elasticsearch lucene

;Lucene_version represents the version of Lucene on which Elasticsearch is based;The tagline ——— contains the first tagline of Elasticsearch: "You are Know, for Search". Ii. Rich-text versionBeginners can start with the rich-text version of Elastisearch. RTF is the abbreviation for ready to fly, which is an integrated basic plug-in (such as service encapsulation

Full-text Search is the most common demand, Open-source Elasticsearch is currently the first choice of Full-text search Engine.It's at the bottom of the open Source Library lucene, But we can't use Lucene directly. You must write the code yourself to invoke its interface.The Elasticsearch is a

Directory (?) [+]Open Source Search engine evaluation: Lucene Sphinx elasticsearch Open Source Search engine program has 3 major categories Lucene System, Java development, including SOLR and Elasticsearch Sphinx, C + + development, simple and high performance Xapian, C + + development Search Engi

[Elasticsearch] control relevance (2)-The PSF (Practical Scoring Function) in Lucene is upgraded during Query Practical Scoring Function in Lucene For Multiterm Queries, Lucene uses the Boolean Model, TF/IDF, and Vector Space Model to combine them, used to collect matching documents and calculate their scores. Query

be assigned on the same node. It allows you to extend the search volume/throughput because searches can be performed in parallel on all replicas. In summary, each index can be divided into multiple shards. Each index can also be duplicated 0 times (meaning no replicas) or multiple times. Once replicated, each index will have a primary shard (the copied original shard) and a secondary shard (a copy of the primary shard). You can define the number of fragments and replicas based on the ind

Elasticsearch October 2014 briefing, elasticsearch1. Elasticsearch Updates 1.1 released Kibana 4 Beta 1 and Beta 1.1 Kibana 4 is different from Kibana in layout, configuration, and bottom-layer Chart Drawing. After learning the functional requirements of many communities based on Kibana 3, Kibana's self-Kibana 2 major change resulted in the second major change made by Kibana 3. Kibana has always been commit

I. Introduction of Lucene1. About LuceneThe most popular open source full-Text search engine Development toolkit for Java . Provides a complete query engine and indexing engine, partial text word breaker (English and German two Western languages). Lucene's goal is to provide software developers with an easy-to-use toolkit to facilitate full-text retrieval in the target system, or to build a complete full-text search engine on this basis. is Apache sub-project, URL: http://lucene.apache.org/2.

processing. LUCENE,SOLR, ElasticSearch?Now the mainstream search engine is probably: Lucene,solr,elasticsearch.They are indexed based on an inverted index, what is an inverted index? WikipediaInverted index (English: Inverted index), also often referred to as a reverse index, place file, or reverse file, is an indexed method that is used to store t

:[Elasticsearch] control correlation (i)-The theory behind the calculation of the correlation degree score[Elasticsearch] Control Correlation (ii)-PSF in Lucene (practical scoring Function) and elevation during query[Elasticsearch] Control Correlation (iii)-Adjustment of correlation by query structure and boosting quer

1.ElasticSearch Simple DescriptionA.elasticsearch is a Lucene-based search server with distributed multiuser capabilities, Elasticsearch is an open source project (Apache License terms) developed in Java, based on a restful web interface that enables real-time search, Stable, reliable, fast, high performance, easy to install and use, and its scale-out capability

Why do I need a search engineThe purpose of the search is to quickly look for what is needed without browsing the entire site. The results should be sequential, the higher the correlation, the better the result should be. Filter to optimize the overall relevance of the search results The search cannot be too slow Because the traditional relational database can't solve this kind of problem well, it needs to introduce a special search engine. The use of Elasti