What settings can be adjusted in the Splunk indexer configuration?

Data retention policies are crucial settings that can be adjusted in the Splunk indexer configuration. These policies define how long indexed data is retained before it is automatically deleted or rolled off. In Splunk, these settings help manage storage efficiently and ensure that only relevant data is kept accessible for search and analysis purposes. Administrators can set parameters that determine the lifespan of data based on its age or size, thus allowing organizations to balance data accessibility with storage constraints.

Other options mentioned—search head clustering settings, user authentication methods, and dashboard visualization options—are part of different configurations in Splunk. Search head clustering pertains to settings that manage how searches are distributed among clustered search heads, while user authentication relates to identity verification and access control. Dashboard visualization options deal with how data is presented to users but do not influence the underlying data management processes within the indexer, which is where data retention policies are specifically managed.