How concerned about load balancing do I need to be?

I’m currently working on a project which will have client applications (desktop & android & web) communicate with varies processes running on a server(s).

How to slowly release a web application to more and more users so that too many concurrent users don’t crash your site?

I have a web application that I expect to go viral pretty quickly.

How to slowly release a web application to more and more users so that too many concurrent users don’t crash your site?

I have a web application that I expect to go viral pretty quickly.

How can I test my application for load balancing?

We are looking to implement a load balancer that will serve requests between 2 IIS servers.