True or False: Hiera data file names must match the case-sensitive format according to their matching values.

The correct response reflects the essential design of Hiera, which is to ensure that data retrieval is consistent and accurate based on a hierarchical lookup system. Hiera uses a case-sensitive approach for matching file names, which means that the names of Hiera data files must align exactly, in terms of case (uppercase vs. lowercase), with the specified keys in your Puppet manifests or other configuration files.

This case sensitivity is crucial because if there's a mismatch in the case between the requested value and the actual data file name, Hiera will not be able to locate the correct data. For instance, if a data file is named Authentication.yaml and the lookup key is authentication, Hiera would not find the file due to the case discrepancy.

Understanding this case-sensitive behavior is vital when structuring your Hiera data, as it directly influences how data is resolved during Puppet runs. This knowledge is fundamental for troubleshooting and ensuring that the expected data is correctly sourced during operational deployments.