redis 2

set　　不重复

sadd

SADD key member [member ...]
  summary: Add one or more members to a set
  since: 1.0.0
  group: set

127.0.0.1:6379> sadd s_set 1 3 2 4 2
(integer) 4
127.0.0.1:6379> SMEMBERS s_set
1) "1"
2) "2"
3) "3"
4) "4"

scard  s_set　　#获取元素个数

sdiff

SDIFF key [key ...]
  summary: Subtract multiple sets
  since: 1.0.0
  group: set

127.0.0.1:6379> sdiff s_set s_set2　　# s_set有，s_set2没有
1) "1"
2) "2"

SDIFFSTORE 

SDIFFSTORE destination key [key ...]
  summary: Subtract multiple sets and store the resulting set in a key
  since: 1.0.0
  group: set

127.0.0.1:6379> SDIFFSTORE s_set3 s_set s_set2
(integer) 2
127.0.0.1:6379> SMEMBERS s_set3
1) "1"
2) "2"

sinter 交集 ，参数是多个key

sinter s_set s_set2

SINTERSTORE 

SINTERSTORE destination key [key ...]
  summary: Intersect multiple sets and store the resulting set in a key
  since: 1.0.0
  group: set

SISMEMBER 

SISMEMBER key member
  summary: Determine if a given value is a member of a set　　#是返回1
  since: 1.0.0
  group: set

smove

SMOVE source destination member
  summary: Move a member from one set to another
  since: 1.0.0
  group: set

spop

SPOP key [count]
  summary: Remove and return one or multiple random members from a set
  since: 1.0.0
  group: set

SRANDMEMBER 

SRANDMEMBER key [count]
  summary: Get one or multiple random members from a set
  since: 1.0.0
  group: set

srem

SREM key member [member ...]
  summary: Remove one or more members from a set
  since: 1.0.0
  group: set

sunion 并集

SUNION key [key ...]
  summary: Add multiple sets
  since: 1.0.0
  group: set

SUNIONSTORE 

SUNIONSTORE destination key [key ...]
  summary: Add multiple sets and store the resulting set in a key
  since: 1.0.0
  group: set

sscan

sortedset 有序集合

zadd

ZADD key [NX|XX] [CH] [INCR] score member [score member ...]
  summary: Add one or more members to a sorted set, or update its score if it already exists
  since: 1.2.0
  group: sorted_set

zrange

ZRANGE key start stop [WITHSCORES]
  summary: Return a range of members in a sorted set, by index
  since: 1.2.0
  group: sorted_set

zrank

ZRANK key member
  summary: Determine the index of a member in a sorted set
  since: 2.0.0
  group: sorted_set

其它操作：

del

DEL key [key ...]
  summary: Delete a key
  since: 1.0.0
  group: generic

keys

KEYS pattern
  summary: Find all keys matching the given pattern
  since: 1.0.0
  group: generic

expire

EXPIRE key seconds
  summary: Set a key's time to live in seconds
  since: 1.0.0
  group: generic

rename

RENAME key newkey
  summary: Rename a key
  since: 1.0.0
  group: generic

move

MOVE key db
  summary: Move a key to another database
  since: 1.0.0
  group: generic

RANDOMKEY 

RANDOMKEY -
  summary: Return a random key from the keyspace
  since: 1.0.0
  group: generic

connection

select　　#共 16 个

SELECT index
  summary: Change the selected database for the current connection
  since: 1.0.0
  group: connection

python

import redis

#连接池
# pool = redis.ConnectionPool(host='localhost',port=6379,db=0)
# r = redis.Redis(connection_pool=pool)

#pipe
pool = redis.ConnectionPool(host='localhost',port=6379,db=0)
r = redis.Redis(connection_pool=pool)

pipe = r.pipeline(transaction=True)

pipe.set('name','lyb')
pipe.set('age','12')

pipe.execute()

发布订阅：

#redis_p_s.py

import redis

class RedisPS(object):
    def __init__(self):
        pool = redis.ConnectionPool(host='localhost', port=6379, db=0)
        self._conn = redis.Redis(connection_pool=pool)
        self.chan_pub = 'ps'
        self.chan_sub = 'ps'
    def r_pub(self,msg):
        self._conn.publish(self.chan_pub,msg)
        return True
    def r_sub(self):
        pub = self._conn.pubsub()
        pub.subscribe(self.chan_sub)
        pub.parse_response()
        return pub

#publisher.py

from redis_p_s import RedisPS

obj = RedisPS()
while True:
    msg = input('msg: ')
    obj.r_pub(msg)
    if msg == 'q':
        break

#subscriber.py

from redis_p_s import RedisPS

obj = RedisPS()
s = obj.r_sub()
print('recv: ')

while True:
    msg = s.parse_response()  #阻塞监听
    print('>> ',msg[2].decode())

持久化配置：

sudo gedit /etc/redis/redis.conf

################################ SNAPSHOTTING（快照）  ################################
#
# Save the DB on disk:
#
#   save <seconds> <changes>
#
#   Will save the DB if both the given number of seconds and the given
#   number of write operations against the DB occurred.
#
#   In the example below the behaviour will be to save:
#   after 900 sec (15 min) if at least 1 key changed
#   after 300 sec (5 min) if at least 10 keys changed
#   after 60 sec if at least 10000 keys changed
#
#   Note: you can disable saving completely by commenting out all "save" lines.
#
#   It is also possible to remove all the previously configured save
#   points by adding a save directive with a single empty string argument
#   like in the following example:
#
#   save ""

save 900 1
save 300 10
save 60 10000

手动保存，即将数据快照保存到硬盘

save 同步保存操作（不推荐，因为会阻塞所有客户端）

bgsave 后台异步保存操作 （推荐，redis进程继续处理用户请求，子进程负责保存数据）

lastsave 查询保存情况