Options for real-time web notifications and updates using Comet/XMPP vs WebSocket technologies on a Microsoft stack?

Question

I am scoping out the architectural options for a project that will render live updates (like Facebook) of user activities - logins, photos, etc. Two main UI components of t

Answer 1

WebSync v4 uses WebSockets in addition to falling back to long-polling/callback-polling as needed. The WebSockets in WebSync are all over standard HTTP ports as well, so there won't be any issues with routers/filrewalls/etc.

On a "normal" system, you should see ~20k concurrent (per node) and ~100k messages/sec. Those are very rough numbers though, as it depends drastically on your system and the types of messages you're sending, etc. We've seen as high as 50k users (per node) and (in a different test) 300k messages/second.

(Disclaimer: I work for Frozen Mountain)