Relevance Scoring

Tencent Music Tech Team

Jan 4, 2022 · Big Data

Elasticsearch Fundamentals: Architecture, Indexing, Query DSL and Search Mechanics

Elasticsearch is a distributed, schemaless search engine built on Lucene that stores JSON documents in sharded indexes, uses immutable segments and merges, provides a flexible Query DSL with aggregations and relevance scoring, and executes distributed query‑then‑fetch searches with features like scrolling, optimistic locking, and zero‑downtime reindexing.