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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 ...

Article Directory Preface thinking HyperLogLog Use Redis command action Working with Java code The Principle and Feature of HyperLog Implementation Implement HyperLog using Java Summary Preface Web site UV refers to the amount of Unique Visitor visited by independent users of a Web site, that ...

Article Directory Distributed Lock 1. Distributed Lock Implementation 2. Distributed Lock Using redis Learning optimization summary Problems in the redis cluster state: Solving distributed locks using redisson 1. Import dependent service-util 2. Configure redisson Reentrant Lock Test Code Dis ...

introduction In general, in order to solve a single point of failure, web applications in the production environment will be deployed on multiple platforms, so there will be a problem. When we log in, we will store the login information in the session. If we rely on the session in the native web con ...

RedisLock -- make Redis distributed lock simple catalog 1. Project introduction 2. Fast use 2.1 introducing maven coordinates 2.2 register RedisLock 2.3 use 3. Participation and contribution 4. Contact the author 5. Open source protocol 1. Project introduction This project mainly simplifies the operation of redis distributed transact ...

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 ...

Container and image container Common container States running stopped paused created deleted Note: to view the commands used for docker status: docker ps: container for viewing running status docker ps -a: View containers in all States docker ps -qa: view all container ID S docker stop $(docker ps -qa): stop all containers docker rm $(docke ...

Original text: Microsoft.AspNetCore.Authentication.Cookies from entry to mastery (2) Microsoft.AspNetCore.Authentication.Cookies from entry to mastery (2) catalog Microsoft.AspNetCore.Authentication.Cookies from entry to mastery (2) Cookie encryption Cookie pseudo encryption (serialization / deserialization) ...

Original text: ASP.NET Core file upload preface First blog post Introduced how to asp.net Core uses Redis and Protobuf for Session caching. This article is a small function used in the development process, how to do single file and multi file upload. If you think it will help you, you may as well click "recommend". cat ...

In the early stage, due to the small business volume of the production environment. So logs are commit ted one by one. There was no problem with the operation. Later, with the expansion of business concurrency, the log writing frequently deals with the database, resulting in the database connection pool often occupied, until the program crashes ...