ELK 設置定時清理腳本清理索引
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2025-04-04
白話Elasticsearch11-深度探秘搜索技術之基于tie_breaker參數優化dis_max搜索效果
文章目錄
概述
官方文檔
例子
tie_breaker
概述
繼續跟中華石杉老師學習ES，第十一篇
課程地址： https://www.roncoo.com/view/55
官方文檔
https://www.elastic.co/guide/en/elasticsearch/guide/current/_tuning_best_fields_queries.html
https://www.elastic.co/guide/en/elasticsearch/reference/7.2/query-dsl-dis-max-query.html
例子
數據同 上篇博文 構造索引的DSL
這次我們使用dis_max查詢 java beginner , DSL如下
GET /forum/article/_search { "query": { "dis_max": { "queries": [ { "match": { "title": "java beginner" } }, { "match": { "content": "java beginner" } } ] } } }
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返回
{ "took": 2, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": 5, "max_score": 1.0341108, "hits": [ { "_index": "forum", "_type": "article", "_id": "3", "_score": 1.0341108, "_source": { "articleID": "JODL-X-1937-#pV7", "userID": 2, "hidden": false, "postDate": "2017-01-01", "tag": [ "hadoop" ], "tag_cnt": 1, "view_cnt": 100, "title": "this is elasticsearch blog", "content": "i am only an elasticsearch beginner" } }, { "_index": "forum", "_type": "article", "_id": "2", "_score": 0.93952733, "_source": { "articleID": "KDKE-B-9947-#kL5", "userID": 1, "hidden": false, "postDate": "2017-01-02", "tag": [ "java" ], "tag_cnt": 1, "view_cnt": 50, "title": "this is java blog", "content": "i think java is the best programming language" } }, { "_index": "forum", "_type": "article", "_id": "4", "_score": 0.79423964, "_source": { "articleID": "QQPX-R-3956-#aD8", "userID": 2, "hidden": true, "postDate": "2017-01-02", "tag": [ "java", "elasticsearch" ], "tag_cnt": 2, "view_cnt": 80, "title": "this is java, elasticsearch, hadoop blog", "content": "elasticsearch and hadoop are all very good solution, i am a beginner" } }, { "_index": "forum", "_type": "article", "_id": "5", "_score": 0.7116974, "_source": { "articleID": "DHJK-B-1395-#Ky5", "userID": 3, "hidden": false, "postDate": "2019-05-01", "tag": [ "elasticsearch" ], "tag_cnt": 1, "view_cnt": 10, "title": "this is spark blog", "content": "spark is best big data solution based on scala ,an programming language similar to java" } }, { "_index": "forum", "_type": "article", "_id": "1", "_score": 0.4889865, "_source": { "articleID": "XHDK-A-1293-#fJ3", "userID": 1, "hidden": false, "postDate": "2017-01-01", "tag": [ "java", "hadoop" ], "tag_cnt": 2, "view_cnt": 30, "title": "this is java and elasticsearch blog", "content": "i like to write best elasticsearch article" } } ] } }
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不知道為啥id=3的相關度是最高的… 如果有知道的，煩請不吝賜教。
dis_max只取某一個query最大的分數，完全不考慮其他query的分數
tie_breaker
使用tie_breaker將其他query的分數也考慮進去
tie_breaker參數的意義，在于說，將其他query的分數，乘以tie_breaker，然后綜合與最高分數的那個query的分數，綜合在一起進行計算，除了取最高分以外，還會考慮其他的query的分數。
tie_breaker的值，在0~1之間，是個小數。
GET /forum/article/_search { "query": { "dis_max": { "queries": [ { "match": { "title": "java beginner" } }, { "match": { "content": "java beginner" } } ], "tie_breaker": 0.7 } } }
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返回結果
{ "took": 2, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": 5, "max_score": 1.344432, "hits": [ { "_index": "forum", "_type": "article", "_id": "2", "_score": 1.344432, "_source": { "articleID": "KDKE-B-9947-#kL5", "userID": 1, "hidden": false, "postDate": "2017-01-02", "tag": [ "java" ], "tag_cnt": 1, "view_cnt": 50, "title": "this is java blog", "content": "i think java is the best programming language" } }, { "_index": "forum", "_type": "article", "_id": "4", "_score": 1.1365302, "_source": { "articleID": "QQPX-R-3956-#aD8", "userID": 2, "hidden": true, "postDate": "2017-01-02", "tag": [ "java", "elasticsearch" ], "tag_cnt": 2, "view_cnt": 80, "title": "this is java, elasticsearch, hadoop blog", "content": "elasticsearch and hadoop are all very good solution, i am a beginner" } }, { "_index": "forum", "_type": "article", "_id": "3", "_score": 1.0341108, "_source": { "articleID": "JODL-X-1937-#pV7", "userID": 2, "hidden": false, "postDate": "2017-01-01", "tag": [ "hadoop" ], "tag_cnt": 1, "view_cnt": 100, "title": "this is elasticsearch blog", "content": "i am only an elasticsearch beginner" } }, { "_index": "forum", "_type": "article", "_id": "5", "_score": 0.7116974, "_source": { "articleID": "DHJK-B-1395-#Ky5", "userID": 3, "hidden": false, "postDate": "2019-05-01", "tag": [ "elasticsearch" ], "tag_cnt": 1, "view_cnt": 10, "title": "this is spark blog", "content": "spark is best big data solution based on scala ,an programming language similar to java" } }, { "_index": "forum", "_type": "article", "_id": "1", "_score": 0.4889865, "_source": { "articleID": "XHDK-A-1293-#fJ3", "userID": 1, "hidden": false, "postDate": "2017-01-01", "tag": [ "java", "hadoop" ], "tag_cnt": 2, "view_cnt": 30, "title": "this is java and elasticsearch blog", "content": "i like to write best elasticsearch article" } } ] } }
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Elasticsearch 數據接入服務 DIS
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版權聲明：本文內容由網絡用戶投稿，版權歸原作者所有，本站不擁有其著作權，亦不承擔相應法律責任。如果您發現本站中有涉嫌抄襲或描述失實的內容，請聯系我們jiasou666@gmail.com 處理，核實后本網站將在24小時內刪除侵權內容。
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