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Tags (space separated): building big data platform 1: Environment initialization 2: Installation of CDH5.16.2 1.1: introduction to system environment System: RHEL7.7X64 cat /etc/hosts --- 192.168.100.21 rhel01.flyfish 192.168.100.22 rhel02.flyfish 192.168.100.23 rhel03.flyfish 192.168.100.24 rhel04.flyfish ----- Only three ...

order This paper focuses on my SQL connection of canal ErosaConnection canal-1.1.4/parse/src/main/java/com/alibaba/otter/canal/parse/inbound/ErosaConnection.java public interface ErosaConnection { public void connect() throws IOException; public void reconnect() throws IOException; public void disconnect() throws IOException; ...

If the server is powered off and restarted or restarted within the plan, the database instance and monitoring need to be started manually after the server's operating system is started. This paper introduces how to configure the start and shutdown of Oracle database as a system service, and automatically start / shut down the Oracle instance a ...

The scene of students choosing courses is similar to that of buying train tickets. Baidu summed up four ways 1. Thread lock. With synchronized, the performance drops sharply. java itself is multithreaded. It's not a wise choice to use it as a single thread. At the same time, if you add synchronized to distributed deployment, you cannot control ...

Get a framework, in addition to understanding the framework, but also to achieve the basic CURD operation. Add to 1. Configure route, specify add page; // Add the following in routes/web.php: // Add page and storage path Laravel7/resources/views/Users/add.blade.php // The view file ends with. blade.php by default Route::get('/add', function(){ ...

1. Functions 1.1 case conversion function function describe LOWER() All lowercase UPPER() uppercase INITCAP() title case 1.2 String Operating Functions function describe concat() Split String Substr (field, startIndex,endIndex) substr length() String Length Instr (field,'character') Location index where specified characte ...

1 Introduction Redis is a high-performance NoSQL database and is often used as a cache in major Internet architectures.This article describes how to integrate Spring Data Redis in Springboot and work with Repository. The code structure is as follows: 2 Integration process 2.1 Install Redis Database To save time, install it directly from Docker ...

thanks Download sonarqube-6.4 Download SonarQube Scanner mysql adds a database named sonar and the user sonarqube@sonarqube Unzip SonarQube and modify the database configuration and user configuration of the configuration file [root@localhost pig]# vim sonarqube-6.4/conf/sonar.properties # Configure database user na ...

We will often mention BI system (Business Intelligence), which is an important data entry and exit to help data and enterprises to obtain data reports and make strategic decisions. We are familiar with FineBI and Microsoft's powerBI, but the cost of using them is not low, the client is needed for authorization, and the configuration of using t ...

Table of contents Preface Custom parameters Log output mode file network transmission data base Scientific use Reference documents   Preface A year ago, I wrote an introduction to NLog NLog log framework use inquiry-1 , this article briefly introduces the basic use of NLog and ho ...