Programmer Think

I. ElasticSearch document score_ Underlying principle of score calculation 1.1 step 1: boolean model According to the user's query conditions, the doc containing the specified term is filtered out first query "hello world" --> hello / world / hello & world bool --> must/must not/should --> filter --> contain / Not included ...

2021SC@SDUSC 1. .dvd and dvm file . dvm stores the metadata of DocValue field, such as DocValue offset. . dvd stores DocValue data. stay Solr4.8.0 In, dvd as well as dvm Used Lucene The encoding format is Lucene45DocValuesFormat. Similar to the previous file format, it contains Lucene45DocValuesProducer And Lucene 45docvaluesconsumer to ...

term query introduce Returns the document that contains the exact value in the field provided. You can use term queries to find documents based on precise values such as price, product ID, or user name. Note: avoid using term queries on text fields. No results will be found For example: GET /_search { "query": { "term": { ...

2021SC@SDUSC I Segments_N file An index corresponds to a directory, and the index files are stored in the directory. The index file of Solr is stored in the core/data/index directory under Solr/Home, and one core corresponds to one index. Segments_N All valid indexes are enumerated segments Information and the specific information to be dele ...

* lucene-plus relies on spring-boot 2.xx implementation, and students using spring or other spring-boot projects can adjust the source code, source coordinates according to their needs: lucene-plus: Enjoy lucene's silky operation by encapsulating common CRUD s based on lucene. In principle, it is not recommended to download the source code dir ...