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Ok, so you want to build real-time applications? There are ...
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Hi Chris and thanks for sharing this.
Can you elaborate on costs? This one of the main issues I've had with Azure. Yes, it can scale, if you follow the rules, and build a nearly Azure dedicated architecture.
But when it will actually ramp up to the peak of "1 million chat users", how much will that really cost if we build this app and make it go live on Azure ?
It costs about $2/day per 1000 concurrent SignalR service connections. Generally if you have 1 million users, they are not connected at once. For Functions... it costs one execution for a function to send a message via SignalR Service, no matter how many devices are connected.
I did the maths to check, I may be wrong, please correct me if so.
I have used the Azure Pricing calculator.(azure.microsoft.com/en-us/pricing/...)
Let's imagine a real case where 1 million users would connect to and send only 1 message to test the chat room on a monthly basis.
Now, SignalR :
If we sum up, for a chat room like this (which is very well done and neat, Azure is great, no doubt on that) we have 42$/month.
And as for the 1000 users/day, that's only within the limit of approx 32 messages/user/day on a monthly basis. Pass that limit and you'll need two SignalR units, doubling the price.
Moreover:
If you have more than 1000 simultaneous users, how do you plug new ones to another unit ? This would double the messages sent ?
Am I wrong ?
Hi Xavier. I've sent your question to the product team. Hope to get back to you soon :)
Hi Chris, so how did it go with the product team ?
hi Xavier. I believe Anthony's first response is accurate. We are working on revamping the page for doing calculations on Cloud costs. Hopefully, this will become easier to use quite soon
So we have 60$/month on a 1000 users/day average on a monthly basis, based on Anthony's statement.
Please keep me and readers an posterity informed:
And one last question: Is really al this about technology or is it marketing ? If so, I promess I won't ask anything anymore.
Really wish Chris finished off the thread - dealing with similar issues with signalr at the moment.
Cost issues ?
wow, appreciate you replying 2 years after the comment :)
mainly around that. We currently have a bunch of signalr pods on a single node, with a redis backplane on that same node, doing around 1 billion messages a month - imagine it's a stock trading app with price updates - but we're at a loss for scaling this out without a backplane, especially signalr onto other nodes. Have you solved an issue similar to ours? I would absolutely love just plugging into an azure service and making that headache an MS problem :P but it seems we're going to have to deal with this one on our own.
I was notified ;) I'm not the author, and no author replied to my questions neither. Seems that your problem is quite different : I was originally stating that omitting the real cost from the discussion was a bit unfair to the audience (ie marketing-like sponsored posts).
You seem to have the $$ so you may get an answer :)
That is the peculiar thing lol, we do, and we really don't want to deal with this problem - but I think it's inevitable :) and I wholeheartedly agree, the marketing-like posts are all fun and jazzy but conveniently step over a lot of the pitfalls of this stuff, especially cost. MS page advises how to scale out with redis, cautions against it (in our case) but never really offers a good alternative.
Great article!
Thank you :)
Very nice. I've been wanting to try SignalR and Vue for awhile and this article is so well-written and easy to follow, I am going to dive in. Thanks!
hi Troy. Thanks for that. Let me know if you have any questions :)