Programmer Group

1, Kubernetes (k8s) k8s full name Kubernetes With the rapid development of Docker as an advanced container engine, container technology has been applied in Google For many years, Borg system has run and managed thousands of container applications. The Kubernetes project is derived from Borg, and it can be said to be the essence of Borg's d ...

1 ES data organization concept The data organization concept of ES is compared with MySQL and MongoDB as follows:( "Most popular" basis) Note that the concept of ES Index here is similar to that of MySQL database, which is easy to be confused later. What is more noteworthy is that after ES6, multiple types are not allowed in ...

ES6 New features of ES6 let & const const is used to represent constants (it is not allowed to change after declaration. Once declared, it must be initialized, otherwise an error will be reported) //ES6 constant cannot be modified const b=2; b=3;//Uncaught TypeError: Assignment to constant variable. console.log(b); Variables decl ...

ElasticSearch-helper It has been a while since ElasticSearch was used as the data source for analysis and retrieval. It has experienced several large and small projects. From the first contact with this technology, I was amazed at its ingenious design and its disgusting access api; When I was a beginner, I often looked at the endless chain ...

CentOS 7 RPM installs Elasticsearch 7.14.1 and common plug-ins Installing JDK 1.8 Install jdk: Open the official website to download: https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.htmlDownload the Linux x64 RPM Package: jdk-8u301-linux-x64.rpmInput password, 2696671285@qq.com /Oracle123 (if it fails, you can search th ...

Start with a case pom <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> ...

Official website learning address https://www.elastic.co/guide/en/elasticsearch/client/java-rest/6.6/java-rest-high.html Construction project Create a spring boot maven project Import dependency <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-res ...

Basic usage of springboot springdataelasticsearch introduce Spring Data Elasticsearch is a sub module under the Spring Data project. Check the official website of Spring Data: http://projects.spring.io/spring-data/ The mission of Spring Data is to provide a unified programming interface for various data access, whether it is a relational data ...

ELK learning 1, What is it Elasticsearch is an open source distributed search engine. Its features include: distributed, zero configuration, automatic discovery, automatic index fragmentation, index copy mechanism, restful style interface, multi data sources, automatic search load, etc.Logstash is a completely open source tool. It can collect ...

1. General I talked about the installation of Elasticsearch before. Today, let's talk about the basic use of Elasticsearch. two   Use of Elasticsearch index The index is equivalent to a table in mysql. 2.1 index creation 1) Head plug-in mode Select the index tab, click [new index], enter the index name, number of slices and num ...