Hi Gurus

Suppose i have a requirement that the SharePoint server should be able to handle 3M connections and the system high availability target is 99.99%.

How to make sure the system can meet this requirement?

3 million concurrent connections? Seems awfully high.

Anyhow, start by taking a look at this, then refine what you want to ask here:

https://technet.microsoft.com/en-us/library/cc748824.aspx