redis学习笔记

参考:http://hi.baidu.com/lhuylaqqqjdqwxe/item/49839c0aa3a4ade1f45ba6ef

一 安装

$ wget http://redis.googlecode.com/files/redis-2.2.12.tar.gz
$cd /root/redis-2.2.12/src 
$make PREFIX=/usr/local/redis
$make test
$root@yee:~/redis-2.6.2/src# make test
You need 'tclsh8.5' in order to run the Redis test
make: *** [test] Error 1

 

需要安装tcl :

$apt-get install tcl8.5
$make PREFIX=/usr/local/redis install 

二 redis配置:

$cd /usr/local/redis/
$mkdir {etc,var}
$cp ~/redis-2.6.2/redis.conf  ./etc/

下面启动redis服务.

$./redis-server

注意这种方式启动redis 使用的是默认配置。也可以通过启动参数告诉redis使用指定配置文件使用下面命令启动.

$ ./redis-server redis.conf

redis.conf是一个默认的配置文件。我们可以根据需要使用自己的配置文件。
启动redis服务进程后，就可以使用测试客户端程序redis-cli和redis服务交互了.
比如

ubuntu@yee:~$ cd /usr/local/redis/
ubuntu@yee:/usr/local/redis$ ls
bin  etc  var
ubuntu@yee:/usr/local/redis$ bin/redis-cli 
redis 127.0.0.1:6379> set foo bar 
OK
redis 127.0.0.1:6379> get foo 
"bar"

三、redis 的一些基本指令学习

3.1 redis pipeline

pipeline 将多个redis命令打包在一块，发送给服务器，服务器再逐条执行命令，打包执行结果一并返回。

假如在普通的模式下，client 发送一条命令给服务器，服务器返回一条结果给client，如果网络延迟是0.2s，那么大概1s也就只能处理5条命令，这并不能充分利用到redis的能力 。

>>> pipeline = r.pipeline()
>>> pipeline.rpush('chat','one')
<redis.client.Pipeline object at 0x7fa79d497c90>
>>> pipeline.rpush('chat','two')
<redis.client.Pipeline object at 0x7fa79d497c90>
>>> pipeline.execute()
[1L, 2L]
>>> r.lrange('chat',0,-1)
['one', 'two']
>>> 

四 python 操作redis 学习:

easy_install redis
>>> import redis 
>>> r = redis.Redis(host='localhost',port=6379,db=0)
>>> r.set('foo','bar')
True
>>> r.get('foo')
'bar'
>>> r.delete('foo')
True
>>> r.dbsize()
0L


>>> r.rpush('ml','aa')
1L
>>> r.rpush('ml','bb')
2L
>>> r.rpush('ml','cc')
3L
>>> r.rpush('ml','dd')
4L
>>> r.lrange('ml',0,-1)
['aa', 'ad', 'cc', 'dd']

INCR :自增变量 
>>> room_id  = rc.incr("KEY")
>>> room_id 
1
>>> room_id  = rc.incr("KEY")
>>> room_id 
2

redis keys 还接受正则表达式:
如:
redis 127.0.0.1:6379> mset one 1 two 2 three 3 
OK
redis 127.0.0.1:6379> keys *o*
1) "one"
2) "two"

redis zadd :adds all specified members with the  specified scores to the sorted set at key .
                  Time complexity : O(log(N))
redis 127.0.0.1:6379> zadd myset 1 "one"
(integer) 1
redis 127.0.0.1:6379> zadd myset 1 "uno"
(integer) 1
redis 127.0.0.1:6379> zadd myset 2 "two"
redis 127.0.0.1:6379> zrange myset 0 -1 
1) "one"
2) "uno"
3) "two"
redis 127.0.0.1:6379> zrange myset 0 -1 withscores
1) "one"
2) "1"
3) "uno"
4) "1"
5) "two"
6) "2"
redis 127.0.0.1:6379> zadd myset 1 "three"
(integer) 1
redis 127.0.0.1:6379> zrange myset  0 -1 
1) "one"
2) "three"
3) "uno"
4) "two"
redis 127.0.0.1:6379> zrange myset 0 -1 withscores
1) "one"
2) "1"
3) "three"
4) "1"
5) "uno"
6) "1"
7) "two"
8) "2"

 添加 删除使用方法 ：

>>> rc.zadd("online23","user1",2)
1
>>> rc.zadd("online23","user2",3)
1
>>> rc.zadd("online23","user3",3)
1

>>> rc.zrange("online23",0,-1)
['user1', 'user2','user3']

>>> rc.zrem("online23","user3")
True
>>> rc.zrange("online23",0,-1)
['user1', 'user2']