Elasticsearch
Elasticsearch Overview
Elasticsearch is a distributed, open-source search and analytics engine built on top of Apache Lucene. It is designed for horizontal scalability, real-time search, and structured/unstructured data analysis. Commonly used for log aggregation, full-text search, and analytics, Elasticsearch powers applications like observability platforms, e-commerce search, and enterprise data tools.
⚙️ Key Features
Full-Text Search
Powerful and fast full-text search with advanced query DSL, scoring, and relevance tuning.Real-Time Indexing & Search
Data becomes searchable within seconds of indexing, ideal for logs, metrics, and monitoring.Horizontal Scalability
Easily scale across nodes with sharding and replication for fault tolerance and high availability.JSON over REST API
Intuitive RESTful API using JSON for indexing, querying, and cluster management.Aggregation Framework
Analyze structured data with metrics, histograms, time series, and more.Built-In Security (with X-Pack)
Role-based access control, TLS encryption, API key support, and auditing.Kibana Integration
Visualize and interact with Elasticsearch data using Kibana dashboards.Extensible and Pluggable
Add custom plugins or use features like ingest pipelines, analyzers, and tokenizers.
🔍 Use Cases
- Log and event data analysis (e.g., ELK stack)
- Site-wide or product search in web applications
- Real-time business intelligence dashboards
- Security analytics and threat detection
- Application performance monitoring (APM)