memcached

memcache开源的，高性能，高并发分布式内存缓存系统,天生支持集群

memcached下载地址：

http://memcached.org/downloads

python实现memcached缓存

pip3 install python-memcached

import memcache
aa=memcache.Client(["10.0.0.20:11211"],debug=True)
aa.set("k1","v1")
print(aa.get("k1"))

memcached方法使用

import memcache
aa=memcache.Client([("10.0.0.20:11211",1),("10.0.0.20:11212",2),("10.0.0.20:11213",1)],debug=True)   #会存到11212中
aa.set("k1","v1")
aa.replace("k1","hahaha")
aa.set('k2', '1')
aa.incr('k2',100)
print(aa.get("k2"))
aa.decr('k2',50)
print(aa.get("k2"))

import memcache
aa=memcache.Client([("10.0.0.20:11211",1),("10.0.0.20:11212",2),("10.0.0.20:11213",1)],debug=True,cache_cas=True)
print(aa.gets("product_count"))
#aa.set("product_count","111")
#在gets和最后的cas之间，如果修改值，就会抛出异常
aa.cas("product_count","899")

redis

redis持久化存储系统，全称remote directory server，是基于key-value的持久化数据库存储系统。redis和memcached很相似，redis的数据类型更丰富：string，list，set，hash，sorted set，redis，支持主从同步，把更新的数据写到磁盘

下载地址： http://download.redis.io/releases/redis-2.8.9.tar.gz

python实现redis缓存

服务器要开启redis，python安装redis模块：pip3 install redis

基本操作：

import redis
aa=redis.Redis(host="10.0.0.20",port=7777)
aa.set("k1","v1",ex=2)
print(aa.get("k1"))

管理连接的连接池：

import redis
pool=redis.ConnectionPool(host="10.0.0.20",port=7777)
aa=redis.Redis(connection_pool=pool)

redis构造方法：

    def __init__(self, host='localhost', port=6379,
                 db=0, password=None, socket_timeout=None,
                 socket_connect_timeout=None,
                 socket_keepalive=None, socket_keepalive_options=None,
                 connection_pool=None, unix_socket_path=None,
                 encoding='utf-8', encoding_errors='strict',
                 charset=None, errors=None,
                 decode_responses=False, retry_on_timeout=False,
                 ssl=False, ssl_keyfile=None, ssl_certfile=None,
                 ssl_cert_reqs=None, ssl_ca_certs=None,
                 max_connections=None):
db:数据库号
password:输入redis设置的密码

redis数据类型：

1，string类型

2，list

3，hash

4，set

5，sorted set

aa.flushdb()
aa.set("k1","v1")
aa.mset({"aa":22,"vv":"22"})
print(aa.get("k1"))
print(aa.mget("k1","aa"))     #[b'v1', b'11']
print(aa.strlen("k1"))
aa.append("こ","じ")
print(aa.keys()[0].decode())    #こ
print(aa.incr("aa"))            #23
print(aa.decr("aa",amount="10"))            #13
exit()

aa.flushdb()
aa.hset("rdi1","k1","v1")
aa.hset("rdi1","k2","v2")           #rdi1={"k1":"v1","k2":"v2"}
aa.hmset("rdi2",{"k1":"v1","k2":"v2"})
aa.hmset("rdi3",{"k1":"v1","k2":"v2"})
print(aa.hmget("rdi2","k2","k1"))
print(aa.hkeys("rdi2"))
print(aa.hvals("rdi2"))
print(aa.keys())
print(aa.hdel("rdi2","k1","k2"))
print(aa.hkeys("rdi2"))

aa.flushdb()
aa.lpush("k1",11,22)            #k1=[22,11]
aa.lpush("k1",33)                #k1.lappend(33)
aa.rpush("k1",11)               #k1.rappend(33)
aa.lrem("k1",11,num=1)

print(aa.type("k1"))
print(aa.llen("k1"))
aa.lset("k1",2,"hello")
aa.rpoplpush("k1","k2")
print(aa.lpop("k2"))
print(aa.lrange("k1",0,aa.llen("k1")))

print(aa.lpop("k1"))
print(aa.lpop("k1"))

aa.flushdb()
aa.sadd("rdi1","v1","v2","v3")          #rdi1={"v1","v2","v3"}
aa.sadd("rdi2","v2","v5")               #rdi2={"v2","v5"}
print(aa.type("rdi1"))
print(aa.scard("rdi1"))
print(aa.sdiff("rdi1","rdi2"))   #rdi1 - rdi2
aa.sdiffstore("rdi3","rdi1","rdi2")      #rdi3 = rdi1 - rdi2
print(aa.sinter("rdi1","rdi2"))     #rdi1 & rdi2
aa.sinterstore("rdi3","rdi1","rdi2")
print(aa.sunion("rdi1","rdi2"))     #rdi1 | rdi2
print(aa.smembers("rdi1"))          #print(rdi1)