Databases Intermediate

What is Elastic Search?

A distributed search and analytics engine built on Apache Lucene, optimized for full-text search and log analysis.

Elasticsearch indexes documents as JSON and provides powerful full-text search with relevance scoring. It supports fuzzy matching, aggregations, geospatial queries, and auto-completion. The ELK Stack (Elasticsearch, Logstash, Kibana) is the standard for log analysis.

Use cases include website search, application monitoring, security analytics, and business intelligence. Elasticsearch scales horizontally across clusters of nodes.

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Related Terms

A category of databases that store data in non-tabular formats, optimized for specific data models and access patterns.

Prepared Statement

A pre-compiled SQL template that uses parameters instead of literal values, preventing SQL injection and improving performance.

The process of copying and maintaining database data across multiple servers for redundancy, failover, and read scaling.

Structured Query Language — the standard language for managing and querying data in relational databases.

Connection String

A formatted string containing all parameters needed to establish a connection to a database server.

A data structure that improves the speed of data retrieval operations on database tables at the cost of additional storage.

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