Learn ElasticSearch to Lose your Brain Virginity 

So i was installing and configuring the Wazuh app to meet a few requirements of PCI/DSS.

Wazuh App is a complete SIEM that fulfills a few requirements of PCI/DSS, Moreover, it gives you recommendations about your System, Network, and other security measures as recommended by PCI/DSS.

The beauty of the Wazuh App is that it's free, comprehensive, and easy to deploy. Managing Wazuh app is something Else!

Here is the Link for review at your own risk.

Wazuh Installation Guide

Wazuh is deployed on top of ELK Stack, which is the recommended solution for managing large data files. Elastic is a search engine, a fast and recommended one to visualize large data.

Elastic Search Stores data in the form of indices, and visualize in a kibana dashboard.

Mostly there is very less help available regarding the elasticsearch. 

if your plan is to learn Big Data do a give look at the elasticsearch