memcached & redis

参考http://www.cnblogs.com/wupeiqi/articles/5132791.html

    以下例子在电脑上运行过,但是没有效果,暂时没有找到原因

管道:

    redis-py默认在执行每次请求都会创建(连接池申请连接)和断开(归还连接池)一次连接操作,如果想要在一次请求中指定多个命令,则可以使用pipline实现一次请求指定多个命令,并且默认情况下一次pipline 是原子性操作。

示例1

import redis
 
pool = redis.ConnectionPool(host='10.211.55.4', port=6379)
 
r = redis.Redis(connection_pool=pool)
 
# pipe = r.pipeline(transaction=False)
pipe = r.pipeline(transaction=True)
pipe.multi()
pipe.set('name', 'alex')
pipe.set('role', 'sb')
 
pipe.execute()

示例2

import redis

conn = redis.Redis(host='192.168.1.41',port=6379)

conn.set('count',1000)

with conn.pipeline() as pipe:

    # 先监视,自己的值没有被修改过
    conn.watch('count')

    # 事务开始
    pipe.multi()
    old_count = conn.get('count')
    count = int(old_count)
    if count > 0:  # 有库存
        pipe.set('count', count - 1)

    # 执行,把所有命令一次性推送过去
    pipe.execute()

Dashboad和数据处理


monitor_redis.py
import redis


class RedisHelper:

    def __init__(self):
        self.__conn = redis.Redis(host='10.211.55.4')
        self.chan_sub = 'fm104.5'
        self.chan_pub = 'fm104.5'

    def public(self, msg):
        self.__conn.publish(self.chan_pub, msg)
        return True

    def subscribe(self):
        pub = self.__conn.pubsub()
        pub.subscribe(self.chan_sub)
        pub.parse_response()
        return pub

consumer.py

from monitor_redis import RedisHelper
 
obj = RedisHelper()
redis_sub = obj.subscribe()
 
while True:
    msg= redis_sub.parse_response()
    print (msg)

producer.py

from monitor_redis import RedisHelper
 
obj = RedisHelper()
obj.public('hello')

sentinel

redis重的sentinel主要用于在redis主从复制中,如果master顾上,则自动将slave替换成master

from redis.sentinel import Sentinel
 
# 连接哨兵服务器(主机名也可以用域名)
sentinel = Sentinel([('10.211.55.20', 26379),
                     ('10.211.55.20', 26380),
                     ],
                    socket_timeout=0.5)
 
# # 获取主服务器地址
# master = sentinel.discover_master('mymaster')
# print(master)
#
# # # 获取从服务器地址
# slave = sentinel.discover_slaves('mymaster')
# print(slave)
#
#
# # # 获取主服务器进行写入
# master = sentinel.master_for('mymaster')
# master.set('foo', 'bar')
 
 
 
# # # # 获取从服务器进行读取(默认是round-roubin)
# slave = sentinel.slave_for('mymaster', password='redis_auth_pass')
# r_ret = slave.get('foo')
# print(r_ret)

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转载自blog.csdn.net/zhuisaozhang1292/article/details/80921210