windows Azure Toolkit to get started with table and blob storage.
I would stay away from trying to use SQL CE or any other database running on your Azure roles. That is going to be a lot more headache than it is worth for a simple deployment. If you must have a SQL database, you can get a 1gb SQL Azure instance for $10 per month.
You need at least two instances if you want to have an SLA.
Depending on the load you expect I would assume that a Small instance variant would be enough for you.
making use of a SQL CE database
That would rather become either SQL Azure or table storage instead. SQL Azure costs quite some more money than table/blob storage so try to get more information about what you want to use if costs matter to you.
To calculate the costs I suggest you check out this great tool: http://azureroi.cloudapp.net/.
I just watched the Windows Azure intro video and it left me feeling like it was a front end shell for hosted IIS instances. Can anyone who know more (possibily that was part of the beta) shed on why you would use this vs. EC2.
it seemed easy enough but really didnt give specifics on how it works, why it works or why you would use this vs the traditional solutions out there?
According to the vision (and I can only talk about the vision here since the product isn't really out yet), here's a couple of reasons you might consider Azure over EC2.
Azure includes built-in load balancing abilities. If you want to do that in Amazon, you have to roll your own solution or buy a third-party solution like www.RightScale.com.
Azure-friendly-coded apps can be delivered internally or in Microsoft's cloud. If you write apps that have confidential information like financial data or health care data, not all of your clients will be willing to put their data in the public cloud. In that case, they can deploy your apps internally on Windows. That's sold as a skillset win, because you can go from public to private projects. Don't get me wrong - if you master Amazon EC2 development, then you can deploy your apps internally with Linux virtual servers in your datacenter, but it's not as turnkey. (Hard to describe a tech preview as turnkey when it's not licensed yet, hahaha.)
Having said that, it wasn't clear that the load balancing functionality is included in the box with internal deployments. If you have to do a combination of Azure plus ISA Server, that'll be a tougher deployment and management sell.
AppHarbor is a .NET cloud hosting environment that sits on Amazon EC2. The nice thing is they offer a free plan (much like Heroku does) so you can check it out yourself with very little friction.
My company is using Amazon EC2 now and I am down at the PDC watching the details on Azure unfold. I have not seen anything yet that would convince us to move away from Amazon. Azure definitely looks compelling, but the fact is I can now utilize Windows and SQL server on Amazon with SLAs in place. Ray Ozzie made it clear that Azure will be changing A LOT based on feedback from the developer community. However, Azure has a lot of potential and we'll be watching it closely.
Also, Amazon will be adding load balancing, autoscaling and dashboard features in upcoming updates to the service (see this link: http://aws.amazon.com/contact-us/new-features-for-amazon-ec2/). Never underestimate Amazon as they have a good headstart on Cloud Computing and a big user base helping refine their offerings already. Never underestimate Microsoft either as they have a massive developer community and global reach.
Overall I do not think the cloud services of one company are mutually exclusive from one another. The great thing is that we can leverage all of them if we want to.
Microsoft should offer up the ability to host Linux based servers in their cloud. That would really turn the world upside down!
Well it's more than just web services. It will also allow you to host other types of connected applications. Plus it provides integrated access to other MS software on the cloud; i.e. SharePoint, Exchange, CRM, SQL data sevices, and will allow you to fully customize and extend those offerings in the same way that you would be able to customize and extend them if they were hosted on-premises.
At the Archtect Insight Conference last year they mentioned that they have started to alter core server products to deal with the large scale failover environment which is very interesting to me at least.
Its bunch of stuff that is coming into the Cloud. I think of this as more of Platform in the Cloud.
Sql Server
CRM
MOSS
Exchange
BizTalk
Geneva (identity)
The terms that are mentioned here are "STORE" and "COMPUTE"
For me this get really intersting around the IDEA of a Internet Service Bus.
It is also about moving to the development workflow process too.
OSLO DSLs and Qudrant - Moving to a Model Driven View
Entity Framework - giving developers strong typed model in code at a click of button
ADO Data Services and Data Dynamic Webtemplates using MVC
Then with the Azure Templates and the new "WebRoles" moving to deployment of the applications to the Cloud.
Then for the Admins one click provisioning of servers is awsome.
On the Data Privacy Rules... which is the one big elephant in the room and has been mentioned... Typically there is the often a ruling in each Country about information security.
UK RIPA
US Patriot Act
Are these really conceptully different? And these 2 countries do share information anyway...IMHO (legally they are different, but to a customer both laws give access to customer data its just question of who)
At this point, information on Windows Azure is pretty scarce. I was in the keynote during the announcement, and my best guess at this point is that they're trying to provide a more extensive virtualization environment than simply hosted IIS instances.
At this point, though, I can't say more than that.
We use S3 for storage very successfully and I've always kept an eye on EC2 for Windows and SQL Server support. So now these are available I dug further.
I was pretty worried when I read this:
http://www.brentozar.com/archive/2008/11/bad-storage-performance-on-amazon-ec2-windows-servers/
Perhaps, as we're developing what will hopefully become a very popular website, we should be considering the new data store models - Azure's or Amazon's SimpleDB. Hmmmmm - complete rewrite!
The major difference going forward is that Amazon EC2 is free from today Nov 1, Check this out.
http://www.buzzingup.com/2010/10/amazon-announces-free-cloud-services-for-new-developers/