Raspberry pi failover with Owncloud

Hello guys. My college group is wondering how get a raspberry pi failover cloud with owncloud. We saw some posts here and most of them was saying that was not possible. We want to know if this new version allow us to do a two raspberry pi working in a failover environment with owncloud.

As far as I understand from following link, you can only use two server behind a load balancer. https://doc.owncloud.org/server/latest/admin_manual/installation/deployment_recommendations.html .