Back up configuration information
All Splunk's configuration information is contained in configuration files. To back up the set of configuration files, make an archive or copy of $SPLUNK_HOME/etc/. This directory, along with its subdirectories, contains all the default and custom settings for your Splunk install, and all apps, including saved searches, user accounts, tags, custom source type names, and other configuration information.
Copy this directory to a new Splunk instance to restore. You don't have to stop Splunk to do this.
http://docs.splunk.com/Documentation/Splunk/7.1.0/Admin/Backupconfigurations
please advice is there a way to configure HA in Search head itslef without clustering
HA - high availability comes with Clustering OR load balancing.
... View more