Analyzers, Tokenizers, and the Inverted Index
Learn how Elasticsearch turns text into searchable tokens using analyzers and stores them in an inverted index.
From Text to Tokens
Before text is searchable, an analyzer breaks it into tokens and stores them in an inverted index. That's the first step of every search.
The Inverted Index
An inverted index maps each token to the documents that contain it — like a book's index — making full-text lookups extremely fast.
All lessons in this course
- What is Full-Text Search?
- Elasticsearch Core Concepts
- Setting Up Your First Cluster
- Analyzers, Tokenizers, and the Inverted Index