Connection Limit


We are develop a project with openfire server.

I see the openfire server support +100.000 concurrent connection.

My project i hope have + 5.000.000 connections.

Support Openfire to many millions of client connections?

If we put connection mannagers, the xmpp client need to connect to connection mannager ip or connect to openfire server and openfire server mannages connection betwen connection mannager?

Wich is the hardware requeriments to suppor millions of users?

I see Wahtsapp have millios of users and i see in internet that the only have a server with 24 cores and 32 gb of ram.