Installation and the First Query - Neo4j Essentials - page 21

Configuring a Neo4j cluster on Linux/Unix
Let's perform the following steps to install Neo4j Enterprise Edition on Linux:
1. Download and install Oracle Java 7, available at http://www.oracle.com/technet-
work/java/javase/install-linux-self-extracting-138783.html or Open JDK 7, avail-
able a t https://jdk7.java.net/download.html .
2. Set JAVA_HOME as the environment variable using the following command in
your Terminal:
export JAVA_HOME=<Path of Java install Dir>
3. Download the stable release of the Linux distribution neo4j-enter-
prise-2.1.5-unix.tar.gz from http://neo4j.com/download/other-releases/ .
4. Once downloaded, extract the archive into any of the selected folders and let's refer
to the top-level extracted directory as NEO4J_HOME .
5. Open <$NEO4J_HOME>\conf\neo4j-server.properties and enable/
modify the following properties:
◦ "#org.neo4j.server.database.mode=HA" : This property al-
lows us to keep this value as HA . You can run it as standalone too by
providing the value as SINGLE .
◦ "#org.neo4j.server.webserver.address=0.0.0.0" : This
property allows us to enable and provide the IP of the node to enable re-
mote access.
6. Open <$NEO4J_HOME>\conf\neo4j.properties and enable/modify the
following properties:
◦ "#ha.server_id=" : This is the unique ID of each node that will parti-
cipate in the cluster. It should be an integer (1, 2, or 3).
◦ "#ha.cluster_server=192.168.0.1:5001" : This is the IP ad-
dress and port for communicating cluster status information with other in-
stances.
◦ "#ha.server=192.168.0.1:6001" : This is the IP address and port
of the node for communicating transactional data with other instances.
◦ "#ha.initial_hosts=192.168.0.1:5001,192.168.0.2:5001 ":
This is a comma-separated list of the host port ( ha.cluster_server ),
where all the nodes will be listening. This would be the same for all the
nodes participating in the same cluster.