Elasticsearch Tutorial: Core Concepts of Indices, Documents, and Query APIs

Elasticsearch (ES) is an open-source search engine built on Apache Lucene. It is the go-to solution for full-text search, capable of storing, searching, and analyzing massive volumes of data in near real-time. Companies like GitHub and Stack Overflow use it at scale. ## Core Concepts: ES vs. Relational DatabasesSVG Image If you come from a relational database background, the following mapping will help you understand ES terminology quickly: