You need two Conductor Live nodes to implement Conductor Live node redundancy. Otherwise, you need only one node.
We recommend that you set up the cluster with redundant nodes. If you do, you obtain resiliency in the Conductor Live nodes. In addition, there are some resiliency features available to Elemental Live and Elemental Statmux that only apply if you have redundant Conductor Live nodes.
Redundant Conductor Live nodes are known as a high availability (HA) pair.
To set up redundant nodes, add two nodes to the cluster, then create an HA redundancy group. When a problem occurs on the active node, the backup node automatically takes over control of activity in the cluster.
How Failover works
If the leader node fails, the backup automatically takes over management of the cluster. The leader Conductor Live maintains the Conductor Live database; the backup database is a copy of that leader database and is continually being synchronized. The backup Conductor Live is continually monitoring the leader.
As soon as the backup can no longer detect the leader on the network, it assumes that the leader has failed and its takes over the leader role. This change in role takes a few seconds.
.If you resolve the problem with the failed leader Conductor Live node and bring it back into the cluster, that leader node will take back control from the secondary Conductor Live node.
