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System: CentOS Linux release 7.9.2009 (Core) 1. Installation of GCC Since redis is developed in C language, you must first confirm whether to install gcc environment (gcc -v) before installation. If not, execute the following command to install   course: https://www.cnblogs.com/huangshuqiang/p/15477407.html 2. Download and unzip the instal ...

Data type analysis of Redis source code - DICT The current Redis analysis version is 6.2, which should be noted. DICT, dictionary data structure, is essentially a hash table. Related documents mainly include dict.h and dict.c. Infrastructure dictEntry is a hash node and a key value pair, in which the value adopts the union v. it can be seen ...

Principle of Redis implementing distributed lock We talked about the application of Redis in the actual business scenario. Now let's learn about the application of Redisson functional scenario, that is, the implementation scenario of distributed locks that we often use. Introduce redisson dependency <dependency> <groupId>org. ...

Author Murong Qianyu Source|   https://www.jianshu.com/p/c806003a8530 preface In actual development projects, an exposed interface often faces many requests. Let's explain the concept of idempotence: the impact of any multiple execution is the same as that of one execution. According to this meaning, the final meaning is that the impa ...

1. Overall code example public class JedisSingleTest { public static void main(String[] args) throws IOException { JedisPoolConfig jedisPoolConfig = new JedisPoolConfig(); jedisPoolConfig.setMaxTotal(20); jedisPoolConfig.setMaxIdle(10); jedisPoolConfig.setMinIdle(5); // Timeout, which is both a ...

1, Foreword restframework has its own convenient authentication and permission system: Official document (token authentication) The token of the official document is based on the authToken in the database_ Token table Sometimes, when too much user information needs to be used in subsequent interfaces, frequent, high and distributed qu ...

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 ...

Collection object set types are also used to hold multiple string elements Unlike list types, duplicate elements are not allowed in a collection, and elements in a collection are out of order and cannot be retrieved through an index subscript A collection can store up to 232-1 elements Redis not only supports addition, deletion, and censo ...

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 ...