Neo4j supports high-availability (HA) master/slave clustering. To set up an HA Neo4j cluster, build the desired number of instances as if they were single-server installs. Then, adjust or add the following properties in the conf/neo4j.conf file:
ha.server_id=1ha.initial_hosts=192.168.0.100:5001,192.168.0.101:5001,192.168.0.102:5001dbms.mode=HA
Each Neo4j instance in your cluster must have a unique ha.server_id. It must be a positive number. List each IP address with its HA port (5001 by default) in the ha.initial_hosts property. Host names can also be used here. The property defaults to single, and should be set to HA for an HA cluster.
Each instance of Neo4j can now be started in any order.
