What happens to configuration files when Splunk starts?

When Splunk starts, it processes the configuration files and merges them into a single run-time model. This merging allows Splunk to combine settings from various configuration files, which can reside in different directories and have different scopes, into a unified configuration that the system uses to operate.

By doing this, Splunk can effectively manage and apply all configurations relevant to its various functionalities, including indexing, data input, search processing, and more. This run-time model reflects the final set of configurations that Splunk will use during its operation, ensuring that the system reflects the most up-to-date settings specified across all configuration files.

The other choices do not accurately reflect the behavior of Splunk during startup. For instance, configuration files are certainly not ignored, as that would prevent Splunk from functioning with the necessary settings. They are neither copied to another directory nor archived for backup, as the system actively utilizes these files rather than creating duplicates or backups upon startup.