程序员基础掌握得好学新东西真的就快么？

Lucene/ ElasticSearch这类的搜索引擎和SQL数据库里的查询/全文检索有什么区别？

elasticsearch（lucene）可以代替NoSQL（mongodb）吗？

The second optimization we used was to replicate large portions of our Datastore data into ElasticSearch. ElasticSearch is a fundamentally different storage technology to Datastore, and is not a managed service, so it was a big leap for us.

Deep Learning for Search - teaches you how to leverage neural networks, NLP, and deep learning techniques to improve search performance. (2019) Relevant Search: with applications for Solr and Elasticsearch - demystifies relevance work. Using Elasticsearch, it teaches you how to return engaging search results to your users, helping you understand and leverage the internals of Lucene-based search engines. (2016)

Elasticsearch with Machine Learning (English translation) by Kunihiko Kido Recommender System with Mahout and Elasticsearch

Como construir uma stack ELK sem dor de cabeça

When a document is deleted or updated (= delete + add), Apache Lucene simply marks a bit in a per-segment bitset to record that the document is deleted. All subsequent searches simply skip any deleted documents.

Will ich ein Feld abfragen, das sich nicht auf der obersten Ebene der geschachtelten JSON-Daten befindet, muss ich es über den Pfad identifizieren, das heißt ich gebe die Felder an, in denen das Feld eingebettet ist. Beispielsweise professionOrOccupation.label in folgenden Daten

Running these queries on a field with many unique terms can be resource intensive indeed. Avoid using a pattern that starts with a wildcard (for example, *foo or, as a regexp, .*foo).

Sense is a Kibana app that provides an interactive console for submitting requests to Elasticsearch directly from your browser.

listen(User, 'before_insert', generate_license)

UI components for ElasticsearchThe easiest way to build a great search experience with Elasticsearch.