04-26-2015, 02:26 AM
Is that 1,000,000 players in a single world or across multiple worlds through Bungeecord? Because if its one world you're going to need to modify whatever server you use to handle it. So that means working with Mojang, or using an open source server like MCServer. What are you trying to do with it and what are you're estimated server specs? Because that many clients is at the scale where you have to look at tuning the kernel in order to handle the data, or going to a cluster, and I don't know of any server that currently supports distributing a single world across multiple servers.