Is There a Master Slave in Elastic Search?

Elastic search head had changed their language around the master slave relationship. There wasn't much controversy about making a change, because there is no change to be made as a new system. We don't need to drop everything and cino demonize our past, just like we've used master slave before. It doesn't mean we need to go excise it from the full history of things that we've done. But we can gradually evolve our way forward and shed the baggage as we go.