- Use - hostname -fto identify the FQDN for all the host machines.![[Note]](../common/images/admon/note.png) - Note - If you are deploying on Amazon EC2, use the Internal FQDN. 
- On the master-install-location, change directory to - master-install-location/gsInstaller.
- Create the following flat text files: ![[Note]](../common/images/admon/note.png) - Note - The mandatory files are required for minimal install (Apache Hadoop core components). The optional files are needed if you wish to install that component (for example, HBase, Hive, WebHCat, etc.) in your cluster. - Mandatory files: gateway, namenode, snamenode, jobtracker, nodes ![[Note]](../common/images/admon/note.png) - Note - The - nodesfile is used to define the DataNodes and TaskTrackers.
- Optional files: hbasemaster, hivemetastore, webhcatnode, nagiosserver, gangliaserver, oozieserver, hbasenodes, zknodes ![[Note]](../common/images/admon/note.png) - Note - The - hbasenodesfile is used to define the RegionServers for your HBase cluster.
 
- Provide FQDN of your host machines in each these text files: - Option I (single node installations): Provide the FQDN of the same host machine for all of the text files. 
- Option II (multi node installations): - For the following files, provide FQDN of EXACTLY one host machine: - gateway,- namenode,- snamenode,- jobtracker,- hbasemaster,- hivemetastore,- oozieserver,- webhcatnode,- nagiosserver,- gangliaserver.
- For the following files, provide FQDN (separated by a new-line character) for a MINIMUM of three host machines:: - nodes,- hbasenodes
- For the - zknodesfile, provide FQDN for a MINIMUM of one host machine. Ensure that multiple host machines follow the Zookeeper ensemble rule.
 
 


