a software tool that is used to collect data from different servers and convert it to useable/readable data.

A Splunk Enterprise instance that indexes data, transforming raw data into events and placing the results into an index. It also searches the indexed data in response to search requests

Forwarder, indexer and Searchhead

a component of Splunk that collects data at the source and sends it to the indexer to be categorized.

A program that stores data in some format and provides a way to extract that data.

The forwarder collects the data at the source, then it gets to the indexer where it is filtered, and stored in indexes as events. Then the searchhead is able to search the data that has been indexed.

provide data processing and storage for local and remote data and host the primary Splunk data store

Oracle + MySql.