What is Elasticsearch used for?

Elasticsearch is used as a distributed search engine and analytical database. Its main applications:

• Real-time search: Indexing and searching large volumes of structured and unstructured data.
• Data analytics: Aggregation and visualization of data to gain insights (e.g., logs, application metrics).
• Logging and monitoring: Collection, storage, indexing, and analysis of logs from various sources (Logstash) and metrics (Metricbeat), often in conjunction with Kibana for visualization (ELK Stack).
• Full-text search: Powerful capabilities for searching text fields with support for language features and relevance.
• BI and reporting: Building dashboards and reports based on data stored in Elasticsearch.

It scales horizontally, allowing to handle increasing volumes of data and search queries by adding new nodes to the cluster. It supports a RESTful API for interaction.