I once created a proof of concept using the Windows Azure AppFabric Service Bus (then it was called the .NET service bus). It allows secure communication between on-premise systems and the applications living in Windows Azure.
Here is some information about the Appfabric Service Bus: http://www.microsoft.com/windowsazure/appfabric/overview/#top
I was surprised how easy it was. It's just like implementing a WCF service and client using a different type of binding. I should have the sample code somewhere, I will have to look that up. I'm not sure, but I even think you can use PIWebServices using this system, but I haven't tried this. Else you can create a simple (WCF) AppFabric Service Bus using PISDK.
I think using the AppFabric Service Bus is the best option for something like this, I will try to get my sample code posted as soon as I can
Great idea by the way!
@Lonnie: I understand this is mostly a PoC/learning experience, but beyond the technical aspect of this (which I'll let true experts answer ) I am interested in the use cases for this. As you already have heard at our Users Conference and a few times on vCampus (including Ahmad Fattahi's blog post and Richard Beeson's blog post), OSIsoft is looking into what role the Cloud will play in the PI System roadmap - as such, I would like to invite you to share your thoughts about what you think we should address or not address, your concerns, etc.
I know you shared some on Ahmad's blog post, but please do not hesitate to share more as you learn more on the topic!
@Michael Thanks for the information. I have plans to setup a worker role in appfabric to do the processing, including security. I figure on using tablespace for storing user information. I don't know how I'm going to cache at this point, I might just do something really simple. The great thing I have read about appfabric is that is scales very well. I'm not very clear on how I will connect to my PI server, but will be trying in over the next week or so once my server is up.
@Steve The best use case I can think of is one that will pay very well j/k (well, not really I guess ). My idea now is more to create a framework for when someone has a need to have a lot of clients (like the public) required to connect and access PI data and the provider wants to have native apps (could even be HTML web pages) access the information real time. Mostly, in the end I see this as another option for data-access, just moved away from the on-premise model, to a cloud service model.
I do have one application that I'm writing as a demo to show the possibilities, but it is too soon to talk about it, but will hopefully have something by vCampus live.