Elasticsearch is a highlyscalable and full-text search open source RESTful searching, indexing, and analytics engine developed on top of Lucene. It is one of the most popular search engines for building enterprise applications today. It can save, search, and analyze data in big volumes very quickly. Mainly, it is used for applications where complex searching is required.
It is developed in Java and provides near real-time results. It is designed to work in a distributed environment to provide high availability and scalability. It is document-oriented, stores complex entity structures in JSON format, and provides a web interface to interact with.
Elasticsearch is mainly used in applications when searching for a large amount of matching products (for example, e-Commerce), using auto-complete features for partially typed input, or analyzing the huge quantities of raw data stored in a distributed fashion.