ELK - Elastic Stack

• A search engine at heart, users started using Elasticsearch for logs and wanted to easily ingest and visualize them. Enter Logstash, the powerful ingest pipeline, and Kibana, the flexible visualization tool.
• The Elastic Stack lets you reliably and securely take data from any source, in any format, and search, analyze, and visualize it in real time.

Elasticsearch

• Elasticsearch is a distributed, JSON-based search and analytics engine designed for horizontal scalability, maximum reliability, and easy management.