Which of the following is NOT a bucket component in Splunk?

The correct choice is based on the recognition of what constitutes a bucket component within Splunk. In the context of Splunk's indexing architecture, a bucket consists of several components relating to the storage and management of indexed data.

Raw data, for instance, refers to the original event data that is stored in the raw format within a Splunk bucket. The bucket_info.csv file provides metadata about the corresponding bucket, including information such as the bucket's status and time range. The longnumber.tsidx file is a structure that contains index data for the events stored within the bucket, helping facilitate quick searches and queries.

Contrastingly, the source_type_map is not a bucket component. Rather, it is more related to how data is categorized or identified for indexing purposes in Splunk. It helps map sources of data to their appropriate source types during the indexing process but does not pertain to the physical structure or components found within a bucket.

Understanding these components and their roles is critical for effectively managing and optimizing data within Splunk's indexing framework.