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Preface Author: Light as the breeze cyfDate: 2021/1/4-2021/1/11This article comes from the Comprehensive Course Design of Software Direction in Senior Three School 1. Topics and Contents of Course Design 1. Basic Facts (1) Students belong to only one class (e.g. Accounting 181) (2) There are six classes in Grade 18 of the Accounting Dep ...

Business description All article tags are queried from a blog database and stored in the cache. Subsequent queries can be obtained from the cache. Improve its query performance. preparation Initialization data Initialize the data in the database. The SQL script is as follows: DROP DATABASE IF EXISTS `blog`; CREATE DATABASE `blog` DEFAULT ...

1, clickhouse - Introduction ClickHouse is a column database management system (DBMS:Database Management System) for online analytical processing (OLAP) opened by Yandex of Russia in 2016. It is mainly used for online analytical processing query (OLAP), and can use SQL query to generate analysis data report in real time. The full name of C ...

This paper is a dynamic node MyBatis tutorial My study notes. Chapter I 1. Three tier architecture (1) Functions of three layers User Interface Layer: accepts user data and displays the processing results of requests, including jsp, html, servlet, etc. Corresponding controller package; Business Logic Layer: accept the data passed from the ...

redis high availability cluster deployment scheme 1. redis installation and deployment redis installation is recommended to use source code compilation and installation, which is applicable to most linux systems # To download the redis file, it is recommended to create a new folder where you want to install it, and then download it to the fo ...

Redis master-slave replication brief introduction The read-write capability supported by a single redis is still limited. At this time, we can use multiple redis to improve the concurrent processing capability of redis. How these redis cooperate requires a certain architecture design. Here, we first analyze and implement the master / slav ...

Redis transaction introduction summary Redis adopts the optimistic locking method for transaction control. It uses the watch command to see the given key. When exec(t commits the transaction), if the monitored key is valid for the whole connection, such as disconnecting the connection, the supervisor and transaction will be automatically clea ...

background In some application scenarios, you need to quickly load a large amount of data into the PostgreSQL database, such as database migration, SQL log analysis, etc. How many ways to quickly insert data on PG? What is the efficiency of each scheme? How can I tune for faster data loading? Scene setting SQL log analysis is a tool for coll ...

1. Homepage data banner display (Backend) 1.1 create sub module service in service_cms 1.2 create profile In application.properties # Service port server.port=8004 # service name spring.application.name=service-cms # mysql database connection spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql:/ ...

Enable binary log function Set the storage directory and file name prefix of binary log files in the configuration file / etc/my.cnf: log-bin=/var/lib/mysql/mybinlog/mysql-bin server-id=1 Enable exclusive tablespaces: innodb_file_per_table=1 explain: 1. According to the above configuration, after the database service is restarted, ...