Redis master-slave mode

In order to improve the performance of redis, you can create a redis based on the master-slave mode, which is responsible for write operations on the master server and read operations on the slave server.

 

Configuration of Redis master-slave mode:

1. Copy the redis.conf file to the /usr/local/bin directory, name it redis-slave.conf, modify the port number to 6479, and act as a slave server based on this file

cp redis.conf redis-slave.conf

2. Modify the redis-slave.conf configuration file

 

Here we use the redis server with port 6479 as the slave server with port 6379 server

Modify the redis-slave.conf configuration file

 

After modification, start the master-slave server:

[root@localhost bin]# redis-server redis.conf
[root@localhost bin]# redis-server redis-slave.conf

Connect to the reids master-slave server and view the master-slave information

 

test:

The value of a is set to 10 on the host, and a is obtained from the slave

 

 

 Master-slave mode code:

package com.study.util;

import redis.clients.jedis.Jedis;

public  class RedisMasterSlave {

    public static void main(String[] args) throws InterruptedException {
        Jedis master = new Jedis("192.168.150.129",6379);//主机  
        master.auth("1234");
        Jedis slave = new Jedis("192.168.150.129",6579); // Slave   
        slave.auth("1234" );
         // Set the host of the 6579 server to 6379 
        slave.slaveof("192.168.150.129",6379 );  
      
        master.select(1);
        master.setex( "a",100,"100"); // The host writes  
          
        // Delay for one second to prevent reading and writing in memory from being too fast, reading is completed before writing and null occurs   
        Thread.sleep(1000 );  
        
        slave.select(1);
        String result = slave.get("a"); // The slave   reads 
        System.out.println(result);  
        
        master.close();
        slave.close();
    }
}

View Code

Before code execution:

After execution:

Note: The redis server with port 6579 is a newly configured server. The configuration file does not configure its main server before the code is executed. At this time, it runs as a separate server.

After executing the code slave.slaveof("192.168.150.129",6379);, it is set as the slave server of 6379. At this time, the server with port 6379 has two slave servers of 6479 and 6579.

 

Code git address: https://gitee.com/sjcq/redis.git