Programmer Group

1, OpeningRedis, as a general cache model, is very popular because of its high performance. Redis version 2.x only supports stand-alone mode, and the cluster mode has been introduced since version 3.0.Redis's Java ecological clients include Jedis, Redisson and lattice. Different clients have different capabilities and use methods. This paper ma ...

From 1, Distributed lock overview In the multithreaded environment, in order to ensure that a code block can only be accessed by one thread at a time, we can generally use the synchronized syntax and ReetrantLock in Java to ensure that this is actually the way of local locking. But now companies are a ...

This article learns to use a Java client (Jedis / Lettuce) to operate Redis. 1 Open remote connection Redis does not support remote connections by default and needs to be turned on and modified manuallyRedis.confThere are three major changes: vi /usr/local/redis-5.0.8/redis.conf # bind 127.0.0.1 protected-mode no requirepass 123456 Then resta ...

Article catalog 1. Concept: redis is a high-performance NOSQL series non relational database 1.1. What is NOSQL 1.1.1. Comparison between NoSQL and relational database 1.1.2. Advantages of non relational database: 1.1.3. Advantages of relational database: 1.1.4. Summary 1.2. Mainstream NOSQL produ ...

Redis Redis 1. CAP principle of relational database CAP Three in two of CAP BASE 2. Introduction to distributed and cluster Distributed colony 3. Introduction to redis What is it? characteristic application basic operation add to Value 4. Redis data type String List Set Hash Zset 5. Three ...

Redis 1. Concept: redis is a high-performance NOSQL series Philippine relational database. 2. Comparison between NoSQL and relational database Relational database: mysql, Oracle 1. Data is related 2. Data is stored on the hard disk file Non relational database (NoSQL): redis, hbase 1. No associ ...

In modern programming languages, programmers who have been exposed to multithreaded programming have a certain understanding of locks. In short, the lock in multithreading is a mechanism to ensure the consistency of shared resources when multiple threads modify shared resources in multithreading environment. We will not expand here. In the dis ...

I've seen all kinds of codes that use redis to implement distributed locks on the network. They are either wrong or fragmented. There is no complete example. Let me summarize two mechanisms of redis to implement distributed locks this weekend Spin lock and exclusive lock In view of the different ways of implementing locks, the policy pattern ...

1. Create project 1.1 creation steps 1.2 add pom dependency <dependencies> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.9.0</version> </dependency> <!--test--> <dep ...

Edition CentOS 8.1.1911(VMWare) redis 5.0.8 Essential information Server IP: 192.168.31.68 Redis port: 7000 (primary) 7001,7002 (slave) Sentinel port: 27000 27001 27002 The key code or command represents this Configure Redis master7000.conf bind 0.0.0.0 port 7000 daemonize yes dir /home/misty/redis-data/sentinel01 pidfile /var/run/redis_ ...