Programming VIP

preface This film blog is my notes recorded by watching the video of crazy God, which is convenient for reference when needed. Video address: https://www.bilibili.com/video/BV17a4y1x7zq 1. Introduction to elasticsearch Elastic search, ES for short. ES is an open source and highly extended distributed full-text retrieval engine, whi ...

1, Simple query 1, Query all results GET /student_info/_search { "query": {"match_all": {}} } 2, Query by criteria GET /student_info/_search { "query":{ "match":{ "name":"Zhang San" } } } 3, Sort GET /student_info/_search { "query":{ "match":{ "name":"Zhang San" } }, "sort":[{ "age":"desc" } ...

1. Document analysis   analysis includes the following processes: Dividing a piece of text into independent entries suitable for inverted indexing;Unify these entries into a standard format to improve their "searchability", or recall;    when the analyzer performs the above work, it actually encapsulates three fu ...

Before we created the index and looked up the data, we used the default word segmentation device. The word segmentation effect is not ideal. We will divide the text field into Chinese characters one by one, and then segment the searched sentences when searching. Therefore, we need a more intelligent ik word segmentation device. 1.1. Instal ...

Write in front In today's Internet industry, especially in the current distributed and micro service development environment, in order to improve search efficiency and search accuracy, a large number of NoSQL databases such as Redis and Memcached will be used, as well as a large number of full-text retrieval services such as Solr and Elasti ...

1. Introduction to rocketmq 1.1MQ introduction MQ (Message Queue) Message Queue is a queue used to save message data Queue: a type of data structure characterized by "first in first out" 1.2 what is a message Service requests between servers Original architecture: In the server A Function needs to be called B , C M ...

background I've also built and experienced Elasticsearch 7 X's services and clusters, however, have been running in the Intranet environment at that time, and there is no configuration xpack related to its authentication. I remember the suggestion written at that time: because Elasticsearch does not enable the built-in security defense mechani ...

ElasticSearch getting started notes After downloading and installing ElasticSearch on the Internet, enter the directory, open cmd and run it on Windows bin\elasticsearch.bat Running on linux or other systems bin\elasticsearch If curl has been installed, to test whether ES is successfully installed, you can run the command on another cmd co ...

Simple use of search In the previous chapter, we introduced the basic use of the document. If you are interested, you can refer to it Introduction to the core concept of elasticSearch (III): addition, deletion, modification and query of documents In this chapter, we will make a simple use of search. 1, Let's delete all the indexes in ...

Original text: https://hjxlog.com/posts/20220215221548.html 1, Foreword I bought Tencent cloud server a few days ago. I happened to be learning elasticsearch recently, so I wanted to build an es cluster to play. According to the keywords, I searched several blogs on Baidu and found that the content was surprisingly similar. I had a hunch that ...