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안녕하세요! 오늘은 Elasticsearch가 왜 일반 DB보다 검색이 빠른지, 그 핵심 원리를 파헤쳐볼게요.DB vs Elasticsearch 검색 방식 비교 🤔일반 DB의 검색 방식SELECT * FROM books WHERE content LIKE '%elasticsearch%'테이블의 모든 row를 순차적으로 스캔 (Full Table Scan)마치 도서관에서 모든 책을 한권씩 펼쳐보는 것과 같아요!Elasticsearch의 검색 방식GET /books/_search{ "query": { "match": { "content": "elasticsearch" } }}미리 만들어둔 역색인(Inverted Index)을 통해 즉시 검색도서관의 색인 카드처럼, 단어별로 어디에 있는..

An inverted index is a data structure that maps terms to the documents that contain them, making it crucial for ElasticSearch because it allows for rapid full-text searches.Inverted Index: The Core ConceptImagine you have a collection of books, and you want to find all the books that contain the word "quantum." Instead of scanning each book from start to finish, you could create an index that te..

ElasticSearch is a distributed search engine that can quickly find information within large datasets, similar to how you might find a book in a vast library using an advanced catalog system.The Big PictureImagine you have a giant library with millions of books, and you need to find all the books that mention "quantum physics" within seconds. Doing this manually would be nearly impossible. Elasti..