You can select the indexes to back up for the Splunk Cluster.
From the navigation pane, go to Protect > Big data.
The Big data page appears.
Click on the Splunk cluster.
The cluster details page appears.
Click on the subclient.
On the Configuration tab, in the Content section, click Edit.
Click Browse to select the indexes for backup.
To remove an index already selected for backup, select the index, and then click Remove.