Well, to repeat - how does this compare to tools in the domain? Why are you opting for a web interface driven approach over a command line interface?
Why are you opting to build the entire thing from scratch instead of using an existing orchestration tool and building an interface to that? Wouldn't that save you time and money?
I've most recently hammered on mcollective, and it can easily support multiple users, parallel requests, full auditing of all requests and responses, authorization, server discovery, etc. There's all your advanced features, already implemented.
Did the creators of this use any of the tools in this domain? How does this compare to mcollective/capistrano/vlad the deployer/fabric/ssh and a for loop? It's a web app, how is that superior to something CLI based?
Why are you opting to build the entire thing from scratch instead of using an existing orchestration tool and building an interface to that? Wouldn't that save you time and money?
I've most recently hammered on mcollective, and it can easily support multiple users, parallel requests, full auditing of all requests and responses, authorization, server discovery, etc. There's all your advanced features, already implemented.