A monitor has been created in inputs.

When dealing with a directory containing a mix of file types, it's essential to fine-tune the sourcetypes for different files to ensure accurate data parsing and indexing.

B. On the forwarder collecting the data, leave sourcetype as automatic for the directory monitor. Then create a props.conf that assigns a specific sourcetype by source stanza: This is the correct answer. In this approach, the Universal Forwarder is set up with a directory monitor where the sourcetype is initially left as automatic. Then, a props.conf file is configured to specify different sourcetypes based on the source (filename or path). This ensures that as the data is collected, it is appropriately categorized by sourcetype according to the file type.

Splunk Documentation References:

Configuring Inputs and Sourcetypes

Fine-tuning sourcetypes