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HomeDatabaseMysql Tutorial十分简单的redis使用说明及性能测试

十分简单的redis使用说明及性能测试

Jun 07, 2016 pm 03:28 PM
redisInstructions for useoutperformancetestSimple

转载请注明出处:http://blog.csdn.net/jmppok/article/details/18085181 redis相比很多人都知道,是一个内存式的key-value数据库,存取速度极快,使用非常简单,支持多种语言。本文对其使用进行一个简要说明,并进行简单测试。 1.下载与编译 可以从redis官

转载请注明出处:http://blog.csdn.net/jmppok/article/details/18085181

redis相比很多人都知道,是一个内存式的key-value数据库,存取速度极快,使用非常简单,支持多种语言。本文对其使用进行一个简要说明,并进行简单测试。

1.下载与编译

可以从redis官网下载最新的源码包:http://www.redis.io/

编译十分简单make既可。

2.redis安装与配置

实际上并不需要安装。redis编译后会在src目录下生成redis-server,它是一个可执行文件,即启动redis服务。不过它需要一个配置文件。配置文件写法网上很多了,这里直接给出一个示例:

 

daemonize yes
pidfile /tmp/redis/var/redis.pid
port 6379
timeout 300
loglevel debug
logfile /tmp/redis/var/redis.log
databases 16
save 900 1
save 300 10
save 60 10000
rdbcompression yes
dbfilename dump.rdb
dir /tmp/redis/var/
appendonly no
appendfsync always
#glueoutputbuf yes
#shareobjects no
#shareobjectspoolsize 1024
将其保存为redis.conf
然后直接运行./redis-server redis.conf就可以启动redis服务了,是不是很方便呢?

 

3.C/C++访问redis

在redis源码目录下有一个deps目录,下面有一个hiredis目录。redis编译时会自动编译该目录生成libhiredis.a,通过引用hiredis.h 和 libhiredis.a就可以访问redis了。具体步骤如下:

1)创建一个redisContext

2)通过redisContext执行命令

3)从返回redisReply中获取所需数据

代码如下:

redisContext * c = redisConnect((char *)"192.168.150.135",6379); const char * pData = "this is a test"; 
redisReply *reply1 = (redisReply *)redisCommand(c,"SET 100 %s",pData); 
freeReplyObject(reply1);
redisReply *reply2 = (redisReply *)redisCommand(c,"GET 100");
printf("%s\n",reply2->str);
freeReplyObject(reply2);
是不是非常简单呢? 

不过需要注意的是,redis接受的数据是字符串,对于二进制数据,可以通过base64编码来解决。具体可参看我的另一篇文章。

4.Java访问redis

redis可以支持多种语言,当然也可以支持Java。

首先需要下载redis的java包。jedis.jar。这里提供一个下载地址:redis的Java客户端jedis

使用如下:

Jedis jedis = new Jedis("192.168.150.135");
jedis.set("100","this is a test");
String data = jedis.get("100");

5.性能测试

测试方法:向redis写一个1M的数据,分别写10次,读10次,计算其耗时。分C++和Java两个版本进行测试。

C++测试代码

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

int main(int argc, char **argv)
{
	printf("CLOCKS_PER_SEC:%d\n",CLOCKS_PER_SEC);
	redisContext *c;
    redisReply *reply;

    c = redisConnect((char *)"one-60",6379);

	char * pData;
    
    reply = (redisReply *)redisCommand(c,"GET 0");
	int size = strlen(reply->str);
	pData = new char[size+1];
	strcpy(pData,reply->str);
    freeReplyObject(reply);
	
	clock_t start, finish;
	start = clock();
	
	for(int i=0;i<10; i++)
	{
		reply = (redisReply *)redisCommand(c,"GET %d",i);
		freeReplyObject(reply);
	}
	
	finish = clock();
	double duration = (double)(finish - start) / CLOCKS_PER_SEC*1000;
	printf("GET Time used:%f ms.\n",duration);
	
	
	start = clock();
	
	for(int i=0;i<10; i++)
	{
		reply = (redisReply *)redisCommand(c,"SET %d %s",i,pData);
		freeReplyObject(reply);
	}
	
	finish = clock();
	duration = (double)(finish - start) / CLOCKS_PER_SEC*1000;
	printf("SET Time used:%f ms.\n",duration);
				
	delete []pData;
	redisFree(c);
}
测试结果
CLOCKS_PER_SEC:1000000
GET Time used:190.000000 ms.
SET Time used:70.000000 ms. 

Java测试代码

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Date;

import redis.clients.jedis.Jedis;


public class JedisTest {
	public static void main(String[] args)
	{
		Jedis jedis = new Jedis("10.100.211.232");
		
		String f = "/tmp/e2.txt.backup";
		
		try
		{
			File file = new File(f);
			BufferedReader reader = new BufferedReader(new FileReader(file));
			String data = reader.readLine();
			reader.close();
			
			Date start = new Date();
			for(int i=0; i<10; i++)
			{
				jedis.set(i+"", data);
			}
			Date end = new Date();
			System.out.println("Set used(ms):"+(end.getTime()-start.getTime()));
			
			start = new Date();
			for(int i=0; i<10; i++)
			{
				String v = jedis.get(i+"");
			}
			end = new Date();
			System.out.println("Get used(ms):"+(end.getTime()-start.getTime()));
			
		}catch (Exception e)
		{
			e.printStackTrace();
		}
		jedis.disconnect();
	}
}

测试结果
Set used(ms):1212
Get used(ms):1437

6.总结

redis效率还是非常高的,读写1M数据的数据,耗时都在10ms左右。

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