Each JobScheduler in a cluster has almost the same setup configuration. Particularly, they have the same JobScheduler Id and the same database connection. After the installation of the first JobScheduler of the cluster the file $SCHEDULER_HOME/scheduler_install.xml will be created. An easy way to install the other clustered JobScheduler is to use this file for a Batch-Installation. You must only edit the schedulerHost value in the scheduler_install.xml and in addition the clusterOptions when building a Backup Cluster. The value of databaseCreate should be set to off, as the database has already been created when the primary JobScheduler was set up.
... <entry key="schedulerHost" value="[other host]"/> ... <!-- for Backup Cluster --> <entry key="clusterOptions" value="-exclusive -backup"/> ... <entry key="databaseCreate" value="off"/> ...
Further information about the Backup Cluster configuration can be found here, about Load Balancing look here.
If you want to change the cluster option of an already installed JobScheduler then you can use the setup once more to update the installation or you change it manually (see the Cluster Operation article for more information).