https://community.appian.com/discussions/f/administration/14211/on-premise-appian-high-availability-18-04When setting up Appian to be HA on premise following the instructions in: https://docs.appian.com/suite/help/18.4/How_to_Set_Up_High_Availability_Installations.html how fault resistant is the setup. If Appian is running on 3 servers as recommendeden-USTelligent Community 12https://community.appian.com/thread/64273?ContentTypeID=1Mon, 28 Jan 2019 15:25:59 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:aa867336-c96d-4fa2-940a-24a92e71ee0fEliot GersonThe architecture is robust to a failure of one of the instances. As you&#39;ve gathered, 2 instances need to be available in order to establish a consensus. It sounds like you have a pretty good understanding of this topic already, but if you&#39;re interested in learning more, I would recommend reading about the CAP theorem.<div style="clear:both;"></div>