How deeply does Elasticsearch in Action, Second Edition cover Lucene?

Defines a Java full-text search library and API-based integration, without detailing indexing internals.

Lucene

As explained in Elasticsearch in Action, Second Edition

Apache Lucene is an open-source Java library for information retrieval and full-text search.

Apache Lucene is an open-source Java library for full-text search. Applications import it and integrate with it through programming interfaces rather than running it as a complete search application. section 1.3.2 section 3.1

Lucene supplies the search foundation for several widely used engines:

Elasticsearch wraps Lucene as its core full-text search library and adds a distributed, scalable server-side application. section 3.1
Apache Solr is an open-source search engine built on Lucene. section 1.3.2
OpenSearch is included among search engines built on Apache Lucene. section 1.3.2

Choosing the integration level

A team building full-text search can integrate Lucene directly through its APIs, or use Elasticsearch, which exposes Lucene-backed search through a language-agnostic server and RESTful interfaces. section 1.3.2 section 1.7

How Elasticsearch in Action, Second Edition covers it

Cover of Elasticsearch in Action, Second Edition

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Also explained in

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MongoDB 8.0 in Action, Third EditionApache Lucene is an open-source Java information-retrieval library that provides indexing and search capabilities for text and other data.
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Effective Conversational AIApache Lucene is an open-source search library that provides text indexing and information-retrieval capabilities.

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Related concepts

Elasticsearchused by · Elasticsearch is a distributed search and analytics engine that indexes data for searching, retrieval, and analysis.
inverted indeximplements · An inverted index is a data structure that maps terms or tokens to the documents, records, or locations in which they occur.
Atlas Searchused by · Atlas Search is MongoDB Atlas's embedded full-text search capability, built on Apache Lucene and supporting features such as scoring and faceting.
mongotused by · mongot is the MongoDB process that maintains Atlas Search indexes, tracks database changes, and processes Atlas Search queries alongside mongod.
full-text search enginekind of · A full-text search engine is software that indexes textual content and retrieves documents according to their textual relevance.
replicaincludes · A replica is a copy of data or state, or an equivalent running instance of a component, maintained alongside others in a replicated system.

This explainer was generated by Manning's knowledge graph from the text of Elasticsearch in Action, Second Edition. The section links point to the parts of the book it draws on.