linux 安装 redis

Redis Linux 安装

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由于 Redis 并没有发布 windows 的官方版本，windows 的安装使用不作介绍，只介绍 Linux 下的安装使用。 下载地址：https://github.com/dmajkic/redis/downloads 下载最新版本

然后tar, make,即可。(make前，如果确认自己的测试机是32位linux，在src/Makefile文件中的头部加上CFLAGS= -march=i686

redis 2.8.9 安装报错

Jimmy 2013-01-21 11:53
zmalloc.h:50:31: error: jemalloc/jemalloc.h: No such file or directory
zmalloc.h:55:2: error: #error "Newer version of jemalloc required"
make[1]: *** [adlist.o] Error 1
make[1]: Leaving directory `/data0/src/redis-2.6.2/src'
make: *** [all] Error 2

解决办法是：
make MALLOC=libc

zmalloc.h:50:31: fatal error: jemalloc/jemalloc.h: No such file or directory
 #include <jemalloc/jemalloc.h>
                               ^
compilation terminated.
make: *** [adlist.o] Error 1

解决办法还是：
make MALLOC=libc

启动 server： 根目录下执行 nohup src/redis-server redis.conf &

如果端口有冲突改下 redis.conf 里面的 port 配置

启动客户端 src/redis-cli 端口有变化 src/redis-cli -p 6479

测试下

redis 127.0.0.1:6479> set test test
OK
redis 127.0.0.1:6479> get test
"test"

　　与你熟悉的关系型数据库一致，Redis有着相同的数据库基本概念，即一个数据库包含一组数据。

　　典型的数据库应用案例是，将一个程序的所有数据组织起来，使之与另一个程序的数据保持独立。 在Redis里，数据库简单的使用一个数字编号来进行辨认，默认数据库的数字编号是0。如果你想切换到一个不同的数据库，你可以使用select命令来实现。在命令行界面里键入select 1，Redis应该会回复一条OK的信息，然后命令行界面里的提示符会变成类似redis 127.0.0.1:6379[1]>这样。如果你想切换回默认数据库，只要在命令行界面键入select 0即可。

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为了方便,我们把 

redis-server,和 redis-cli 提取出来

[root@localhost local]# mkdir -p redis/bin
[root@localhost local]# mkdir -p redis/etc
[root@localhost local]# cp /usr/share/redis-2.8.9/src/redis-server /usr/share/redis-2.8.9/src/redis-cli /usr/local/redis/bin/
[root@localhost local]# cp /usr/share/redis-2.8.9/redis.conf /usr/local/redis/etc/

启动  redis-server 

[root@localhost src]# ./redis-server 
[7419] 11 May 18:09:10.311 # Warning: no config file specified, using the default config. In order to specify a config file use ./redis-server /path/to/redis.conf
[7419] 11 May 18:09:10.312 * Increased maximum number of open files to 10032 (it was originally set to 1024).
                _._                                                  
           _.-``__ ''-._                                             
      _.-``    `.  `_.  ''-._           Redis 2.8.9 (00000000/0) 64 bit
  .-`` .-```.  ```/    _.,_ ''-._                                   
 (    '      ,       .-`  | `,    )     Running in stand alone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 7419
  `-._    `-._  `-./  _.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |           http://redis.io        
  `-._    `-._`-.__.-'_.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |                                  
  `-._    `-._`-.__.-'_.-'    _.-'                                   
      `-._    `-.__.-'    _.-'                                       
          `-._        _.-'                                           
              `-.__.-'                                               

[7419] 11 May 18:09:10.313 # Server started, Redis version 2.8.9
[7419] 11 May 18:09:10.313 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
[7419] 11 May 18:09:10.314 * The server is now ready to accept connections on port 6379

很明显,这不符合我们的需求,我们需要让他后台打开,

vi /usr/local/redis/etc/redis.conf 

将行 daemonize no 改为 daemonize yes

再次执行  redis-server /usr/local/redis/etc/redis.conf 

# redis-server /usr/local/redis/etc/redis.conf 

我们再登陆测试一下

# redis-cli 

redis 127.0.0.1:6479> set test test
OK
redis 127.0.0.1:6479> get test
"test"

到此Redis 安装成功.

Redis 客户端测试

1. Java 官方推荐客户端 Jedis

import java.util.Date;
import redis.clients.jedis.Jedis;

public class RedisTest {

    public static void main(String[] args) {
        long start = System.currentTimeMillis();
        String host = "127.0.0.1";
        int port = 6479, timeout = 30000;
        Jedis jedis = new Jedis(host, port, timeout);
        for (int i = 1; i <= 500000; i++) {
            String key = "comppara_" + i;
            String value = "{param1: " + i + ", param2: " + i + ", param3: " + i + "}";
            jedis.set(key, value);
        }
        long end = System.currentTimeMillis();
        System.out.println(Thread.currentThread().getName() + " insert times " + (end - start));

        long s = System.currentTimeMillis();
        for (int i = 0; i <= 500000; i++) {
            String key = "comppara_" + i;
            jedis.get(key);
        }
        long e = System.currentTimeMillis();
        System.out.println(Thread.currentThread().getName() + " read times " + (e - s));
    }
}

1. C 官方推荐客户端 hiredis

　　　　C 也不怎么会用，就改的 hiredis 自带的 example.c 示例，编译完了直接执行 ./hiredis-example

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "time.h"
#include "hiredis.h"

void get_time() {
        time_t rawtime;
        struct tm * timeinfo;
        time ( &rawtime );
        timeinfo = localtime ( &rawtime );
        printf ( "07The current date/time is: %s", asctime (timeinfo) );
}
int main(void) {
    unsigned int j;
    redisContext *c;
    redisReply *reply;

    struct timeval timeout = { 1, 500000 }; // 1.5 seconds
    c = redisConnectWithTimeout((char*)"127.0.0.1", 6479, timeout);
    if (c == NULL || c->err) {
        if (c) {
            printf("Connection error: %s
", c->errstr);
            redisFree(c);
        } else {
            printf("Connection error: can't allocate redis context
");
        }
        exit(1);
    }

        get_time();
        printf("test_bach start");
        for (int i = 1; i <= 500000; i++) {
redisCommand(c,"SET param_%d {param1:param%d,param2:param%d,param3:param%d,param4:param%d}", i, i, i, i, i);
        }
        printf("test_bach end");
        get_time();

        for (int j = 1; j <= 500000; j++) {
redisCommand(c,"GET param_%d", j);
        }
        get_time();

    return 0;
}

测试主机配置：8CPU32G内存，测试结果 C 插入 50W 记录大概在31秒左右，JAVA 34秒左右；读 50W 的速度 C 大概需要 29 s 左右，JAVA 需要 31s 左右。如果是远程机器调用JAVA速度基本跟C相差无几。