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1. Redis transaction 1.1 role of redis transaction Redis transaction is a separate isolation operation. All commands in the transaction will be serialized and executed sequentially (because of single thread + IO multiplexing). During the execution of the transaction, it will not be interrupted by the command request sent by other client ...

Lua scripts quick start Lua is case sensitive premise After Lua is installed on this machine, the installation steps of lua can be completed Basics notes -- This is a single line comment -- [[ This is a multiline comment This is a multiline comment -- ]] Reserved keywords Reserved keyword document address variable Type when ...

This project is a Spring boot project Redis Cutting Programming Target: Add a comment to the method to cache when querying Method: Custom Note+AOP Section Programming step Say nothing but go directly to the code demonstration Step One Definition Notes @Retention(RetentionPolicy.RUNTIME) @Target( ...

What is a distributed lock? In a JVM, where multiple threads are concurrent, we can use synchronous or Lock locks to ensure that only one thread can modify shared variables or execute code blocks at a time.However, our services are deployed on a distributed cluster basis, and for some shared resources, the use of Java locks in a distributed en ...

Write in front    see GitHub for all sample codes in this tutorial: https://github.com/selfconzrr/Redis_Learning Why close the connection? For example, the following code: for(int i = 2000; i < 3000; i++) { Jedis jedis = redisDao.getJedis(); jedis.set("user:" + i, jedis.toString()); System.o ...

 1. application.properties #thymeleaf spring.thymeleaf.prefix=classpath:/templates/ spring.thymeleaf.suffix=.html spring.thymeleaf.cache=false spring.thymeleaf.content-type=text/html spring.thymeleaf.enabled=true spring.thymeleaf.encoding=UTF-8 spring.thymeleaf.mode=HTML5 # mybatis mybatis.type-ali ...

scene After a machine crashes in the redis cluster, the redis of the background service will always report an error and cannot connect to the redis cluster. View the redis cluster through the command. It is found that the redis cluster cluster is normal. The standby slave machine has been upgraded to master. Conjecture and verification It is pr ...

Distributed locks are often required in microservices to perform some tasks.For example, deleting expired data periodically requires only one to execute in multiple services. The following describes distributed locks in a less rigorous sense, because redis implements distributed locks in a rigorous sense or is more complex, using the following ...

This time, I want to share with you that redis is used in spring boot integration. Here, the jedis client of redis is used (here, redis running by docker, please refer to docker quickly builds several common third-party services ), add dependencies as follows: <dependency> <groupId>redis.clients</groupId> <artifact ...

There are three ways to implement the distributed lock: 1. Optimistic database lock; 2. Redis based distributed lock; 3. ZooKeeper based distributed lock. This blog will introduce the second way to implement distributed locks based on redis. Although there are various blogs about the implementation of redis distributed lock on the Internet, the ...